108 C Programs
Manjunath R
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Manjunath R
Author | Full Stack Developer | Building End-to-End Web Solutions | Bridging Front-End & Back-End for Seamless User Experiences
Question 1
Question:
Write a program to print Hello World!.
Solution:
#include <stdio.h>
int main() {
printf("Hello, World!");
return 0;
}
Question 2
Question:
Write a program to Find Sum of two numbers.
Solution:
#include <stdio.h>
int main() {
int num1;
int num2;
int sum;
printf("Enter value of 1st number : ");
scanf("%d", &num1);
printf("\n\nEnter value of 2nd number : ");
scanf("%d", &num2);
sum = num1 + num2;
printf("\n\n Sum of %d + %d = %d", num1, num2, sum);
return 0;
}
Question 3
Question:
Write a program to Find Difference of two numbers.
Solution:
#include <stdio.h>
int main() {
int num1;
int num2;
int difference;
printf("Enter value of 1st number : ");
scanf("%d", &num1);
printf("\n\nEnter value of 2nd number : ");
scanf("%d", &num2);
difference = num1 - num2;
printf("\n\n Difference of %d - %d = %d", num1, num2, difference);
return 0;
}
Question 4
Question:
Write a program to Find Division of two numbers.
Solution:
#include <stdio.h>
int main() {
int num1;
int num2;
int division;
printf("Enter value of 1st number : ");
scanf("%d", &num1);
printf("\n\nEnter value of 2nd number : ");
scanf("%d", &num2);
division = num1 / num2;
printf("\n\n Division of %d / %d = %d", num1, num2, division);
return 0;
}
Question 5
Question:
Write a program to Calculate Area and Circumference of Circle.
Solution:
#include <stdio.h>
int main() {
int radius;
static float PI = 3.141592;
float area;
float Circumference;
printf("Enter the radius of Circle : ");
scanf("%d", &radius);
area = PI*radius*radius;
Circumference = 2*PI*radius;
printf("\n\nArea of circle with radius %d = %f \n\n",radius, area);
printf("Circumference of circle with radius %d = %f \n\n",radius, Circumference);
return 0;
}
Question 6
Question:
Write a program to Calculate Area of Rectangle.
Solution:
#include <stdio.h>
int main()
{
int length;
int breadth;
long area;
printf(" Enter the Length of a Rectangle : ");
scanf("%d", &length);
printf("\n\n Enter the Breadth of a Rectangle : ");
scanf("%d", &breadth);
area = length*breadth;
printf("\n\n Area of Rectangle with Length as %d and Breadth as %d = %ld \n\n",length,breadth,area);
return 0;
}
Question 7
Question:
Write a program to Calculate Area of Parallelogram.
Solution:
#include <stdio.h>
int main()
{
int height;
int base;
long area;
printf(" Enter the height of a Parallelogram : ");
scanf("%d", &height);
printf("\n\n Enter the Base of a Parallelogram : ");
scanf("%d", &base);
area = height*base;
printf("\n\n Area of Parallelogram with Height as %d and Base as %d = %ld \n\n",height,base,area);
return 0;
}
Question 8
Question:
Write a program to Calculate Area of Trapezoid.
Solution:
#include <stdio.h>
int main()
{
int height;
int base1,base2;
long area;
printf(" Enter the Height of a Trapezoid : ");
scanf("%d", &height);
printf("\n\n Enter the Base 1 value : ");
scanf("%d", &base1);
printf("\n\n Enter the Base 2 value : ");
scanf("%d", &base2);
area = (height/2)*(base1+base2);
printf("\n\n Area of Trapezoid with Height as %d, Base 1 as %d and Base 2 as %d = %ld",height,base1,base2,area);
return 0;
}
Question 9
Question:
Write a program to Calculate Volume of Cube.
Solution:
#include <stdio.h>
int main()
{
int side;
long volume;
printf(" Enter the side of cube : ");
scanf("%d", &side);
volume = side*side*side;
printf("\n\n Volume of Cube with Side as %d = %ld ",side, volume);
return 0;
}
Question 10
Question:
Write a program to Calculate Volume of Cylinder.
Solution:
#include <stdio.h>
int main()
{
const float PI = 3.141592;
float radius, height, volume;
printf("Enter Radius and Height of the Cylinder\n");
scanf("%f%f", &radius, &height);
volume = PI * radius * radius * height;
printf("Volume of Cylinder is %f\n", volume);
return 0;
}
Question 11
Question:
Write a program to Calculate Area of an Ellipse.
Solution:
#include <stdio.h>
#define PI 3.141592
int main()
{
float major, minor, area;
printf("Enter length of major axis: ");
scanf("%f", &major);
printf("Enter length of minor axis: ");
scanf("%f", &minor);
area = PI * major * minor;
printf("Area of an ellipse = %0.4f", area);
return 0;
}
Question 12
Question:
Write a program to Calculate Volume of Pyramid.
Solution:
#include <stdio.h>
#define PI 3.141592
int main()
{
int basearea;
int height;
float volume;
printf("\n\n Enter the Base Area of Pyramid : ");
scanf("%d", &basearea);
printf("\n\n Enter the Height of Pyramid : ");
scanf("%d", &height);
volume = (1/3)*basearea*height;
printf("\n\n Volume of Pyramid with Base Area as %d and Height as %d = %f",basearea,height,volume);
return 0;
}
Question 13
Question:
Write a program to Calculate Volume of Cone.
