HDU_1736 美观化文字

一道大水题，居然放了好几个星期才过，无语。。。。

#include <stdio.h>
#include <string.h>
int main()
{
    char s[100000], tmp[3];
    while(gets(s) != NULL)
    {
        int i = 0, flag = 0;
        tmp[2] = 0;
        while(s[i])
        {
            tmp[0] = s[i]; tmp[1] = s[i+1];
            if(!strcmp(tmp, "“") || !strcmp(tmp, "”"))
                flag = !flag;
            switch(s[i])
            {
                case '.':printf("。");break;
                case ',':printf("，");break;
                case '?':printf("？");break;
                case '!':printf("！");break;
                case '<':if(s[i+1] == '<')
                         {printf("《");i++;}
                         else    printf("<");break;
                case '>':if(s[i+1] == '>')
                         {printf("》");i++;}
                         else    printf(">");break;
                case '"':if(flag)printf("”");
                         else printf("“");
                         flag = !flag; break;
                default:printf("%c",s[i]);
            }
            i++;
        }
        printf("\n");
    }
    return 0;
}