题解 | #菱形图案#

#include <iostream>

using namespace std;

int main()
{
    int n;
    while (cin >> n)
    {
        for (int i = 0; i <= n; i++)
        {
            for (int j = 0; j < n - i; j++)
            {
                cout << " ";
            }
            for (int k = 0; k < i + 1; k++)
            {
                cout << "* ";
            }
            cout << endl;
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < i + 1; j++)
            {
                cout << " ";
            }
            for (int k = 0; k < n - i; k++)
            {
                cout << "* ";
            }
            cout << endl;
        }
    }
}