大大维的贪吃蛇v1

本文为大大维原创，最早于博客园发表，转载请注明出处！！！

虽然本人一直是个免费的游戏测试员（/手动滑稽），但一直有着一个游戏架构师的梦想。正如马爸爸所说，梦想还是要有的，万一实现了呢？

这些天放寒假，有些空闲时间，就想着做一个简单的游戏机。能达到小时候十几块钱买的那种小霸王的功能就差不多了（有贪吃蛇，赛车小游戏，俄罗斯方块，雷霆战机，坦克大战，2048，拼图等），好吧，原谅我有些浮夸风（/手动斜眼）。。。

这不，下面是我这两天抠出来的一个最简单的贪吃蛇小游戏，姑且叫它“大大维的贪吃蛇v1”吧！！！

游戏功能比较简单，后续还需要完善。先将代码在这保存一份，日后看看，也是一件挺有意思的事情吧！！！

 /**--------------------------------------------------**/
 /**名称：大大维的贪吃蛇v1             日期:2017/1/22**/
 /**描述：实现了贪吃蛇的基本功能，可以调节游戏难度，**/
 /**做了一个简单的用户界面                           **/
 /**存在的问题：由于使用了全局数组存贮，因此对Space **/
 /**类的封装有些欠缺；由于使用了全局刷新，游戏运行中**/
 /**会出现闪屏现象，游戏难度越高，闪动越严重；不能够**/
 /**存储玩家的游戏记录，由于不是图形化界面，用户界面**/
 /**较丑;不能改变游戏的地图大小                      **/
 /**笔者会在后续版本逐步完善这些问题!!!              **/
 /**--------------------------------------------------**/

 #include<iostream>
 #include<ctime>
 #include<cstdlib>
 #include<cstdio>
 #include<conio.h>
 #include<windows.h>
 using namespace std;
 const int SpaceLENG=;
 const int SpaceHIGH=;
 const int HARDSPEED=;
 const int NOMALSPEED=;
 const int EASYSPEED=;
 int speed=NOMALSPEED;
 bool FLAG=true;
 enum dir {UP,DOWN,LEFT,RIGHT};///使用小写会引发歧义
 enum level {HARD,ESAY,NOMAL};
 ///----------------------------------------------------
 ///游戏空间定义
 class Space
 {
 public:
     void InitSpace();
     void DisplaySpace();
 public:
     char SpaceData[SpaceLENG+][SpaceHIGH+];
 };
 void Space::InitSpace()
 {
     for(int i=-; i<SpaceLENG+; i++)
         for(int j=-; j<SpaceHIGH+; j++)
         {
             if(i<||i==SpaceLENG||j<||j==SpaceHIGH)
                 SpaceData[i][j]='#';
             else
                 SpaceData[i][j]=' ';
         }
 }
 void Space::DisplaySpace()
 {
     for(int i=-; i<SpaceLENG+; i++)
     {
         for(int j=-; j<SpaceHIGH+; j++)
         {
             cout<<SpaceData[i][j];
         }
         cout<<endl;
     }
     cout<<endl<<endl;
 }
 Space *spa=new Space();
 ///----------------------------------------------------
 ///蛇节点定义
 class SnakeNode
 {
 public:
     void setXY(int m,int n)
     {
         x=m;
         y=n;
     }
     void setNext(SnakeNode *temp)
     {
         next=temp;
     }
     void setPrior(SnakeNode *temp)
     {
         prior=temp;
     }
     int getX()
     {
         return x;
     }
     int getY()
     {
         return y;
     }
     SnakeNode* getNext()
     {
         return next;
     }
     SnakeNode* getPrior()
     {
         return prior;
     }
 private:
     int x,y;
     SnakeNode *prior,*next;
 };
 ///----------------------------------------------------
 ///食物定义
 class Food
 {
 public:
     void foodCreate()
     {
         bool flag=true;
         while(flag)
         {
             srand((unsigned int)time(NULL));
             fx=rand()%SpaceLENG;
             fy=rand()%SpaceHIGH;
             if(spa->SpaceData[fx][fy]!='*')
                 flag=false;
         }

         spa->SpaceData[fx][fy]='$';
     }
     int getFx()
     {
         return fx;
     }
     int getFy()
     {
         return fy;
     }
 private:
     int fx;
     int fy;
 };
 ///----------------------------------------------------
 ///蛇定义
 class Snake:public SnakeNode,public Food
 {
 public:
     Snake()
     {
         addHead(SpaceLENG/,SpaceHIGH/);
         addHead(SpaceLENG/,SpaceHIGH/-);
         addHead(SpaceLENG/,SpaceHIGH/-);
     }
     void addHead(int x,int y);
     void delTail();
     void moving();
     void changePoint(char keydown);
     SnakeNode* getHead()
     {
         return head;
     }
     SnakeNode* getTail()
     {
         return tail;
     }
     int getLEN()
     {
         return LEN;
     }
 private:
     SnakeNode *head=NULL,*tail=NULL;
     int LEN=;
     dir point=LEFT;
 };
 void Snake::addHead(int x,int y)
 {
     SnakeNode *temp=new SnakeNode();
     temp->setXY(x,y);
     temp->setNext(head);
     temp->setPrior(NULL);
     if(head)
     {
         head->setPrior(temp);///如果头不为空
         spa->SpaceData[head->getX()][head->getY()]='*';///旧头
     }
     head=temp;
     if(!tail)tail=head;///如果尾为空
     spa->SpaceData[head->getX()][head->getY()]='@';///新头
     LEN++;
 }
 void Snake::delTail()
 {
     SnakeNode *temp=tail;
     spa->SpaceData[tail->getX()][tail->getY()]=' ';
     if(tail==head)
         tail=head=NULL;
     else
     {
         tail=tail->getPrior();
         tail->setNext(NULL);
         LEN--;
     }
     delete temp;