Solution:
#include <stdio.h>
int main()
{
int height;
int radius;
float volume;
float PI = 3.141592;
printf("\n\n Enter the Radius of Cone : ");
scanf("%d", &radius);
printf("\n\n Enter the Height of Cone : ");
scanf("%d", &height);
volume = 1/3 * PI*radius*radius*height;
printf("\n\n Volume of Cone with Radius as %d and Height as %d = %f",radius,height,volume);
return 0;
}
Question 14
Question:
Write a program to Calculate Volume of Sphere.
Solution:
#include <stdio.h>
int main()
{
int radius;
float volume;
float PI = 3.141592;
printf("\n\n Enter the Radius of Sphere : ");
scanf("%d", &radius);
volume_of_sphere = (4/3)*(PI*radius*radius*radius);
printf("\n\n Volume of Sphere with Radius as %d = %f",radius,volume);
return 0;
}
Question 15
Question:
Write a program to Calculate Volume of Ellipsoid.
Solution:
#include <stdio.h>
int main()
{
int r1,r2,r3;
float volume;
float PI = 3.141592;
printf("\n\n Enter the Radius of the ellipsoid of axis 1 : ");
scanf("%d", &r1);
printf("\n\n Enter the Radius of the ellipsoid of axis 2 : ");
scanf("%d", &r2);
printf("\n\n Enter the Radius of the ellipsoid of axis 3 : ");
scanf("%d", &r3);
volume = (4/3)*(PI*r1*r2*r3);
printf("\n\n Volume of Ellipsoid with (r1,r2,r3) as (%d,%d,%d) = %f",r1,r2,r3,volume);
return 0;
}
Question 16
Question:
Write a program to Calculate Surface area of Cube.
Solution:
#include <stdio.h>
int main()
{
int side;
long surfacearea;
printf("\n\n Enter the Side of Cube : ");
scanf("%d", &side);
surfacearea = 6*side*side;
printf("\n\n Surface area of Cude with side as %d = %ld",side,surfacearea);
return 0;
}
Question 17
Question:
Write a program to Calculate Surface area of Sphere.
Solution:
#include <stdio.h>
int main()
{
int radius;
float PI = 3.141592;
float surfacearea;
printf("\n\n Enter the Radius of Sphere : ");
scanf("%d", &radius);
surfacearea = 4*PI*radius*radius;
printf("\n\n Surface area of Sphere with radius as %d = %lf",radius,surfacearea);
return 0;
}
Question 18
Question:
Write a program to Generate Multiplication Table.
Solution:
#include <stdio.h>
int main()
{
int number;
int i = 1;
printf("\n\n Enter number to generate Multiplication Table : ");
scanf("%d", &number);
printf("\n\nMultiplication Table of %d : \n",number);
for(i; i <11 ; i++) {
printf("%d x %d = %d \n\n",number,i, i*number);
}
return 0;
}
Question 19
Question:
Write a program to Compute Simple Interest.
Solution:
#include <stdio.h>
int main()
{
int principal;
int rate;
int duration;
float simpleInterest;
printf("\n\n Enter Principal Amount : ");
scanf("%d", &principal);
printf("\n\n Enter Rate of Interest : ");
scanf("%d", &rate);
printf("\n\n Enter Duration : ");
scanf("%d", &duration);
simpleInterest = (principal*duration*rate)/100;
printf("\n\nSimple Interest : %lf \n",simpleInterest);
return 0;
}
Question 20
Question:
Write a program to Convert Degree to Fahrenheit.
Solution:
#include <stdio.h>
int main()
{
float degree,fahrenheit;
printf("\n\n Enter Temperature in Degrees : ");
scanf("%f", °ree);
fahrenheit = (1.8*degree)+32;
printf("\n\n %f Degree in Fahrenheit = : %f \n",degree,fahrenheit);
return 0;
}
Question 21
Question:
Write a program to Convert Fahrenheit to Degree.
Solution:
#include <stdio.h>
int main()
{
float degree;
float fahrenheit;
printf("\n\n Enter Temperature in Fahrenheit : ");
scanf("%f", &fahrenheit);
degree = ((fahrenheit-32)*5)/9;
printf("\n\n %f Fahrenheit in Degree Celsius = %f \n",fahrenheit,degree);
return 0;
}
Question 22
Question:
Write a program to Convert Meters to Feet.
Solution:
#include <stdio.h>
int main()
{
float meter;
float feet;
printf("\n\n Enter Length in Meters : ");
scanf("%f", &meter);
feet = (meter*3.2808);
printf("\n\n %f meter in feet = %f \n",meter,feet);
return 0;
}
Question 23
Question:
Write a program to Convert Feet to Meters.
Solution:
#include <stdio.h>
int main()
{
float meter;
float feet;
printf("\n\n Enter Length in Feet : ");
scanf("%f", &feet);
meter = (feet/3.2808);
printf("\n\n %f Feet in Meter = %f \n",feet,meter);
return 0;
}
Question 24
Question:
Write a program to Convert Feet to Centimeters.
Solution:
#include <stdio.h>
int main()
{
float cm;
float feet;
printf("\n\n Enter Length in Feet : ");
scanf("%f", &feet);
cm = 30.48 * feet;
printf("\n\n %f Feet in Meter = %f \n",feet,cm);
return 0;
}
Question 25
Question:
Write a program to Convert Feet to millimeters.
Solution:
#include <stdio.h>
int main()
{
float mm;
float feet;
printf("\n\n Enter Length in Feet : ");
scanf("%f", &feet);
mm = (feet * 304.8);
printf("\n\n %f Feet in Millimeter = %f \n",feet,mm);
return 0;
}
Question 26
Question:
Write a program to Convert Kilometer to Miles.
