Star patterns in C++

#include<iostream>

using namespace std;

int main()

{

int n, s, i, j;

cout << "Enter number of rows: ";

cin >> n;

for(i = 1; i <= n; i++)

{

for(s = i; s < n; s++)

{

cout << " ";

}

for(j = 1; j <= (2 * i - 1); j++)

{

cout << "*";

}

cout << "\n";

}

}