Octogan.cpp

//Printing Octogan pattern

#include <iostream>
using namespace std;

int main()
{
     int side,line=1,star=1,space=1,no_of_spaces,no_of_stars;

     cout << "Enter length of the side of the Octagon: ";
     cin >> side;

     cout << "\n\n";

     no_of_spaces = side;
     no_of_stars = side;

     for (line = 1; line <= side; line++){

           for (space = 1; space<no_of_spaces; space++)
                cout << " ";

           for (star = 1; star <= no_of_stars; star++)
                cout << "*";

           no_of_spaces--;
           no_of_stars += 2;

           cout << endl;
     }

     no_of_stars -= 2;

     for (line = 1; line<side; line++){

           for (star = 1; star <= no_of_stars; star++)
                cout << "*";

           cout << endl;
     }

     no_of_spaces = 1;
     no_of_stars -= 2;

     for (line = 1; line<side; line++){

           for (space = 1; space <= no_of_spaces; space++)
                cout << " ";

           for (star = 1; star <= no_of_stars; star++)
                cout << "*";

           no_of_spaces++;
           no_of_stars -= 2;

           cout << endl;
     }

     cout << "\n\n";
     return 0;
}