poj1013 [enumeration]

#include <iostream>
#include <cstdio>
#include <string.h>
#include <math.h>
#include <cstring>
#include <cstdlib>
#define NUll 0//null没有这个关键字 事先定义;
using namespace std;
char Left[3][7];//左天平,这里用大写是防止和库里的函数重名;
char Right[3][7];//右天平
char result[3][7];//测量结果
bool isfake(char c,bool light);//判断这个硬币的函数;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
    	for (int i = 0; i < 3; ++i)
    	{
    		cin>>Left[i]>>Right[i]>>result[i];
    	}
    	for (char i='A';i<='L';++i)//枚举每一种硬币
    	{
    		if(isfake(i,true))//假设这个硬币是轻的;
    		{
    			printf("%c is the counterfeit coin and it is light.\n",i);
    			break;
    		}
    		else if(isfake(i,false))//假设这个硬币是重的
    		{
    			printf("%c is the counterfeit coin and it is heavy.\n",i);
    			break;
    		}
    	}
    }
	return 0;
}
bool isfake(char c,bool light)//用light表示TRUE;heavy表示false;
{
	char *pleft,*pright;//定义一个指向天平的指针;
	for (int i = 0; i < 3; ++i)
	{
		if (light)
		{
			pleft=Left[i];
			pright=Right[i];
		}
		else 
		{//如果是false 将天平进行交换;
			pleft=Right[i];
			pright=Left[i];			
		}
		if(result[i][0]=='u')
		{
			if(strchr(pright,c)==NUll){return false;break;}//比较字符串中是否有这个硬币;
		}
		else if(result[i][0]=='e')
		{
			if(strchr(pleft,c)||strchr(pright,c)){return false;break;}//如果even 两边都不会有这个硬币
		}
		else if(result[i][0]=='d')
		{
			if(strchr(pleft,c)==NUll){return false;break;}
		}
	}
	return true;
}
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Origin blog.csdn.net/qq_42825058/article/details/84961726