Generating random numbers

A program showing the generation of random numbers with proper initialization using the system clock.

/* The random [rand()] function */ #include <stdio.h> #include <time.h> #include <stdlib.h> int main (void) { /* initialize random generator */ srand (time(NULL)); /* generate random numbers */ printf("RAND_MAX = %d\n", RAND_MAX); printf ("A number between 0 and RAND_MAX : %d\n", rand()); printf ("A number between 0 and 99: %d\n", rand() % 100); printf ("A number between 0 and 9: %d\n", rand() % 10); printf ("A number between 1 and 6: %d\n", (rand() % 6) + 1); return (0); } Legend: preprocessor directives | variable declarations | main program | helper functions | user-defined structures | comments

RAND_MAX = 32767 A number between 0 and RAND_MAX : 10746 A number between 0 and 99: 43 A number between 0 and 9: 8 A number between 1 and 6: 2