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Initialize random number generator how to use randsrand

#include <stdio.h> #include <stdlib.h> #include <time.h> int main () { /* initialize random generator */ srand ( time(NULL) ); /* generate random numbers */ printf ("A number between 0 and 50: %d\n", rand() % 50); printf ("A number between 25 and 45: %d\n", rand() % 20 + 25); return 0; }