C语言链表实现贪吃蛇游戏分享

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阅读学习了源代码，并做了简单的注释和修改，里面只用了链表数据结构，非常适合C语言入门者学习阅读。

程序可在VS2013下编译运行。

  #include<stdio.h>  #include<time.h>  #include<windows.h>  #include<stdlib.h>    #define U 1  #define D 2  #define L 3   #define R 4  //蛇的状态，U：上 ；D：下；L:左 R：右    typedef struct SNAKE //蛇身的一个节点  {   int x;   int y;   struct SNAKE *next;  }snake;    //全局变量//  int score = 0, add = 10;//总得分与每次吃食物得分。  int status, sleeptime = 200;//每次运行的时间间隔  snake *head, *food;//蛇头指针，食物指针  snake *q;//遍历蛇的时候用到的指针  int endGamestatus = 0; //游戏结束的情况，1：撞到墙；2：咬到自己；3：主动退出游戏。    //声明全部函数//  void Pos();  void creatMap();  void initSnake();  int biteSelf();  void createFood();  void cantCrossWall();  void snakeMove();  void pause();  void runGame();  void initGame();  void endGame();  void gameStart();    void Pos(int x, int y)//设置光标位置  {   COORD pos;   HANDLE hOutput;   pos.X = x;   pos.Y = y;   hOutput = GetStdHandle(STD_OUTPUT_HANDLE);//返回标准的输入、输出或错误的设备的句柄，也就是获得输入、输出/错误的屏幕缓冲区的句柄   SetConsoleCursorPosition(hOutput, pos);  }    void creatMap()//创建地图  {   int i;   for (i = 0; i<58; i += 2)//打印上下边框   {    Pos(i, 0);    printf("■");//一个方块占两个位置    Pos(i, 26);    printf("■");   }   for (i = 1; i<26; i++)//打印左右边框   {    Pos(0, i);    printf("■");    Pos(56, i);    printf("■");   }  }    void initSnake()//初始化蛇身  {   snake *tail;   int i;   tail = (snake*)malloc(sizeof(snake));//从蛇尾开始，头插法，以x,y设定开始的位置//   tail->x = 24;   tail->y = 5;   tail->next = NULL;   for (i = 1; i <= 4; i++)//初始长度为4   {    head = (snake*)malloc(sizeof(snake));    head->next = tail;    head->x = 24 + 2 * i;    head->y = 5;    tail = head;   }   while (tail != NULL)//从头到为，输出蛇身   {    Pos(tail->x, tail->y);    printf("■");    tail = tail->next;   }  }  //??  int biteSelf()//判断是否咬到了自己  {   snake *self;   self = head->next;   while (self != NULL)   {    if (self->x == head->x && self->y == head->y)    {     return 1;    }     self = self->next;   }   return 0;  }    void createFood()//随机出现食物  {   snake *food_1;   srand((unsigned)time(NULL));//为了防止每次产生的随机数相同，种子设置为time   food_1 = (snake*)malloc(sizeof(snake));   while ((food_1->x % 2) != 0) //保证其为偶数，使得食物能与蛇头对其   {    food_1->x = rand() % 52 + 2;   }   food_1->y = rand() % 24 + 1;   q = head;   while (q->next == NULL)   {    if (q->x == food_1->x && q->y == food_1->y) //判断蛇身是否与食物重合    {     free(food_1);     createFood();    }    q = q->next;   }   Pos(food_1->x, food_1->y);   food = food_1;   printf("■");  }    void cantCrossWall()//不能穿墙  {   if (head->x == 0 || head->x == 56 || head->y == 0 || head->y == 26)   {    endGamestatus = 1;    endGame();   }  }    void snakeMove()//蛇前进,上U,下D,左L,右R  {   snake * nexthead;   cantCrossWall();     nexthead = (snake*)malloc(sizeof(snake));   if (status == U)   {    nexthead->x = head->x;    nexthead->y = head->y - 1;    if (nexthead->x == food->x && nexthead->y == food->y)//如果下一个有食物//    {     nexthead->next = head;     head = nexthead;     q = head;     while (q != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     score = score + add;     createFood();    }    else            //如果没有食物//    {     nexthead->next = head;     head = nexthead;     q = head;     while (q->next->next != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     Pos(q->next->x, q->next->y);     printf(" ");     free(q->next);     q->next = NULL;    }   }   if (status == D)   {    nexthead->x = head->x;    nexthead->y = head->y + 1;    if (nexthead->x == food->x && nexthead->y == food->y) //有食物    {     nexthead->next = head;     head = nexthead;     q = head;     while (q != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     score = score + add;     createFood();    }    else        //没有食物    {     nexthead->next = head;     head = nexthead;     q = head;     while (q->next->next != