C exercises and solutions

C Exercises

C exercises intent to help you learn C programming language effectively. You can use C exercises here to help you test your knowledge and skill of writing code in C and practice the C programming lessons. You will start from basic C exercises to more complex exercises. The solution is provided for each exercise. However, you should try to solve each problem by yourself first before you check the solution. If you have any questions regarding to each problem, you can post them at our forum.

Exercise 1: Write a C program to print the following a line a shown below:

Exercise 2: Write five statements by using printf function to print the asterisk pattern:

Exercise 3:  Write a C program to declare two integer and one float variables then initialize them to 10, 15, and 12.6. It then prints these values on the screen.

 
#include <stdio.h>
#include <stdlib.h>
 
int main(int argc, char *argv[])
{
    int x;
    int y;
    float z;
    x=10;
    y=15;
    z=12.6;
    printf("x= %d",x);printf("\t");
    printf("y=%d",y);printf("\t");
    printf("z=%3.1f",z);
    printf("\n");
 
  system("PAUSE");     
  return 0;
}

Exercise 4:  Write a C program to prompt the user to input her/his age and print it on the screen, as shown below.

Exercise 5:  Write a C program to prompt the user to input 3 integer values and print these values in forward and reversed order, as shown below.

Solution:
#include <stdio.h>
#include <stdlib.h>
 
int main(int argc, char *argv[])
{
    int val1;
    int val2;
    int val3;
    printf("Please enter your 3 numbers:");
    scanf("%d %d %d",&val1,&val2,&val3);
   
    printf("\nYour numbers forward:\n");
    printf("%d",val1);printf("\n");
    printf("%d",val2);printf("\n");
    printf("%d",val3);printf("\n");
    printf("Your numbers reversed:\n");
    printf("%d",val3);printf("\n");
    printf("%d",val2);printf("\n");
    printf("%d",val1);printf("\n");
 
    system("PAUSE");   
    return 0;
}