Snake Game.cpp

#include<iostream>
#include<conio.h>
#include<windows.h>
using namespace std;
bool gameOver;
const int width = 20, height = 20;
int x, y,//head pos
    fruitX, fruitY, 
	score;
int tailX[100], tailY[100], nTail;
enum eDirection { STOP = 0, LEFT, RIGHT, UP, DOWN };
eDirection dir;
void setup() {
	gameOver = false;
	dir = STOP;
	x = width / 2;
	y = height / 2;
	fruitX = rand() % width;
	fruitY = rand() % height;
	score = 0;
}
void draw() {
	system("cls");//clear screan
	for (int i = 0; i < width + 2; i++)
		cout << "#";
	cout << endl;
	for (int i = 0; i < height; i++) {
		for (int j = 0; j < width; j++)
		{
			if (j == 0)cout << "#";

			if (i == y && j == x)
				cout << "o";
			else if (i == fruitY && j == fruitX)
				cout << "F";
			else {
				bool print = false;
				for (int k = 0; k < nTail; k++) {
					if (tailX[k] == j && tailY[k] == i) {
						cout << 'o'; print = true;
					}
				}
				if (!print)cout << " ";
			}
			if (j == width - 1)
				cout << "#";
		}
		cout << endl;
	}
	for (int i = 0; i < width + 2; i++)
		cout << "#";
	cout << endl;
	cout << "Score: " << score << endl;
}
void input() {
	if (_kbhit()) {
		switch (_getch()) {
		case 'a':
			dir = LEFT;
			break;
		case 'd':
			dir = RIGHT; break;
		case 'w':
			dir = UP; break;
		case 's':
			dir = DOWN; break;
		case 'x':
			gameOver = true; break;

		}
	}
}
void logic() {
	int prevX = tailX[0], prevY = tailY[0],
		prev2x, prev2y;
	tailX[0] = x; 
	tailY[0] = y;
	for (int i = 1; i < nTail; i++) {
		prev2x = tailX[i];
		prev2y = tailY[i];
		tailX[i] = prevX;
		tailY[i] = prevY;
		prevX = prev2x;
		prevY = prev2y;
	}

		switch (dir) {
		case LEFT:
			x--;
			break;
		case RIGHT:
			x++; break;
		case UP:
			y--; break;
		case DOWN:
			y++; break;
		default:
			break;
		}
		if (x >= width)
			x = 0;
		else if (x < 0)
			x = width - 1;

		if (y >= height)
			y = 0;
		else if (y < 0)
			y = height - 1;

		for (int i = 0; i < nTail; i++)
			if (tailX[i] == x && tailY[i] == y)gameOver = true;

		if (x == fruitX && y == fruitY) {
			score += 10;
			fruitX = rand() % width;
			fruitY = rand() % height;
			nTail++;
	}

}
int main() {
	setup();
	while (!gameOver) {
		draw();
		input();
		logic();
		Sleep(10);
	}

}