 }
 void Snake::moving()
 {
     int a,b;
     SnakeNode* temp=getHead();
     a=temp->getX();
     b=temp->getY();
     switch(point)
     {
     case UP:
         --a;
         break;
     case DOWN:
         ++a;
         break;
     case LEFT:
         --b;
         break;
     case RIGHT:
         ++b;
         break;
     }
     ///撞墙
     if(a==SpaceLENG||b==SpaceHIGH||a==-||b==-)
     {
         FLAG=false;
     }
     ///撞自己身体
     if(spa->SpaceData[a][b]=='*')
     {
         spa->SpaceData[a][b]=='@';///用头结点覆盖相撞节点
         FLAG=false;
     }
     ///吃食物
     if(a==getFx()&&b==getFy())
     {
         addHead(a,b);
         foodCreate();
     }
     ///普通移动
     else
     {
         addHead(a,b);
         delTail();
     }
 }
 void Snake::changePoint(char keydown)///方向控制
 {
     switch(keydown)
     {
     case 'w':
     {
         if(point!=DOWN)
         {
             point=UP;
             break;
         }
         else break;
     }
     case 'W':
     {
         if(point!=DOWN)
         {
             point=UP;
             break;
         }
         else break;
     }
     case 's':
     {
         if(point!=UP)
         {
             point=DOWN;
             break;
         }
         else break;
     }
     case 'S':
     {
         if(point!=UP)
         {
             point=DOWN;
             break;
         }
         else break;
     }
     case 'a':
     {
         if(point!=RIGHT)
         {
             point=LEFT;
             break;
         }
         else break;
     }
     case 'A':
     {
         if(point!=RIGHT)
         {
             point=LEFT;
             break;
         }
         else break;
     }
     case 'd':
     {
         if(point!=LEFT)
         {
             point=RIGHT;
             break;
         }
         else break;
     }
     case 'D':
     {
         if(point!=LEFT)
         {
             point=RIGHT;
             break;
         }
         else break;
     }
     }
 }
 ///----------------------------------------------------
 ///用户交互界面创建
 class UserView
 {
 public:
     int menuCreate();
     int gameSetting();
 };
 int UserView::menuCreate()
 {
     bool flag=true;
     while(flag)
     {
         cout<<"                 MENU"<<endl<<endl;
         cout<<"Instruction:"<<endl<<endl;
         cout<<"The Snake's original length is 3."<<endl<<endl;
         cout<<"Using 'w,s,a,d' or 'W,S,A,D' to control the direction."<<endl<<endl<<endl<<endl;
         cout<<"Please Input 'Y'or'y' to start game;"<<endl;
         cout<<"Please Input 'N'or'n' to end game;"<<endl;
         cout<<"Please Input 'S'or's' to game setting;"<<endl;
         cout<<"Please Input else to stay!"<<endl;
         char startKey=getch();
         if(startKey=='N'||startKey=='n')
         {
             system("cls");
             cout<<"Good Bye!!!"<<endl;
             exit();
         }
         else if(startKey=='Y'||startKey=='y')
         {
             system("cls");
             cout<<"         Game Start!!!"<<endl<<endl<<endl<<endl<<endl;
             cout<<"         GOOD LUCK!!!"<<endl;
             getch();
             flag=false;
         }
         else if(startKey=='S'||startKey=='s')
         {
             gameSetting();
         }
         system("cls");
     }
     system("cls");
     return ;
 }
 int UserView::gameSetting()
 {
     system("cls");
     cout<<"         Setting:"<<endl<<endl<<endl<<endl;
     cout<<"Please Chose Game Difficulty"<<endl;
     cout<<"Input 'H'or'h'---Hard  Level"<<endl;
     cout<<"Input 'N'or'n'---Nomal Level"<<endl;
     cout<<"Input 'E'or'e'---Easy  Level"<<endl;
     cout<<"Input else return the MENU"<<endl;
     char hardKey=getch();
     if(hardKey=='H'||hardKey=='h')
     {
         cout<<"The Game's Difficulty now is Hard  Level!!!"<<endl;
         speed=HARDSPEED;
         return ;
     }
     else if(hardKey=='N'||hardKey=='n')
     {
         cout<<"The Game's Difficulty now is Nomal  Level!!!"<<endl;
         speed=NOMALSPEED;
         return ;
     }
     else if(hardKey=='E'||hardKey=='e')
     {
         cout<<"The Game's Difficulty now is Easy  Level!!!"<<endl;
         speed=EASYSPEED;
         return ;
     }
     system("cls");
     return ;
 }
 ///----------------------------------------------------
 ///程序入口
 int main()
 {
     while(true)
     {
         FLAG=true;
         UserView view;
         view.menuCreate();
         spa->InitSpace();
         Snake sna;
         sna.foodCreate();
         spa->DisplaySpace();
         while(FLAG)
         {
             char downKey=getch();
             sna.changePoint(downKey);
             ///kbhit()，检查是否有键盘输入，若有，则返回一个非0值，否则返回0，在头文件<conio.h>中定义
             ///此处FLAG如果不加，会产生蛇吃墙现象
             while(FLAG&&!kbhit())
             {
                 system("cls");
                 sna.moving();
                 spa->DisplaySpace();
                 Sleep(speed);
             }
         }
         cout<<"Game Over!!!"<<endl;
         cout<<"The Snake's Length is :"<<sna.getLEN()<<endl<<endl<<endl<<endl;
         cout<<"The Game Will Return Back MENU!"<<endl;
         getch();
         system("cls");
     }
     return ;
 }

最后上几张游戏的运行的截图：