Why do I receive this error when generating a random float?

Question

Trying to generate a psuedo-random float btwn 0 and 1. Getting this error when I run the code:

‘RAND_MAX’ undeclared (first use in this function)

#include <stdio.h>
#include <time.h>

int main(test, numpoints, numtrials, dimension){

    //generate a random number
    srand(time(NULL));
    float r = (float)(rand()/RAND_MAX +1);


    printf("%.6f", r);
    printf("\n");
}

Answer 1

1. To use RAND_MAX in C, you need to include its header:

   #include <stdlib.h>
   

2. rand()/RAND_MAX is an integer division, if you want floating division, you should covert it to float first, then divide: (float)(rand()) / RAND_MAX

3. You need to define your main as:

   int main ( int arc, char **argv )