functions.h

#include <stdio.h>
#include <Windows.h>
#include <conio.h>
#include "types.h"

#define width 25
#define height 16

TypeFood food;
TypeSnake snake;
TypeTail tail[100];

int i = 1;

char map[height - 1][width + 1];

int foodCounter = 0;

char key;

int direction;

int game = 0;

void gameOver()
{
	system("cls");
	game = 1;

	printf("       GAME OVER\n\n\n\n");
}

void initmap() {

	for (int i = 0; i < width; i++)
	{
		map[0][i] = '#';
		map[0][width] = '\0';
	}
	strncpy(map[1], map[0], width + 1);

	for (int i = 1; i < width - 1; i++)
	{
		map[1][i] = ' ';
	}
	for (int i = 1; i < height - 2; i++)
	{
		strncpy(map[i], map[1], width + 1);
	}
	for (int i = 0; i < width; i++)
		map[height - 2][i] = '#';
}

void showMap() {

	for (int i = 0; i < height - 1; i++) {

		printf("%s\n", map[i]);
	}
}

int noblock() {
	if (_kbhit())
		return _getch();
	else return -1;
}

void moveSnakeAndTail() {

	key = noblock();

	tail[0].buftailx = snake.head_x;
	tail[0].buftaily = snake.head_y;

	for (int i = 1; i < foodCounter; i++) {

		tail[i + 1].buftailx = tail[i].tail_x;
		tail[i + 1].buftaily = tail[i].tail_y;
	}

	if ((key == 'w' || key == 's' || key == 'a' || key == 'd') && (abs(direction - key) > 5))
		direction = key;

	if (direction == 'w')
		snake.head_y--;

	if (direction == 's')
		snake.head_y++;

	if (direction == 'a')
		snake.head_x--;

	if (direction == 'd')
		snake.head_x++;

	if (snake.head_x >= 24)
		snake.head_x = 1;

	if (snake.head_x <= 0)
		snake.head_x = 23;

	if (snake.head_y >= 14)
		snake.head_y = 1;

	if (snake.head_y <= 0)
		snake.head_y = 13;
}

void initSnakeAndTail() {

	snake.head_x = width / 2;
	snake.head_y = height / 2;
}

void putSnake() {

	map[snake.head_y][snake.head_x] = 'S';
}

void initFood() {

	food.pos_x = 5;
	food.pos_y = 5;
}

void putFoodAndTail() {

	map[food.pos_y][food.pos_x] = '*';

	if ((snake.head_x == food.pos_x) && (snake.head_y == food.pos_y))
	{
		food.pos_x = 1 + rand() % 23;
		food.pos_y = 1 + rand() % 13;
		foodCounter++;

	}
	for (int i = 0; i < foodCounter; i++) {

		tail[i + 1].buftailx = tail[i].tail_x;
		tail[i + 1].buftaily = tail[i].tail_y;

		tail[i].tail_x = tail[i].buftailx;
		tail[i].tail_y = tail[i].buftaily;

		map[tail[i].tail_y][tail[i].tail_x] = 's';
	}
	if (map[snake.head_y][snake.head_x] == map[tail[i].tail_y][tail[i].tail_x])
		gameOver();
}