gistfile1.c

// Write a C function whose return value is an integer between one and five:

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

int sample(int minimum, int maximum)
{
  int random = rand();

  int range = maximum - minimum;

  if (RAND_MAX == random)
  {
    return sample(minimum, maximum);
  }

  if (random < RAND_MAX - (RAND_MAX % range))
  {
    return minimum + random / (RAND_MAX / range);
  }
  else
  {
    return sample(minimum, maximum);
  }
}

int main(int argc, const char * argv[])
{
  srand(time(NULL));

  printf("%d", sample(1, 5));

  return 0;
}

/*
  Write a C function whose return value is an integer between one and seven:

  int main(int argc, const char * argv[])
  {
    srand(time(NULL));

    printf("%d", sample(1, 7));

    return 0;
  }
*/