如下C++代码执行时如输入 5 ，将输出代码后的字符图形

int n;
cin >> n;
for (int i = 1; i < n + 1; i++) {
    for (int j = 1; j < n - i + 1; j++)
        cout << 0;
    for (int k = 1; k < 2 * i; k++) {
        if (k <= i)
            cout << k;
        else
            cout << 2 * i - k;
    }
    for (int j = 1; j < n - i + 1; j++)
        cout << 0;
    cout << endl;
}

000010000
000121000
001232100
012343210
123454321