C++贪吃蛇——（2）

　　贪吃蛇第二部分，上下左右方法就不全部实现了。仅供参考，因为我也是参考了别人的代码来的...

　　

//
//  main.cpp
//  SnakeGame
//
//  Created by MadMarical on 15/11/26.
//  Copyright (c) 2015年 com. All rights reserved.
//

#include "Header.h"

using namespace std;

Game::Game()
{
for (int i = 0; i != n + 1; ++ i)
{
for (int j = 0; j != n + 1; ++ j)
{
map[i][j] = 0;
}
}
for (int i = 1; i != n; ++ i)
{
squence[i].x = 0;
squence[i].y = 0;
}
lenOfSnake = 1;
squence[lenOfSnake].x = 1;
squence[lenOfSnake].y = 1;

map[1][1] = 4;
direction = 4;

socre = 0;
}

void Game::Play()
{
cout<<"请输入游戏速度"<<endl;
cin>>snakeSpeed;

srand((unsigned int)time(0));

while (socre != 20)
{
eat = false;
while (true)
{
food.x = rand() % 20 + 1; //地图大小是21 * 21 随机数不能超过地图边界，为1到21之间的数
food.y = rand() % 20 + 1;
if (map[food.x][food.y] == 0)
{
break;
}
}
map[food.x][food.y] = 2;
system("cls");
Image();
while(!eat)
{
auto start = clock();
isOver = true;
while (!kbhit())
{
if (clock() - start <= snakeSpeed)
{
isOver = true;
}
else
{
isOver = false;
break;
}
}
if (isOver)
{
char c = getchar();
c = getchar();
switch (c)
{
case 'w':
direction = 1;
break;
case 's':
direction = 2;
case 'a':
direction = 3;
case 'd':
direction = 4;
default:
break;
}
}
Move(direction);
system("cls");
if (isOver)
{
Image();
cout<<"GG"<<endl;
}
Image();
}
socre ++;
}
cout<<"win"<<endl;
}

void Game::Image()
{
for (int j = 0; j != n + 1; ++ j)
{
cout<<"#";
}
cout<<endl;
for (int i = 1; i != n; ++ i)
{
for (int j = 0; j != n + 1; ++ j)
{
if (j == 0 || j == n + 1)
{
if (map[i][j] == 3)
{
cout<<"!!!";
}
else
{
cout<<"#";
}
}
else
{
if (map[i][j] == 1)
{
cout<<"*";
}
else if (map[i][j] == 2)
{
cout<<"@";
}
else if (map[i][j] == 3)
{
cout<<"!!!";
}
else if (map[i][j] == 4)
{
switch (direction)
{
case 1:
cout<<"30";
break;
case 2:
cout<<"31";
break;
case 3:
cout<<"17";
break;
default:
cout<<"16";
break;
}
}
else
{
cout<<" ";
}
}

}
cout<<endl;
}
for (int j = 0; j != n + 1; ++ j)
{
cout<<"#";
}
cout<<endl;

}
void Game::Move(int direction)
{
switch (direction)
{
case 1:
MoveUp();
break;
case 2:
MoveDown();
break;
case 3:
MoveLeft();
break;
default:
MoveRight();
}
}
void Game::MoveUp()
{
int i;
int x, y;
if (lenOfSnake > 1 && squence[lenOfSnake].y == squence[lenOfSnake - 1].y && squence[lenOfSnake].x == squence[lenOfSnake - 1].x + 1)
{ // 不能移动，则按原来的移动.
direction = 2; // 按原来的向下移动.
Move(direction);
return ;
}
// 开始移动．
x = squence[lenOfSnake].x - 1;
y = squence[lenOfSnake].y;
if (x == 0 || map[x][y] == 1)
{ // 撞到边界或者自己撞到自己.
map[x][y] = 3;
isOver = 1;
}
if (map[x][y] == 2)
{ // 说明已经吃到事物．
map[squence[lenOfSnake].x][squence[lenOfSnake].y] = 1;
lenOfSnake++;
squence[lenOfSnake].x = x;
squence[lenOfSnake].y = y;
map[x][y] = 4;
eat = true;
}
else
{
map[squence[1].x][squence[1].y] = 0;
for (i = 1; i <= lenOfSnake - 1; i++)
{
squence[i].x = squence[i + 1].x;
squence[i].y = squence[i + 1].y;
map[squence[i + 1].x][squence[i + 1].y] = 1;
}
squence[lenOfSnake].x = squence[lenOfSnake].x - 1;
if (isOver)
{
map[squence[lenOfSnake].x][squence[lenOfSnake].y] = 3;
}
else
{
map[squence[lenOfSnake].x][squence[lenOfSnake].y] = 4;
}
}
}
void Game::MoveDown()
{
}
void Game::MoveLeft()
{
}
void Game::MoveRight()
{
}
int main(int argc, const char * argv[])
{
Game A;
A.Play();
return 0;
}

View Code
反思：

1.conio.h并非标准库，所以如果在其他平台下运行，需要自己实现kbhit()的功能，这已经超出我的能力范围了。

2.编程风格必须在早期就坚持，不能说今天一个风格，明天另外一个风格。

3.看别人的源码再重编并不可耻，慢慢理解别人的代码，为什么要这么写然后自己在思考后重写就能提高能力。