Snake with Menu.cpp

#include <iostream>
#include <vector>
#include <iostream>
#include <conio.h>
#include <time.h>
#include <string>

#include "ConsoleGaming.h"

using namespace std;

HANDLE consoleHandle;

typedef vector<GameObject>::iterator randomAccess_iterator;
typedef vector<GameObject>::const_iterator const_iterator;

// Window constants
const int WindowWidth = 70;
const int WindowHeight = 30;
// Snake
const int SnakeSpeed = 1;
const int SnakeStartingLength = 5;
const char SnakeSymbol = '*',
	//Fruit
		FruitSymbol = '+';
// Game variables
unsigned long sleepDuration = 200;
const int ESC = 27;
vector<GameObject> snake;
vector<GameObject> fruit;

COORD direction = { 1, 0 };

void Update()
{
	// Save the tail, we might need it later.
	GameObject tail = *(snake.end() - 1);

	for (randomAccess_iterator i = snake.end() - 1; i != snake.begin(); --i)
	{
		GameObject next = *(i - 1);
		i->UpdateCoordinates(next.Coordinates);
	}

	if (kbhit())
	{
		char key = getch();
		switch (key)
		{
		case 'a':
			direction.X = -SnakeSpeed;
			direction.Y = 0;
			break;
		case 'w':
			direction.X = 0;
			direction.Y = -SnakeSpeed;
			break;
		case 'd':
			direction.X = SnakeSpeed;
			direction.Y = 0;
			break;
		case 's':
			direction.X = 0;
			direction.Y = SnakeSpeed;
			break;
		};
	}

	snake.begin()->Coordinates.X += direction.X;
	snake.begin()->Coordinates.Y += direction.Y;

	GameObject head = *snake.begin();
	for (randomAccess_iterator i = fruit.begin(); i != fruit.end(); ++i)
	{
		if (head.Coordinates.X == i->Coordinates.X && head.Coordinates.Y == i->Coordinates.Y)
		{
			// Remove the old fruit, increase the snake's size
			fruit.erase(i);
			snake.push_back(tail);

			// Add a new fruit
			int x = rand() % WindowWidth;
			int y = rand() % WindowHeight;
			fruit.push_back(GameObject(x, y, FruitSymbol));

			sleepDuration *= (sleepDuration > 50) * 0.1 + 0.9;
			// Break, since you can't eat more than one fruit at the same time.
			break;
		}
	}
}

void Draw()
{
	ClearScreen(consoleHandle);

	for (const_iterator snakeBody = snake.begin(); snakeBody != snake.end(); ++snakeBody)
	{
		snakeBody->Draw(consoleHandle);
	}

	for (const_iterator singleFruit = fruit.begin(); singleFruit != fruit.end(); ++singleFruit)
	{
		singleFruit->Draw(consoleHandle);
	}

}

void CenterString(string s);
void GameInstructions();
void DisplayHighestScore();
int QuitGame();

void Menu()
{
	CenterString("Welcome to Snake Game 1.0!\n\n");
	CenterString("Choose action:\n");
	CenterString("1. Play New Game\n");
	CenterString("2.See Game Instructions\n");
	CenterString("3. See Highest Score\n");
	CenterString("4.Exit Game\n\n");
	
	char k = getch();
	switch(k)
	{
	case '1':
		system("CLS");
			while (true)
			{
				Update();
				Draw();
				Sleep(sleepDuration);
			}
			break;
	case '2':
		system("CLS");
			GameInstructions();
			break;
	case '3':
		system("CLS");
			DisplayHighestScore();
			break;
	case '4':
			QuitGame();
	}
}


int main()
{
	consoleHandle = GetStdHandle( STD_OUTPUT_HANDLE );
	// Randomize stuff
	srand(time(NULL));

	for (int i = SnakeStartingLength; i > -1; --i)
	{
		snake.push_back(GameObject(i, 0, SnakeSymbol));
	}

	int x = rand() % WindowWidth;
	int y = rand() % WindowHeight;
	fruit.push_back(GameObject(x, y, FruitSymbol));

	Menu();

	return 0;
}

void CenterString(string str)
{
	int l = str.length();
	int pos = (int)((WindowWidth - l)/2);
	for (int i = 0; i < pos; ++i)
		cout << " ";
	cout << str;
}

void GameInstructions()
{
	CenterString("Here are the rules:\n\n");
	CenterString("You control the snake.\n");
	CenterString("When it eats one of the fruits, the snake grows bigger.\n");
	CenterString("Your goal is to grow as big as possible.\n");
	CenterString("If you ...... you die.\n\n");
	CenterString("To go FORWARD press 'w'\n");
	CenterString("To go BACK press 's'\n");
	CenterString("To go RIGHT press 'd'\n");
	CenterString("To go LEFT press 'a'\n\n");
	CenterString("Press 'ESC' to get back to the main menu\n");
	char k = getch();
	if (k == ESC)
	{
		system("CLS");
		Menu();
	}
}

void DisplayHighestScore()
{
	//must add later
	cout << "Highest score: .... \n";
	CenterString("Press 'ESC' to get back to the main menu\n");

	char k = getch();
	if (k == ESC)
	{
		system("CLS");
		Menu();
	}
}

int QuitGame()
{
	return 0;
}