一个控制台贪吃蛇小游戏（wsad控制移动）

 /********************************************
  * 程序名称：MR.DUAN 的贪吃蛇游戏（链表法）
  * 作　　者：WindAutumn <fluttingleaves@hotmail.com>
  * 最后修改：2012-7-25-PM
  * 版 本 号：1.3
  *
  *
  * 以后有空再修改
  * *****************************************/

 #include<stdio.h>
 #include<windows.h>
 #include<conio.h>
 #include<time.h>

 #define MAXWIDE 80
 #define MAXHIGH 24

 typedef struct
 {
     int x;
     int y;
 } POSITION; // 食物，节点

 typedef struct snackbody
 {
     POSITION body;
     snackbody * link;
 } SNACK; // 蛇身的链表

 void StartGame();
 void InitScreen(HANDLE hSnack);
 void HideCursor(HANDLE hSnack);
 void GotoXY(HANDLE hSnack, int x, int y);

 void PrintRandFood(HANDLE hSnack, POSITION * food);
 void PrintSnack(HANDLE hSnack, SNACK * snack, int mode);
 //int  HeadDirection();
 SNACK * SnackHeadWalk(SNACK * snack, int direction);
 void IsDied(HANDLE hSnack, SNACK * snack, POSITION * food);
 void GameOver(HANDLE hSnack);

 void main()
 {
     system("color 7b");// 白色背景
     SetConsoleTitle("MR.DUAN 的贪吃蛇游戏");
     StartGame();
 }

 void StartGame()
 {
     POSITION food;
     SNACK * snack = (SNACK *)malloc(sizeof(SNACK));
     char length = ;// 定义长度
     int  direction_get = ;// 定义获取的方向
     int  direction_last = ;// 定义之后的方向
     int  key_direct;// 按下的按键
     int  foodflag = ;// 食物是否存在，1--是，0--否

     HANDLE hSnack = GetStdHandle(STD_OUTPUT_HANDLE);
     HideCursor(hSnack);
     InitScreen(hSnack);

     srand(time(NULL));// 初始化随机数生成器，以便产生随机 食物
     snack->body.x = ;// 蛇头
     snack->body.y = ;
     snack->link = NULL;

     PrintSnack(hSnack, snack, );// mode 0 打印初始蛇头
     Sleep();
     while()// 贪吃蛇操作
     {
         if(_kbhit())
         {
             key_direct = getch();
             switch(key_direct)
             {
             case 'w'  :
                 direction_get = ;
                 break;// 上// 键盘四按键的逆序
             case 'a'  :
                 direction_get = ;
                 break;// 左
             case 's'  :
                 direction_get = ;
                 break;// 下
             case 'd'  :
                 direction_get = ;
                 break;// 右
             }
         }
         if((direction_last != direction_get + )&&(direction_last != direction_get - ))
             direction_last = direction_get;// 如果行进方向和获取方向不为相反，则改变行进方向
         snack = SnackHeadWalk(snack, direction_last);

         if( == foodflag)
         {
             PrintRandFood(hSnack, &food);// 如果食物已经被吃，则产生新的食物
             foodflag = ;// 食物标记为 未吃
         }

         if(snack->body.x == food.x && snack->body.y == food.y)// 头碰到食物
         {
             PrintSnack(hSnack, snack, );// 只打头不去尾
             foodflag = ;// 食物被吃，没有食物了
             length++;
         }
         else
         {
             PrintSnack(hSnack, snack, );// 打头
             PrintSnack(hSnack, snack, );// 去尾
         }
         IsDied(hSnack, snack, &food);
         Sleep();
     }
 }

 void InitScreen(HANDLE hSnack)// 打印周围红框框
 {
     int i;
     SetConsoleTextAttribute(hSnack, FOREGROUND_INTENSITY | FOREGROUND_RED |
                             BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED);// 红色字体，白色背景
     GotoXY(hSnack, , );
     printf("╔");
     for(i=; i<(MAXWIDE-)/; i++)
         printf("═");
     printf("╗");

     for(i=; i< MAXHIGH; i++)
     {
         GotoXY(hSnack, , i);
         printf("║");
         GotoXY(hSnack, MAXWIDE-, i);
         printf("║");
     }

