// Basic random numbers

#include <stdio.h>       // for printf()
#include <stdlib.h>      // for atol() and rand()
#include <time.h>        // for time()

int main(int argc, char* argv[]){

	if( argc == 1 ){
		// if no extra command line arguments
 		// randomly seed the prng
		srand(time(NULL));

	}else{
		// use the command line argument
		// as the seed
		srand( atol(argv[1]) );
	}

	printf("first random number is %d\n", rand());


 return 0;
}