Create a function that returns random number in C

Question

Good afternoon, I have a project in language c to deliver, and it’s almost all ready, but the teacher said q we have to use a function that returns random number, but the random function I have to create, only I have no idea is nor do I see how to do, already thank you.

Answer 1

You can try using a function that generates random numbers.

For example:

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

int main(void)
{
     int i;

     printf("Gerando 10 valores aleatorios:\n\n");

     for (i = 0; i < 10; i++)
     {
           /* gerando valores aleatórios entre zero e 100 */
           printf("%d ", rand() % 100);
     }

     getch();
     return 0;
}

Answer 2

The C language itself provides a function for generating "random" (pseudo random) numbers. To make the number "more random", you can use the time to sow the function.

Required headings:

#include <stdlib.h>     /* srand, rand */
#include <time.h>       /* time */

Code:

srand (time(NULL));
rand();

Read more on cplusplus.