     GotoXY(hSnack, , MAXHIGH);
     printf("╚");
     for(i=; i<(MAXWIDE-)/; i++)
         printf("═");
     printf("╝");

     GotoXY(hSnack, , );
 }

 void HideCursor(HANDLE hSnack)
 {
     CONSOLE_CURSOR_INFO cursor_info = {, };
     SetConsoleCursorInfo(hSnack, &cursor_info);
 }

 void GotoXY(HANDLE hSnack, int x, int y)
 {
     COORD coord;
     coord.X = x;
     coord.Y = y;
     SetConsoleCursorPosition(hSnack, coord);
 }

 void PrintRandFood(HANDLE hSnack, POSITION * food)// 2--78 中的偶数, 1--23
 {
     food->x = (rand()% + )/*;
     food->y = rand()% + ;
     SetConsoleTextAttribute(hSnack,FOREGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED);
     GotoXY(hSnack, food->x, food->y);
     printf("█");
 }

 void PrintSnack(HANDLE hSnack, SNACK * snack, int mode)
 {
     if( == mode)
     {
         GotoXY(hSnack, snack->body.x, snack->body.y);
         SetConsoleTextAttribute(hSnack,FOREGROUND_BLUE | BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED);
         printf("□");
     }
     if( == mode)
     {
         SNACK * ptail, *pnext;
         ptail = snack;
         pnext = ptail->link;
         while(pnext->link!=NULL)
         {
             ptail = ptail->link;
             pnext = ptail->link;
         }
         GotoXY(hSnack, pnext->body.x, pnext->body.y);
         printf("  ");
         ptail->link = NULL;
         free(pnext);
     }
 }

 /*int  HeadDirection()
 {
 HANDLE hInput = GetStdHandle(STD_INPUT_HANDLE);
 INPUT_RECORD inRec;
 DWORD res;

 ReadConsoleInput(hInput, &inRec, 0, &res);
 if(inRec.EventType == KEY_EVENT)
 {
 switch(inRec.Event.KeyEvent.wVirtualKeyCode)
 {
 case VK_UP    : return 1;
 case VK_DOWN  : return 2;
 case VK_LEFT  : return 3;
 case VK_RIGHT : return 4;
 }
 }
 return 0;
 }*/

 SNACK * SnackHeadWalk(SNACK * snack, int direction)
 {
     // 0为默认值，默认向右，1为向上，2为向下，3为向左，4为向右

     SNACK * newhead = (SNACK * )malloc(sizeof(SNACK));
     switch(direction)
     {
     case  :
         newhead->body.x = snack->body.x;
         newhead->body.y = snack->body.y - ;
         break;
     case  :
         newhead->body.x = snack->body.x;
         newhead->body.y = snack->body.y + ;
         break;
     case  :
         newhead->body.x = snack->body.x - ;
         newhead->body.y = snack->body.y;
         break;
     case  :
     case  :
         newhead->body.x = snack->body.x + ;
         newhead->body.y = snack->body.y;
         break;
     }
     newhead->link = snack;
     return newhead;
 }

 void IsDied(HANDLE hSnack, SNACK * snack, POSITION * food)
 {
     SNACK * pCompare = snack;
     if(snack->body.x ==  || snack->body.y == || snack->body.x == MAXWIDE ||snack->body.y == MAXHIGH)
         GameOver(hSnack);// 撞墙死亡
     while(pCompare->link!=NULL)
     {
         if(pCompare->body.x == snack->body.x && pCompare->body.y == snack->body.y && pCompare!=snack)
             GameOver(hSnack);// 吃到自己死亡
         pCompare = pCompare->link;
     }
 }

 void GameOver(HANDLE hSnack)
 {
     GotoXY(hSnack, MAXWIDE/, MAXHIGH/);
     printf("GAME OVER!");
     GotoXY(hSnack, MAXWIDE/, MAXHIGH/ + );
     printf("PRESS ANY KEY TO EXIT.");
     getch();
     exit();
 }