Generating a random, uniformly distributed real number in C [duplicate]

Answer 1

This shows how to get random real numbers in the range 0..1 but please note that they are not uniformly distributed. There are only (RAND_MAX+1) discrete values.

#include 
#include 
#include 

int main(void) {
    int i;
    double n;
    srand((unsigned)time(NULL));            // seed the random num generator ONCE only
    for(i = 0; i < 3; i++) {                // get 3 random numbers
        n = (double)rand() / RAND_MAX;      // in the range 0 ... 1
        printf("%f\n", n);                  // use correct format specifier for the var
    }
    return 0;
}

My program output:

0.622608
0.814081
0.878689