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     Pos(q->next->x, q->next->y);     printf(" ");     free(q->next);     q->next = NULL;    }   }   if (status == L)   {    nexthead->x = head->x - 2;    nexthead->y = head->y;    if (nexthead->x == food->x && nexthead->y == food->y)//有食物    {     nexthead->next = head;     head = nexthead;     q = head;     while (q != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     score = score + add;     createFood();    }    else        //没有食物    {     nexthead->next = head;     head = nexthead;     q = head;     while (q->next->next != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     Pos(q->next->x, q->next->y);     printf(" ");     free(q->next);     q->next = NULL;    }   }   if (status == R)   {    nexthead->x = head->x + 2;    nexthead->y = head->y;    if (nexthead->x == food->x && nexthead->y == food->y)//有食物    {     nexthead->next = head;     head = nexthead;     q = head;     while (q != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     score = score + add;     createFood();    }    else           //没有食物    {     nexthead->next = head;     head = nexthead;     q = head;     while (q->next->next != NULL)     {      Pos(q->x, q->y);      printf("■");      q = q->next;     }     Pos(q->next->x, q->next->y);     printf(" ");     free(q->next);     q->next = NULL;    }   }   if (biteSelf() == 1)  //判断是否会咬到自己   {    endGamestatus = 2;    endGame();   }  }    void pause()//暂停  {   while (1)   {    Sleep(300);    if (GetAsyncKeyState(VK_SPACE))    {     break;    }     }  }    void runGame()//控制游戏    {     Pos(64, 15);   printf("不能穿墙，不能咬到自己n");   Pos(64, 16);   printf("用↑.↓.←.→分别控制蛇的移动.");   Pos(64, 17);   printf("F1 为加速，F2 为减速n");   Pos(64, 18);   printf("ESC ：退出游戏.space：暂停游戏.");   Pos(64, 20);   printf("C语言研究中心 www.clang.cc");   status = R;   while (1)   {    Pos(64, 10);    printf("得分：%d ", score);    Pos(64, 11);    printf("每个食物得分：%d分", add);    if (GetAsyncKeyState(VK_UP) && status != D)    {     status = U;    }    else if (GetAsyncKeyState(VK_DOWN) && status != U)    {     status = D;    }    else if (GetAsyncKeyState(VK_LEFT) && status != R)    {     status = L;    }    else if (GetAsyncKeyState(VK_RIGHT) && status != L)    {     status = R;    }    else if (GetAsyncKeyState(VK_SPACE))    {     pause();    }    else if (GetAsyncKeyState(VK_ESCAPE))    {     endGamestatus = 3;     break;    }    else if (GetAsyncKeyState(VK_F1))    {     if (sleeptime >= 50)     {      sleeptime = sleeptime - 30;      add = add + 2;      if (sleeptime == 320)      {       add = 2;//防止减到1之后再加回来有错      }     }    }    else if (GetAsyncKeyState(VK_F2))    {     if (sleeptime<350)     {      sleeptime = sleeptime + 30;      add = add - 2;      if (sleeptime == 350)      {       add = 1; //保证最低分为1      }     }    }    Sleep(sleeptime);    snakeMove();   }  }    void initGame()//开始界面  {   Pos(40, 12);     system("title C语言研究中心 www.clang.cc");   printf("欢迎来到贪食蛇游戏！");   Pos(40, 25);   printf("    C语言研究中心 www.clang.cc.n");   system("pause");   system("cls");   Pos(25, 12);   printf("用↑.↓.←.→分别控制蛇的移动， F1 为加速，2 为减速n");   Pos(25, 13);   printf("加速将能得到更高的分数。n");   system("pause");   system("cls");  }    void endGame()//结束游戏  {     system("cls");   Pos(24, 12);   if (endGamestatus == 1)   {    printf("对不起，您撞到墙了。游戏结束.");   }   else if (endGamestatus == 2)   {    printf("对不起，您咬到自己了。游戏结束.");   }   else if (endGamestatus == 3)   {    printf("您的已经结束了游戏。");   }   Pos(24, 13);   printf("您的得分是%dn", score);   while (getchar() != 'y')   {     printf("close?[y]");   }   exit(0);  }    void gameStart()//游戏初始化  {   system("mode con cols=100 lines=30");   initGame();   creatMap();   initSnake();   createFood();  }    int main()  {   gameStart();   runGame();   endGame();   return 0;  }    

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