XmasTree C++

CPPXmasTree.cpp

// CPPXmasTree.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
#include <ostream>
#include <string>

#include "XmasTree.h"

inline void printHelloWorld();

int main(int argc, char* argv[])
{
	//printHelloWorld();

	std::wcout << L"Enter odd number (tree's bottom length): ";
	std::wstring userInput;
	std::wcin >> userInput;

	int length = std::stoi(userInput);

	XmasTree tree = XmasTree();

	tree.drawTree(length);
	system("pause");
    return 0;
}

void printHelloWorld() 
{
	std::wstring helloWorld;

	helloWorld = L"hello, it's me";
	std::wcout << L"Please input an string and then press Enter: ";
	std::wstring noun;
	std::wcin >> noun;
	std::wcout << L"You entered '" << noun << L"'." << std::endl;
}

result.txt

     *
    ***
   *****
  *******
 *********
***********

XmasTree.cpp

#include "stdafx.h"
#include <iostream>
#include "XmasTree.h"

XmasTree::XmasTree() : m_length(7)
{
}

XmasTree::XmasTree(int length) : m_length(length)
{
}

XmasTree::~XmasTree()
{
}

void XmasTree::setLength(int length)
{
	m_length = length;
}

void XmasTree::drawTree(int length)
{
	std::wcout << L"Three length is: " << length << L" " << std::endl;
	std::wcout << L"Loops tree:" << std::endl;
	std::wcout << std::endl;
	loopsTree(length);
	std::wcout << L"Recursive tree:" << std::endl;
	recursiveTree(length);
}

void XmasTree::drawTree()
{
	drawTree(m_length);
}

void XmasTree::loopsTree(int length)
{
	int half = length / 2;
	for (int row = 0; row < half + 1; row++)
	{
		print((half - row), L" ");
		print((row * 2 + 1), L"*");

		std::wcout << std::endl;
	}
}

void XmasTree::recursiveTree(int length, int stars)
{
	int howManyStars = stars;
	int howManySpaces = (length - stars) / 2;

	print(howManySpaces, L" ");
	print(howManyStars, L"*");

	std::wcout << std::endl;

	if (stars < length)
	{
		recursiveTree(length, stars + 2);
	}
}

void XmasTree::print(int howMany, const wchar_t * chars)
{
	for (int i = 0; i < howMany; i++)
	{
		std::wcout << chars;
	}
}

XmasTree.h

#pragma once

class XmasTree
{
public:
	XmasTree();
	XmasTree(int length);
	~XmasTree();
	void setLength(int length);
	void drawTree(int length);
	void drawTree();

private:
	void loopsTree(int length);
	void recursiveTree(int length, int stars = 1);
	void print(int howMany, const wchar_t* chars);
	int m_length;
};