The C library function void srand(unsigned int seed) seeds the random number generator used by the function rand.
Following is the declaration for srand() function.
void srand(unsigned int seed)
seed − This is an integer value to be used as seed by the pseudo-random number generator algorithm.
This function does not return any value.
The following example shows the usage of srand() function.
#include <stdio.h> #include <stdlib.h> #include <time.h> int main () { int i, n; time_t t; n = 5; /* Intializes random number generator */ srand((unsigned) time(&t)); /* Print 5 random numbers from 0 to 50 */ for( i = 0 ; i < n ; i++ ) { printf("%d\n", rand() % 50); } return(0); }
Let us compile and run the above program that will produce the following result −
38 45 29 29 47