diamond.cpp

#include <bits/stdc++.h>
using namespace std;

int main()
{
    int n = 5;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n - i; j++)
            cout << " ";
        for (int j = 1; j <= 2 * i - 1; j++)
            cout << "*";

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

        cout << endl;
    }
}