1090-Rock, Paper, Scissors

描述

Rock, Paper, Scissors is a classic hand game for two people. Each participant holds out either a fist (rock), open hand (paper), or two-finger V (scissors). If both players show the same gesture, they try again. They continue until there are two different gestures. The winner is then determined according to the table below: Rock beats Scissors    Paper beats Rock   
Scissors beats Paper  Your task is to take a list of symbols representing the gestures of two players and determine how many games each player wins. In the following example:

Turn     : 1 2 3 4 5

Player 1 : R R S R S

Player 2 : S R S P S

Player 1 wins at Turn 1 (Rock beats Scissors), Player 2 wins at Turn 4 (Paper beats Rock), and all the other turns are ties.

输入

The input contains between 1 and 20 pairs of lines, the first for Player 1 and the second for Player 2. Both player lines contain the same number of symbols from the set {'R', 'P', 'S'}. The number of symbols per line is between 1 and 75, inclusive.  A pair of lines each containing the single character 'E' signifies the end of the input.

输出

For each pair of input lines, output a pair of output lines as shown in the sample output, indicating the number of games won by each player.

样例输入

RRSRS

SRSPS

PPP

SSS

SPPSRR

PSPSRS

E

E

样例输出

P1: 1

P2: 1

P1: 0

P2: 3

P1: 2

P2: 1

#include<iostream>
#include<string>
using namespace std;

void compare(char a,char b,int &count1,int &count2)
{
    if(a=='R')
    {
        if(b=='S') count1++;
        if(b=='P') count2++;
    }
    if(a=='P')
    {
        if(b=='R') count1++;
        if(b=='S') count2++;
    }
    if(a=='S')
    {
        if(b=='P') count1++;
        if(b=='R') count2++;
    }
}
int main()
{
    string s1,s2;
    while(cin>>s1>>s2&&(s1!="E"&&s2!="E"))
    {
        int len=s1.length();
        int i;
        int count1=0;
        int count2=0;
        for(i=0;i<len;i++)
        {
            compare(s1[i],s2[i],count1,count2);
        }
        cout<<"P1: "<<count1<<endl;
        cout<<"P2: "<<count2<<endl;
    }
    return 0;
}