为啥这个过不了啊

// NOI.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include <iostream>
#include <cmath>
#include <string>

using namespace std;

int main()
{
    int x, y, g;
    char charest;
    cin >> x >> y >> charest >> g;
    string stuff(x, charest);
    cout << stuff << endl;
    if (g == 0) {
        string middle((x - 2), ' ');
        for (int i = 0; i < y - 2; i++)
            cout << charest << middle << charest << " " << endl;
        cout << stuff << endl;
    }
    else {
        for (int i = 0; i < y - 2; i++)
            cout << stuff << endl;
    }
    cout << endl;
    return 0;
}