C++输出以下图案 * *** ***** ******* ***** *** *

以下是C++输出该图案的代码：

#include <iostream>
using namespace std;

int main() {
    int n;
    char c;
    cout << "How many lines? ";
    cin >> n;
    cout << "What character? ";
    cin >> c;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= 2 * n - 1; j++) {
            if (j <= n - i || j >= n + i) {
                cout << " ";
            } else {
                cout << c;
            }
        }
        cout << endl;
    }
    for (int i = n - 1; i >= 1; i--) {
        for (int j = 1; j <= 2 * n - 1; j++) {
            if (j <= n - i || j >= n + i) {
                cout << " ";
            } else {
                cout << c;
            }
        }
        cout << endl;
    }
    return 0;
}