[C++知识库]编程模拟剪刀、石头和布游戏。游戏规则为：剪刀剪纸，石头砸剪刀，布包石头。玩游戏者从键盘输入s（表示剪刀）或r（表示石头）或p（表示布），要求两个游戏者交替输入，计算机给出输赢的信息。

#include<iostream>

using namespace std;

int main()

{
	char a, b;
	cout << "please the player A input" << endl;
	cin >> a ;
	cout << "please the player B input" << endl;
	cin >> b;

	if (a - b)
		switch (a - b)
		{
		case 1:	cout << "The winner is B" << endl; break;
		case 3:	cout << "The winner is A" << endl; break;
		case -1:cout << "The winner is A" << endl; break;
		case 2:	cout << "The winner is B" << endl; break;
		case -3:cout << "The winner is B" << endl; break;
		case -2:cout << "The winner is A" << endl; break;
		}
	else 
		cout << "平局" << endl;	
	return 0;	
}