contoh algoritma segitiga pascal

#include<iostream.h>

#include<conio.h>

int main()

{

    int nilai,a;

    cout<<"======= Segitiga pascal ======="<<endl;

    cout<<endl;

    cout << "Masukan banyaknya angka = ";

    cin >> nilai;

    cout<<endl;

    for (int x=0; x<=nilai; x++)

    {

        for(int y=nilai;y>x;y--)

        {

            cout << "  ";

        }

        for (int z=0; z<=x; z++)

        {

            if (z==0||x==z)

            { a=1; }

            else

            {a = a * (x+1-z)/z;}

            cout << " " << a <<"  ";

        }

        cout << "\n";

    }

    getch();

}