Solution:
#include <stdio.h>
int main()
{
float km;
float miles;
printf("\n\n Enter Length in Kilometer : ");
scanf("%f", &km);
miles = (0.621371*km);
printf("\n\n %f Kilometer in Millimeter = %f \n",km,miles);
return 0;
}
Question 27
Question:
Write a program to Convert Yard to Foot.
Solution:
#include <stdio.h>
int main()
{
float yard;
float foot;
printf("\n\n Enter Length in Yard : ");
scanf("%f", &yard);
foot = (3*yard);
printf("\n\n %f Yard in Foot = %f \n",yard,foot);
return 0;
}
Question 28
Question:
Write a program to Convert Inch to Cm.
Solution:
#include <stdio.h>
int main()
{
float inch;
float cm;
printf("\n\n Enter Length in inch : ");
scanf("%f", &inch);
cm = (2.54*inch);
printf("\n\n %f inch in cm = %f \n",inch,cm);
return 0;
}
Question 29
Question:
Write a program to convert bytes to kilobytes.
Solution:
#include <stdio.h>
int main()
{
int bytes;
double kilobytes;
printf("Enter number of bytes: ");
scanf("%d",&bytes);
kilobytes=bytes/1024.00;
printf("Kilobytes: %.2lf",kilobytes);
return 0;
}
Question 30
Question:
Write a program to convert MB to KB.
Solution:
#include <stdio.h>
int main()
{
double megabytes , kilobytes;
printf("Please enter the amount of megabytes to convert.\n");
scanf("%lf",&megabytes);
kilobytes = megabytes * 1024;
printf("There are %lf kilobytes in %lf megabytes.\n",kilobytes,megabytes);
return 0;
}
Question 31
Question:
Write a program to convert GB to MB.
Solution:
#include <stdio.h>
int main()
{
double gb, mb;
printf("\n\n Enter Length in Gigabyte : ");
scanf("%lf", &gb);
mb = gb*1024;
printf("\n\n %lf GB = %lf MB \n",gb,mb);
return 0;
}
Question 32
Question:
Write a program to convert KB to MB.
Solution:
#include<stdio.h>
int main()
{
double kb, mb;
printf("\n\n Enter Length in Kilobyte : ");
scanf("%lf", &kb);
mb = (kb/1024);
printf("\n\n %lf KB = %lf MB \n",kb,mb);
return 0;
}
Question 33
Question:
Write a program to Convert Kilogram to Pounds.
Solution:
#include <stdio.h>
int main()
{
float kg,lbs;
printf("\n\n Enter Weight in Kilogram : ");
scanf("%f", &kg);
lbs = kg*2.20462;
printf("\n\n %f Kg = %f Pounds \n",kg,lbs );
return 0;
}
Question 34
Question:
Write a program to Convert Kilogram to Ounce.
Solution:
#include <stdio.h>
int main()
{
float kg,ounce;
printf("\n\n Enter Weight in Kilogram : ");
scanf("%f", &kg);
ounce = kg*35.274;
printf("\n\n %f Kg = %f Ounce \n",kg,ounce );
return 0;
}
Question 35
Question:
Write a program to Convert Pounds to Grams.
Solution:
#include <stdio.h>
int main()
{
float pound,gram;
printf("\n\n Enter Weight in Pounds : ");
scanf("%f", £);
gram = pound*453.592;
printf("\n\n %f Pound = %f Grams \n",pound,gram );
return 0;
}
Question 36
Question:
Write a program to Calculate total marks and Percentage.
Solution:
#include <stdio.h>
int main()
{
int algebra,geometry,arithmetic;
int sum;
float percentage;
printf("\n\n Enter Marks Scored in Algebra : ");
scanf("%d", &algebra);
printf("\n\n Enter Marks Scored in Geometry : ");
scanf("%d", &geometry);
printf("\n\n Enter Marks Scored in Arithmetic : ");
scanf("%d", &arithmetic);
sum = algebra+geometry+arithmetic;
percentage = (sum*100)/300;
printf("\n\n Total marks scored = %d /300", sum );
printf("\n\n Percentage Scored = %f", percentage );
return 0;
}
Question 37
Question:
Write a program to Calculate Discount Amount and Discounted Price.
Solution:
#include <stdio.h>
int main()
{
float price;
float discountpercentage;
float discountamount;
float discountedprice;
printf("\n\n Enter Price of Item : ");
scanf("%f", &price);
printf("\n\n Enter Discount Percentage on Item : ");
scanf("%f", &discountpercentage);
discountamount = (discountpercentage*price)/100;
discountedprice = (price-discountamount);
printf("\n\nDiscount amount : %f \n\n", discountamount);
printf("Discounted price : %f \n\n", discountedprice);
return 0;
}
Question 38
Question:
Write a program to Swap two numbers using a Temporary variable.
Solution:
#include <stdio.h>
int main()
{
double first, second, temp;
printf("\n\n Enter first number : ");
scanf("%lf", &first);
printf("\n\n Enter second number : ");
scanf("%lf", &second);
printf("\n\n Before Swapping => first number : %lf second number : %lf ", first, second);
temp = first;
first = second;
second = temp;
printf("\n\n After Swapping => first number : %lf second number : %lf ", first, second);
return 0;
}
Question 39
Question:
Write a program to Swap two numbers without using a Temporary variable.
