Out put will be like above stars:
Here is the code.
#include<iostream>
#include<iomanip>
using namespace std;
int main()
{
int i, j, n=40;
for(i=1; i<=40; i=i+2)
{
cout<<endl<<setw(n);
n--;
for(j=1; j<=i; j++)
cout<<"*";
}
cout<<endl<<endl<<endl<<endl;
system("pause");
return 0;
}