#include <iostream>
   using namespace std;
   class Triangle
   {
   public:
     Triangle(int width, int height)
     : width(width), height(height / 2)
     {  }
     void draw()
     {
       int start_offset = width / 2;
       int end_offset = 0;
       for (int row = 0; row < height; ++ row) {
         int bgratio = (end_offset - start_offset) * row / height +
   start_offset;
         lineOf(' ', bgratio - 1);
         cout << '*';
         lineOf(row + 1 < height ? ' ' : '*', width - bgratio * 2);
         cout << '*' << endl;
       }
     }
   private:
     int width, height;
     void lineOf(char ch, int count)
     {
       for(; count; -- count)
         cout << ch;
     }
   };
   int main()
   {
     Triangle triangle(16,16);
     triangle.draw();
   }