Program Pola Bintang Belah Ketupat dengan C++

#include <iostream>
using namespace std;

int main() {
    int rows, i, j, space;

    cout << "Masukkan jumlah baris: ";
    cin >> rows;

    space = rows - 1;

    for (j = 1; j <= rows; j++) {
        for (i = 1; i <= space; i++) {
            cout << " ";
        }
        space--;

        for (i = 1; i <= 2 * j - 1; i++) {
            cout << "*";
        }
        cout << endl;
    }

    space = 1;

    for (j = 1; j <= rows - 1; j++) {
        for (i = 1; i <= space; i++) {
            cout << " ";
        }
        space++;

        for (i = 1; i <= 2 * (rows - j) - 1; i++) {
            cout << "*";
        }
        cout << endl;
    }

    return 0;
}