Solution:
#include <stdio.h>
int main()
{
double first, second;
printf("\n\n Enter first number : ");
scanf("%lf", &first);
printf("\n\n Enter second number : ");
scanf("%lf", &second);
printf("\n\n Before Swapping => first number : %lf second number : %lf ", first,second);
first = first + second;
second = first - second;
first = first - second;
printf("\n\n After Swapping => first number : %lf second number : %lf ", first,second);
return 0;
}
Question 40
Question:
Write a program to Reverse Digits of a Number.
Solution:
#include <stdio.h>
int main(){
int number, reverse = 0;
printf("Enter any number \n");
scanf("%d", &number);
while(number != 0){
reverse = (reverse * 10) + number % 10;
number = number/10;
}
printf("Reversed number : %d\n", reverse);
return 0;
}
Question 41
Question:
Write a program to Calculate sum of Digits of Entered Number.
Solution:
#include <stdio.h>
int main()
{
int n, m, sum = 0;
printf("Enter a number\n");
scanf("%d", &n);
m = n;
while (m != 0)
{
sum = sum + m % 10;
m = m / 10;
}
printf("Sum of digits of %d = %d\n", n, sum);
return 0;
}
Question 42
Question:
Write a program to calculate the largest of 3 numbers.
Solution:
#include <stdio.h>
int main()
{
int A, B, C;
printf("Enter the numbers A, B and C: ");
scanf("%d %d %d", &A, &B, &C);
if (A >= B && A >= C)
printf("%d is the largest number.", A);
if (B >= A && B >= C)
printf("%d is the largest number.", B);
if (C >= A && C >= B)
printf("%d is the largest number.", C);
return 0;
}
Question 43
Question:
Write a program to Check Entered character is a Vowel or Consonant.
Solution:
#include <stdio.h>
int main()
{
char ch;
printf("\n\n Enter a character : ");
scanf("%c", &ch);
if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U' ) {
printf("\n\n %c is a Vowel!! ",ch);
}
else {
printf("\n\n %c is a Consonant!! ",ch);
}
return 0;
}
Question 44
Question:
Write a program to Check Entered Number is a Leap Year or not.
Solution:
#include <stdio.h>
int main()
{
int year;
printf("\n\n Enter a Number : ");
scanf("%d", &year);
if ((year % 400 == 0) || ( ( year % 100 != 0) && (year % 4 == 0 ))) {
printf("\n\n %d is a leap year!",year);
}
else {
printf("\n\n %d is not a leap year!!",year);
}
return 0;
}
Question 45
Question:
Write a program to find factorial of a number.
Solution:
#include <stdio.h>
int main()
{
int num,i;
long int fact;
printf("Enter an integer number: ");
scanf("%d",&num);
/*product of numbers from num to 1*/
fact=1;
for(i=num; i>=1; i--)
fact=fact*i;
printf("\nFactorial of %d is = %ld",num,fact);
return 0;
}
Question 46
Question:
Write a program to Display day of week using switch case.
Solution:
#include <stdio.h>
int main()
{
int day;
printf("\n\n Enter Day (1 to 7) : ");
scanf("%d", &day);
switch(day) {
case 1:
printf("\n\n The 1st day of week is : Sunday");
break;
case 2:
printf("\n\n The 2nd day of week is : Monday");
break;
case 3:
printf("\n\n The 3rd day of week is : Tuesday");
break;
case 4:
printf("\n\n The 4th day of week is : Wednesday");
break;
case 5:
printf("\n\n The 5th day of week is : Thursday");
break;
case 6:
printf("\n\n The 6th day of week is : Friday");
break;
case 7:
printf("\n\n The 7th day of week is : Saturday");
break;
default:
printf("Invalid input!!! ..... ");
}
return 0;
}
Question 47
Question:
Write a program to Check Entered number is positive or negative.
Solution:
#include <stdio.h>
int main()
{
int number;
printf("\n\n Enter a number : ");
scanf("%d", &number);
if(number > 0) {
printf("\n\n Entered number %d is a positive number ",number);
}
else if(number < 0) {
printf("\n\n Entered number %d is a negative number ",number);
}
else {
printf("\n\n Entered number %d is neither positive nor negative ",number);
}
return 0;
}
Question 48
Question:
Write a program to Check Entered Character is Upper Case or Lower Case.
Solution:
#include <stdio.h>
int main(){
char ch;
printf("Enter a alphabet : ");
scanf("%c",&ch);
if(ch>=65 && ch<=90)
printf("upper case");
else if(ch>=97 && ch<=122)
printf("lower case");
else
printf("Invalid input");
return 0;
}
Question 49
Question:
Write a program to Print Number of Days in a Month.
Solution:
#include <stdio.h>
int main(){
int a[12]={31,28,31,30,31,30,31,31,30,31,30,31},m;
printf("Enter the month: ");
scanf("%d",&m);
if(m>12 || m<1)
{
printf("Invalid input");
}
else if(m==2)
{
printf("Number of days in month 2 is either 29 or 28");
}
else
printf("Number of days in month %d is %d",m,a[m-1]);
return 0;
}
Question 50
Question:
Write a program to calculate the length of string.
Solution:
#include <stdio.h>
#include <string.h>
int main()
{
char Str[1000];
int i;
printf("Enter the String: ");
scanf("%s", Str);
for (i = 0; Str[i] != '\0'; ++i);
printf("Length of '%s' is %d",Str, i);
return 0;
}
Question 51
Question:
Write a program to Concatenate Two Strings.
