How to generate a random int in C?

Question

Is there a function to generate a random int number in C? Or will I have to use a third party library?

Answer 1

#include 
#include 

int random(int range);

int main(void)
{
    printf("%d", random(10));
    return 0;
}

int random(int range)
{
    struct time t;
    int r;

    gettime(&t);
    r = t.ti_sec % range;
    return r;
}