butterfly pattern in c++
#include <iostream>
using namespace std;
int main()
{
int n;
cin >> n;
for (int i = n; i >= 1; i++)
{
for (int j = 1; j <= i; j++)
{
cout<<"*";
}
int space = 2*n -2*i;
for (int j = 1; j <= space; j++)
{
cout << " ";
}
for (int j = 1; j <= i; j++)
{
cout << "*";
}
cout<<endl;
}
return 0;
}