Solution:
#include <stdio.h>
#include <string.h>
int main()
{
char a[1000], b[1000];
printf("Enter the first string\n");
scanf("%s", a);
printf("Enter the second string\n");
scanf("%s", b);
strcat(a, b);
printf("String obtained on concatenation: %s\n", a);
return 0;
}
Question 52
Question:
Write a program to Find Maximum Between Two Numbers.
Solution:
#include <stdio.h>
int main()
{
int a,b;
printf("Enter two numbers:\n");
scanf("%d%d",&a,&b);
if(a>b)
printf("%d is a maximum number\n",a);
else
printf("%d is a maximum number\n",b);
return 0;
}
Question 53
Question:
Write a program to check whether the entered number is a prime number or not.
Solution:
#include <stdio.h>
int main()
{
int num, i, count=0;
printf("Enter a number: ");
scanf("%d", &num);
for(i=2; i<num; i++)
{
if(num%i == 0)
{
count++;
break;
}
}
if(count==0) {
printf("\n %d is a prime number", num);
}
else {
printf("\n %d is not a prime number", num);
}
return 0;
}
Question 54
Question:
Write a program to Get Input from User.
Solution:
#include <stdio.h>
int main()
{
int num;
printf("Enter the Number: ");
scanf("%d", &num);
printf("\nYou've entered: %d", num);
return 0;
}
Question 55
Question:
Write a program to Print ASCII Value of entered Alphabet.
Solution:
#include<stdio.h>
#include<conio.h>
int main()
{
char ch;
int i;
printf("Enter a Alphabet: ");
scanf("%c", &ch);
i = ch;
printf("\nASCII Value of %c = %d", ch, i);
return 0;
}
Question 56
Question:
Write a program to Compare Two Strings.
Solution:
#include <stdio.h>
#include <string.h>
int main()
{
char a[100], b[100];
printf("Enter a string\n");
scanf("%s", a);
printf("Enter a string\n");
scanf("%s", b);
if (strcmp(a,b) == 0) {
printf("The strings are equal.\n");
}
else {
printf("The strings are not equal.\n");
}
return 0;
}
Question 57
Question:
Write a program to Convert Lowercase to Uppercase.
Solution:
#include <ctype.h>
#include <stdio.h>
int main()
{
char ch;
ch = 'g';
printf("%c in uppercase is represented as %c", ch, toupper(ch));
return 0;
}
Question 58
Question:
Write a program to Convert Uppercase to Lowercase.
Solution:
#include <ctype.h>
#include <stdio.h>
int main()
{
char ch;
ch = 'G';
printf("%c in lowercase is represented as %c", ch, tolower(ch));
return 0;
}
Question 59
Question:
Write a program to find the Average of two numbers.
Solution:
#include <stdio.h>
int main()
{
int num1, num2;
float avg;
printf("Enter first number: ");
scanf("%d",&num1);
printf("Enter second number: ");
scanf("%d",&num2);
avg= (float)(num1+num2)/2;
printf("Average of %d and %d is: %.2f",num1,num2,avg);
return 0;
}
Question 60
Question:
Write a program to find Quotient and Remainder.
Solution:
#include <stdio.h>
int main() {
int dividend, divisor, quotient, remainder;
printf("Enter dividend: ");
scanf("%d", ÷nd);
printf("Enter divisor: ");
scanf("%d", &divisor);
quotient = dividend / divisor;
remainder = dividend % divisor;
printf("Quotient = %d\n", quotient);
printf("Remainder = %d", remainder);
return 0;
}
Question 61
Question:
Write a program to find the square of a number.
Solution:
#include<stdio.h>
#include<math.h>
int main()
{
int a, b;
a=2;
b = pow((a), 2);
printf("The square of a = %d", b);
return 0;
}
Question 62
Question:
Write a program to print the average of the elements in the array.
Solution:
#include<stdio.h>
int main()
{
int i, avg, sum = 0;
int num [5] = {16, 18, 20, 25, 36};
for(i=0; i<5; i++)
sum = sum + num [i];
avg = sum/5;
printf("Sum of the Elements in the array = %d", sum);
printf("Average of the elements in the array= %d", avg);
return 0;
}
Question 63
Question:
Write a program to find the greatest of two numbers using pointers.
Solution:
#include<stdio.h>
int main()
{
int x, y, *p, *q;
printf("Enter any integer:");
scanf("%d", &x);
printf("Enter any integer:");
scanf("%d", &y);
p = &x;
q = &y;
if(*p>*q)
{
printf("x is greater than y");
}
if(*q>*p)
{
printf("y is greater than x");
}
return 0;
}
Question 64
Question:
Write a program to print the address of x and the value assigned to x.
Solution:
#include <stdio.h>
int main()
{
int x, *p;
x = 1;
p = &x;
printf("The address of the variable x =%d", p);
printf("The value of the variable x =%d", *p);
return 0;
}
Question 65
Question:
Write a program to print the first 10 numbers starting from one together with their squares and cubes.
Solution:
#include<stdio.h>
int main()
{
int i;
for( i=1; i<=10; i++)
printf("Number=%d its square=%d its cube=%d\n", i , i*i, i*i*i);
return 0;
}
Question 66
Question:
Write a program:
If you enter a character M
Output must be: ch = M.
Solution:
#include<stdio.h>
int main()
{
char M;
printf("Enter any character:");
scanf("%c", &M);
printf("ch=%c", M);
return 0;
}
Question 67
Question:
Write a program to print the product of the first 10 digits.
