UVa 489

题意：猜测单词，输入三行第一行是输入时第几次，第二行是要猜的单词，第三行是猜测的单词。

注意：重复猜测认为错误。

#include<stdio.h>
#include<string.h>
#define Maxn 100
int left ,chance;  //left 是需要判断总字母数，chance 是有7次错误的机会
int win ,lose;
char s1[Maxn],s2[Maxn];
void guess(char ch)
{
    int bad = 1;  //记录ch是否在s1 出现
    int s = strlen(s1);
    for(int i = 0;i < s; i++)
        if(s1[i] == ch)
        {
            s1[i] = ' '; //可以判断第二次重复猜测的字母
            left--;
            bad = 0;
        }
    if(bad) chance--; //没出现就错
    if(!chance) lose = 1;
    if(!left) win = 1;
}
int main()
{
    int n;
    while(scanf("%d%s%s",&n,s1,s2) != EOF && n != -1)
    {
        printf("Round %d\n",n);
        left = strlen(s1);
        chance = 7;
        win = lose = 0;
        int s = strlen(s2);
        for(int i = 0;i < s; i++)
        {
            guess(s2[i]);
            if(win || lose) break;
        }
        if(win)
            printf("You win.\n");
        else
            if(lose)
            printf("You lose.\n");
        else
            printf("You chickened out.\n");
    }
    return 0;
}