C Program to Generate Random Numbers

C language has a built-in function to generate random numbers. In this program, we will use that function to generate a few random numbers.

Before you begin with the example, learn about C concepts. If you know the basics skip the step and continue with the example.

• C Printing Outputs.
• C Reading Input Values.
• C For Loop.

Problem Definition

The program uses the function from C standard library and generates random numbers. Its only requirement is a max limit to the random numbers generated. Therefore, the random number is between to max which is supplied by the user. Also, we keep the function inside of a loop so that this process is repeated for n times. The value of n is input by the user.

Program Source Code

#include <stdio.h>
#include <stdlib.h>

int main()
{

    int n, max, num, c;

    printf("Enter Number of Random Numbers You Want:");
    scanf("%d", &n);

    printf("Enter Maximum value for the Random Numbers:");
    scanf("%d", &max);

    printf("%d random numbers from 0 to %d\n\n",n,max);

for(c = 1; c <= n; c++)
{

    num = rand() % max + 1;
    printf("%d\n",num);

}

system("PAUSE"); 
return 0;

}

Output

Enter Number of Random Numbers You Want: 10
Enter Maximum value for the Random Numbers: 1000
10 random numbers from 0 to 1000

42
468
335
501
170
725
479
359
963
465
Press any key to continue . . . _