Solution:
#include<stdio.h>
int main()
{
int i, product = 1;
for( i=1; i<=10; i++)
product = product * i;
printf("The product of the first 10 digits =%d", product);
return 0;
}
Question 68
Question:
Write a program to check the equivalence of two numbers.
Solution:
#include<stdio.h>
int main()
{
int x, y;
printf("Enter any number:");
scanf ("%d", &x);
printf("Enter any number:");
scanf ("%d", &y);
if(x-y==0)
{
printf("The two numbers are equivalent");
}
else
{
printf("The two numbers are not equivalent");
}
return 0;
}
Question 69
Question:
Write a program to print the characters from A to Z.
Solution:
#include<stdio.h>
int main()
{
char a;
for( a='A'; a<='Z'; a++)
printf("%c\n", a);
return 0;
}
Question 70
Question:
Write a program to find the incremented and decremented values of two numbers.
Solution:
#include<stdio.h>
int main()
{
int a, b, c, d, e, f;
a = 10;
b=12;
c=a+1;
d=b+1;
e=a-1;
f=b-1;
printf("The incremented value of a =%d", c);
printf("The incremented value of b =%d", d);
printf("The decremented value of a =%d", e);
printf("The decremented value of b =%d", f);
return 0;
}
Question 71
Question:
Write a program to print the output:
Einstein [0] = E
Einstein [1] = I
Einstein [2] = N
Einstein [3] = S
Einstein [4] = T
Einstein [5] = E
Einstein [6] = I
Einstein [7] = N
Solution:
#include<stdio.h>
int main()
{
int i;
char name [8] = {' E' , ' I', ' N', ' S', ' T ', ' E', ' I', ' N'};
for(i=0; i<8; i++)
printf("\n Element [%d] = %c", i, name[i]);
return 0;
}
Question 72
Question:
Write a program to find square of a number using functions.
Solution:
#include<stdio.h>
int square();
int main()
{
int answer;
answer = square();
printf("Square of the given number=%d", answer);
return(0);
}
int square()
{
int x;
printf("Enter any integer:");
scanf("%d", &x);
return x*x;
}
Question 73
Question:
Write a program To print "hello world" 10 times.
Solution:
#include<stdio.h>
int main()
{
int i;
for (i =1; i<=10; i ++)
printf("hello world \n");
return 0;
}
Question 74
Question:
Write a program to print first 5 numbers using do while loop statement.
Solution:
#include<stdio.h>
int main()
{
int i =1;
do
{
printf("%d\n", i++);
} while (i<=5);
return 0;
}
Question 75
Question:
Write a program to print the output:
body [b] = b
body [o] = o
body [d] = d
body [y] = y
Solution:
#include <stdio.h>
int main()
{
char i;
char body [4] = {'b', 'o', 'd', 'y'};
for(i=0; i<4; i++)
printf("\n body[%c] = %c", body[i] , body[i]);
return 0;
}
Question 76
Question:
Write a program to check whether a character is an alphabet or not.
Solution:
#include <stdio.h>
#include <ctype.h>
int main()
{
int a =2;
if(isalpha(a))
{
printf("The character a is an alphabet");
}
else
{
printf("The character a is not an alphabet");
}
return 0;
}
Question 77
Question:
Write a program to calculate the discounted price and the total price after discount
Given:
If purchase value is greater than 1000, 10% discount
If purchase value is greater than 5000, 20% discount
If purchase value is greater than 10000, 30% discount.
Solution:
#include<stdio.h>
int main()
{
double PV;
printf("Enter purchased value:");
scanf("%lf", &PV);
if(PV>1000)
{
printf("\n Discount=%lf", PV* 0.1);
printf("\n Total=%lf", PV - PV* 0.1);
}
else if(PV>5000)
{
printf("\n Discount =%lf", PV* 0.2);
printf("\n Total=%lf", PV - PV* 0.1);
}
else
{
printf("\n Discount=%lf", PV* 0.3);
printf("\n Total=%lf", PV - PV* 0.1);
}
return 0;
}
Question 78
Question:
Write a program to print the first ten natural numbers using while loop statement.
Solution:
#include<stdio.h>
int main()
{
int i = 1;
while (i<=10)
{
printf("%d\n", i++);
}
return 0;
}
Question 79
Question:
Write a program to check whether the person is a senior citizen or not.
Solution:
#include<stdio.h>
int main()
{
int age;
printf("Enter age:");
scanf("%d", &age);
if(age>=60)
{
printf("senior citizen");
}
else
{
printf("not a senior citizen");
}
return 0;
}
Question 80
Question:
Write a program to find the size of data types.
Solution:
#include<stdio.h>
int main()
{
printf("Size of char: %ld byte\n",sizeof(char));
printf("Size of int: %ld bytes\n",sizeof(int));
printf("Size of float: %ld bytes\n",sizeof(float));
printf("Size of double: %ld bytes", sizeof(double));
return 0;
}
Question 81
Question:
Write a program to check whether a triangle is valid (given sides of triangle).
Solution:
#include <stdio.h>
int main() {
int side1, side2, side3;
printf("Enter Length of Three Sides of a Triangle\n");
scanf("%d %d %d", &side1, &side2, &side3);
if((side1 + side2 > side3)&&(side2 + side3 > side1) &&(side3 + side1 > side2)) {
printf("It is a Valid Triangle\n");
} else {
printf("It is an invalid Triangle");
}
return 0;
}
Question 82
Question:
Write a program to check whether a triangle is valid (given angles of triangle).
