大佬求救，为什么Switch会跳不出去，这是什么错误啊

Question

#include<iostream>
#include<vector>
#include<string>
using namespace std;
void display(char n) {
    char a[4][6];
    switch (n-'0') {
    case 0:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if (j == 2 && ((i != 1) && (i != 5))) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 1:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if (j == 3) a[i][j] = 'X';
                else a[i][j] = '.';
            }
        }break;
    case 2:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if ((i == 2 && j != 3) || (i == 4 && j != 1)) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 3:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if ((i == 2 && j != 3) || (i == 4 && j != 3)) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 4:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if ((j == 2 && i != 3) || (i == 4 && j != 3) || (i == 5) && (j != 3)) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 5:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if ((i == 2 && j != 1) && (i == 4 && j != 3)) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 6:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if ((i == 2 && j != 1) && (i == 4 && j == 2)) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 7:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if (i == 1 || j == 3) a[i][j] = 'X';
                else a[i][j] = '.';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 8:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if ((i == 2 && j == 2) || (i == 4 && j == 2)) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    case 9:
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                if ((i == 2 && j == 2) || (i == 4 && j != 3)) a[i][j] = '.';
                else a[i][j] = 'X';
            }
        }
        for (int i = 1; i < 6; i++) {
            for (int j = 1; j < 4; j++) {
                cout << a[i][j];
            }
            cout << '\n';
        }
        break;
    }
}
int main() {
    int x;
    string s;
    cin >> x;
    cin >> s;
    for (int i = 0; i < s.size(); i++) {
        display(s[i]);
    }
    return 0;
}

Answer 1

看你 a 的定义 以及后面 i j 的范围，很明显 i应该小于 4的，你的 i <6 数组访问越界了