题解 | #牛牛的字符菱形#

#include<iostream>
using namespace std;

int main() {
    char ch;
    int line = 5;//总行数设为line，为奇数，此处为5
    int mid = (line + 1) / 2;//中间行设为mid

    cin >> ch;

    for (int i = 1; i <= line; i++) {
        for (int j = 1; j <= abs(i - mid); j++) { //第i行的空格数为 abs(i-mid)
            cout << " ";
        }
        for (int j = 1; j <= line - 2 * abs(i - mid);
                j++) { //第i行的字符数为 line-2*abs(i-mid)
            cout << ch;
        }
        cout << endl;
    }
}