Solution:
#include<stdio.h>
int main()
{
int angle1, angle2, angle3, sum;
printf("\n Enter Three Angles of a Triangle : ");
scanf("%d%d%d", &angle1, &angle2, &angle3);
sum = angle1 + angle2 + angle3;
if(sum == 180)
{
printf("\n This is a Valid Triangle");
}
else
{
printf("\n This is an Invalid Triangle");
}
return 0;
}
Question 83
Question:
Write a program to print your name, date of birth and email address.
Solution:
#include <stdio.h>
int main()
{
printf("Name : Albert Einstein\n");
printf("DOB : 14 March 1879\n");
printf("Email : [email protected]\n");
return(0);
}
Question 84
Question:
Write a program to convert specified days into years, weeks and days.
Solution:
#include <stdio.h>
int main()
{
int days, years, weeks;
printf("Enter number of days\n");
scanf("%d", &days);
years = days/365;
weeks = (days % 365)/7;
days = days- ((years*365) + (weeks*7));
printf("Years: %d\n", years);
printf("Weeks: %d\n", weeks);
printf("Days: %d \n", days);
return 0;
}
Question 85
Question:
Write a program to Check the password until it is correct.
Solution:
#include <stdio.h>
int main() {
int pass, a;
while (a!=0)
{
printf("\nInput the password: ");
scanf("%d",&pass);
if (pass==1988)
{
printf("Correct password");
a=0;
}
else
{
printf("Wrong password, try again");
}
printf("\n");
}
return 0;
}
Question 86
Question:
Write a program to Read an integer and find all its divisor.
Solution:
#include <stdio.h>
int main() {
int x, i;
printf("\nEnter a number : ");
scanf("%d", &x);
printf("All the divisor of %d are: ", x);
for(i = 1; i <= x; i++) {
if((x%i) == 0){
printf("\n%d", i);
printf("\n");
}
}
return 0;
}
Question 87
Question:
Write a program to shift given data by two bits to the left.
Solution:
#include<stdio.h>
int main()
{
int a, b;
printf("Enter a integer : ");
scanf("%d",&a);
printf("\nInteger value = %d ",a);
a<<=2;
b=a;
printf("\nThe left shifted data is = %d ",b);
return 0;
}
Question 88
Question:
Write a program to Find Absolute Value of a Number.
Solution:
#include<stdio.h>
#include<stdlib.h>
int main()
{
int num;
printf("Enter a positive or negative number\n");
scanf("%d", &num);
printf("Absolute Value of |%d| is %d\n", num, abs(num));
return 0;
}
Question 89
Question:
Write a program to accept the height of a person in centimeter and categorize the person according to their height.
Solution:
#include <stdio.h>
int main()
{
float height;
printf("Enter the height of the person (in cm) :");
scanf("%f", &height);
if (height < 150.0) {
printf("The person is Dwarf. \n");
}
else if ((height >= 150.0) && (height < 165.0)) {
printf("The person is average heighted. \n");
}
else if ((height >= 165.0) && (height <= 195.0)) {
printf("The person is taller. \n");
}
else
{
printf("Abnormal height.\n");
}
return 0;
}
Question 90
Question:
Write a program to compute the area of the various geometrical shape.
Solution:
#include <stdio.h>
int main()
{
int choice,r,l,w,b,h;
float area;
printf("Enter 1 for area of circle\n");
printf("Enter 2 for area of rectangle\n");
printf("Enter 3 for area of triangle\n");
printf("Enter your choice : ");
scanf("%d",&choice);
switch(choice)
{
case 1:
printf("Enter the radius of the circle : ");
scanf("%d",&r);
area=3.14*r*r;
break;
case 2:
printf("Enter the length and width of the rectangle : ");
scanf("%d%d",&l,&w);
area=l*w;
break;
case 3:
printf("Enter the base and height of the triangle :");
scanf("%d%d",&b,&h);
area=0.5*b*h;
break;
}
printf("The area is : %f\n",area);
return 0;
}
Question 91
Question:
Write a program to Find Length of String Using Library Function.
Solution:
#include<stdio.h>
#include<string.h>
int main() {
char str[100];
int len;
printf("\nEnter the String : ");
scanf("%s", str);
len = strlen(str);
printf("\nLength of Given String : %d", len);
return(0);
}
Question 92
Question:
Write a program to illustrate the bitwise operators.
Solution:
#include<stdio.h>
int main() {
int a, b;
a=125;
b=35;
a=a>>1;
printf("After right-shifting by 1, a=%d\n", a);
b=b<<2;
printf("After left-shifting by 2, b=%d\n", b);
return(0);
}
Question 93
Question:
Write a program to illustrate the ternary operation.
Solution:
#include<stdio.h>
/*
c will be assigned the value of a
if a is less than b.
Otherwise, it will be assigned the value of b
*/
int main() {
int a = 10, b = 20, c;
c = (a < b) ? a : b;
printf("%d", c);
return(0);
}
Question 94
Question:
Write a program to accept a character from the keyboard and print "yes" if it is equal to y. Otherwise print "No".
Solution:
#include<stdio.h>
int main() {
char ch;
printf ("Enter a character \n");
ch = getchar ();
if (ch == 'y' || ch == 'Y')
printf ("yes\n");
else
printf ("No\n");
return(0);
}
Question 95
Question:
Write a program to Demonstrate goto Statement.
Solution:
#include <stdio.h>
int main()
{
int sum=0;
for(int i = 0; i<=10; i++){
sum = sum+i;
if(i==4){
goto addition;
}
}
addition:
printf("%d", sum);
return 0;
}
Question 96
Question:
Write a program to Demonstrate Infinite Loop.
