Program Segitiga Bintang di C++

#include<iostream.h>
#include<conio.h>

int main()
{
int a,b,c;

cout<<"tinggi segitiga = ";cin>>a;
cout<<endl;
for(b=1;b<=a;b++)

{
for(c=1;c<=b;c++)
cout<<"*";
cout<<endl;
}
getch();
}