#include <cstdlib>
    void srand( unsigned seed );

The function srand() is used to seed the random sequence generated by rand(). For any given seed, rand() will generate a specific “random” sequence over and over again.

     srand( time(NULL) );
     for( i = 0; i < 10; i++ )
       printf( "Random number #%d: %d\n", i, rand() );

Related Topics: rand, (Standard C Date & Time) time