C++实现简单贪吃蛇游戏

#ifndef _MAP_H_
#define _MAP_H_
#include <iostream>
#include "global.hpp"
#include "snake.hpp"

class map {
  private:
    char** _map;
    snake _snake;
    int height, width;
    std::list<point> foods;
  public:
    map();
    map(point initial_size, point initial_head,
    std::list<point> initial_foods);
    ~map();
    void move(direction d);
    void print();
    bool isGameOver();
    bool isEat();;
    void makemap(void);
};

map::map() {
  _map = NULL;
  height = width = 0;
}

void map::makemap() { // 这个是用来更新地图的
  for (int i = 0; i < height; i++) {
    for (int j = 0; j < width; j++)
      _map[i][j] = 0;
  }
  for (std::list<point>::iterator i = foods.begin(); i != foods.end(); ++i) {
    _map[i->x][i->y] = FOOD;
  }
  _map[_snake.getHead().x][_snake.getHead().y] = HEAD;
  for (std::list<point>::iterator i = _snake.getbody().begin();
  i != _snake.getbody().end(); ++i) {
    _map[i->x][i->y] = BODY;
  }
  for (int i = 0; i < height; i++) {
    for (int j = 0; j < width; j++) {
      if (_map[i][j] == 0)
        _map[i][j] = EMPTY;
    }
  }
}

map::map(point initial_size, point initial_head, std::list<point> initial_foods)
{
  height = initial_size.x;
  width = initial_size.y;
  _map = new char*[height];
  for (int i = 0; i < height; i++)
    _map[i] = new char[width]();
  _snake.setHead(initial_head);
  foods = initial_foods;
  makemap();
}

map::~map() {
  for (int i = 0; i < height; i++) {
    delete []_map[i];
  }
  delete []_map;
}

void map::print() {
  for (int i = 0; i < height; i++) {
    for (int j = 0; j < width; j++) {
      std::cout << _map[i][j];
    }
    std::cout << std::endl;    
  }
  std::cout << std::endl;
}

bool map::isGameOver() {
  point temp = _snake.getHead();
  if (temp.x == height || temp.y == width || temp.x < 0 || temp.y < 0)
    return true;
  if (_map[temp.x][temp.y] == BODY) return true;
  return false;
}

bool map::isEat() {
  point temp = _snake.getHead();
  if (temp.x == height || temp.y == width || temp.x < 0 || temp.y < 0)
    return false;
  if (_map[temp.x][temp.y] == FOOD) return true;
  else return false;
}

void map::move(direction d) {
  point temp_f = _snake.getHead();
  if (!(_snake.getbody().empty())) { // 为了避免追尾问题
    _map[_snake.getbody().back().x][_snake.getbody().back().y] = EMPTY;
  }
  _snake.getHead().move(d);
  if (_snake.getHead() == _snake.getbody().front()) { // 判断蛇是否往回走
    _snake.setHead(temp_f);
    _map[_snake.getbody().back().x][_snake.getbody().back().y] = BODY;
    return;
  }
  if (!isGameOver()) {
    if (isEat()) {
      point eaten = _snake.getHead();
      foods.remove(eaten);
      _snake.grow(temp_f);
    } else {
      _snake.getbody().push_front(temp_f);
      _snake.getbody().pop_back();
    }
    makemap();
  } else {
    if (!(_snake.getbody().empty())) {
      _map[_snake.getbody().back().x][_snake.getbody().back().y] = BODY;
    }
  }
}
#endif
								 
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