poj1488

简单题

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
using namespace std;

int main()
{
    //freopen("t.txt", "r", stdin);
    char ch;
    bool first = true;
    while ((ch = getchar()) != EOF)
    {
        if (ch == '"')
        {
            if (first)
            {
                printf("``");
                first = false;
            }else
            {
                printf("''");
                first = true;
            }
        }else
        {
            putchar(ch);
        }
    }
    return 0;
}