#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();

}