random2.c

C.Game.Programming.For.Dummies原码

#include <stdio.h>
#include <stdlib.h>

int rnd(void);
void seedrnd(void);

void main()
{
	int x;
	seedrnd();		//prepare random number gen.
				//display 100 random numbers
	for(x=0;x<100;x++)
		printf("%i\t",rnd());
}

int rnd(void)
{
	int r;

	r=rand();		//spit up random num.
	return(r);
}

void seedrnd(void)		//seed the random number
{
	unsigned seed;
	char s[6];

	printf("Enter a random number seed:");
	seed=(unsigned)atoi(gets(s));

	srand(seed);
}