Solution:
#include <stdio.h>
int main() {
int i = 10;
for( ; ;) {
printf("%d\n",i);
}
return 0;
}
Question 97
Question:
Write a program to Demonstrate Macro Substitution.
Solution:
#include <stdio.h>
#define A 15
int main()
{
int x;
x=A;
printf("%d",x);
return 0;
}
Question 98
Question:
Write a program to Check Whether a Number is Even or Odd.
Solution:
#include <stdio.h>
int main() {
int num;
printf("Enter a number : ");
scanf("%d", &num);
if(num % 2 == 0)
printf("%d is even.", num);
else
printf("%d is odd.", num);
return 0;
}
Question 99
Question:
Write a program to multiply given number by 4 using bitwise operators.
Solution:
#include <stdio.h>
int main() {
long number, tempnum;
printf("Enter an integer \n");
scanf("%ld", &number);
tempnum = number;
number = number << 2;
printf("%ld x 4 = %ld\n", tempnum, number);
return 0;
}
Question 100
Question:
Write a program to check whether a number is power of 2 or not.
Solution:
#include <stdio.h>
int main() {
int num;
printf("Enter a number : ");
scanf("%d", &num);
if((num != 0) && ((num &(num - 1)) == 0)) {
printf("\n%d is a power of 2", num);
}
else {
printf("\n%d is not a power of 2\n", num);
}
return 0;
}
Question 101
Question:
Write a program to check whether the triangle is equilateral, isosceles or scalene.
Solution:
#include <stdio.h>
int main(){
int side1, side2, side3;
printf("Enter the sides of triangle : ");
scanf("%d%d%d",&side1,&side2,&side3);
if(side1 == side2 && side2 == side3) {
printf("The given Triangle is equilateral.\n");
}
else if(side1 == side2 || side2 == side3 || side3 == side1) {
printf("The given Triangle is isosceles.\n");
}
else {
printf("The given Triangle is scalene.\n");
}
return 0;
}
Question 102
Question:
Write a program to print ASCII values of all the letters of the English alphabet from A to Z.
Solution:
#include <stdio.h>
int main()
{
int i;
for(i='A'; i<='Z'; i++)
{
printf("ASCII value of %c = %d\n", i, i);
}
return 0;
}
Question 103
Question:
Write a program to find sum of even numbers between 1 to n.
Solution:
#include <stdio.h>
int main()
{
int i, num, sum=0;
printf("Enter a number: ");
scanf("%d", &num);
for(i=2; i<=num; i=i+2)
{
sum = sum + i;
}
printf("Sum of all even number between 1 to %d: %d", num, sum);
return 0;
}
Question 104
Question:
Write a program to find sum of odd numbers between 1 to n.
Solution:
#include <stdio.h>
int main()
{
int i, num, sum=0;
printf("Enter a number: ");
scanf("%d", &num);
for(i=1; i<=num; i=i+2)
{
sum = sum + i;
}
printf("Sum of all odd number between 1 to %d: %d", num, sum);
return 0;
}
Question 105
Question:
Write a program to find maximum number using switch case.
Solution:
#include <stdio.h>
int main()
{
int num1, num2;
printf("Enter two numbers : ");
scanf("%d%d", &num1, &num2);
switch(num1 > num2)
{
case 0: printf("%d is Maximum number", num2);
break;
case 1: printf("%d is Maximum number", num1);
break;
}
return 0;
}
Question 106
Question:
Write a program to create simple calculator using switch case.
Solution:
# include <stdio.h>
int main() {
char operator;
double firstNumber,secondNumber;
printf("Enter an operator (+, -, *,): ");
scanf("%c", &operator);
printf("Enter two operands: ");
scanf("%lf %lf",&firstNumber, &secondNumber);
switch(operator)
{
case '+':
printf("%.1lf + %.1lf = %.1lf",firstNumber, secondNumber, firstNumber + secondNumber);
break;
case '-':
printf("%.1lf - %.1lf = %.1lf",firstNumber, secondNumber, firstNumber - secondNumber);
break;
case '*':
printf("%.1lf * %.1lf = %.1lf",firstNumber, secondNumber, firstNumber * secondNumber);
break;
case '/':
printf("%.1lf / %.1lf = %.1lf",firstNumber, secondNumber, firstNumber / secondNumber);
break;
default:
printf("Error! please enter correct operator");
}
return 0;
}
Question 106
Question:
Write a program to find Square Root of a Number.
Solution:
#include<stdio.h>
#include<math.h>
int main()
{
int number;
double result;
printf("Enter any integer number: ");
scanf("%d",&number);
result = sqrt(number);
printf("Square root of %d is %.2lf",number, result);
return 0;
}
Question 107
Question:
Write a program to Find Power of a Number Using Library Function.
Solution:
#include<stdio.h>
#include<math.h>
int main()
{
int base, exponent;
long power;
printf("Enter base and Exponent: ");
scanf("%d %d", &base, &exponent);
power = pow(base,exponent);
printf("Result = %ld",power);
return 0;
}
Question 108
Question:
Write a program to check whether the entered Character is Alphabet or Digit.
Solution:
#include <stdio.h>
#include<ctype.h>
int main()
{
char ch;
printf("Enter a character : ");
scanf("%c", &ch);
if (isdigit(ch))
{
printf("\n %c is a Digit", ch);
}
else if ( isalpha(ch) )
{
printf("\n %c is an Alphabet", ch);
}
else
printf("\n %c is not an Alphabet, or a Digit", ch);
return 0;
}