C语言所写的简单的贪吃蛇代码

• 才刚开始学习不久，学到链表之后老师布置了这个任务，用了很多不太熟悉的函数，例如WINDOWS.H中的定位光标，暂停、清空面板、改变面板大小等。

• 之后我会慢慢加上注释。
• #include
• #include

• #include
  #include
  #define U 1
  #define D 2
  #define L 3 
  #define R 4 
  void Pos();
  void creatmap();
  void creatsnake();
  int biteself();
  void creatfood();
  void cantcrosswall();
  void snakemove();
  void welcometogame();
  void gamestart();
  void caozuo();
  typedef struct snake
  {
  int x;
  int y;
  struct snake *next;
  }snake;
  int score=0,add=10,maxscore=0;
  int status,sleeptime=200;
  snake *head,*food;
  snake *q;
  int endgamestatus=0;
  void Pos(int x,int y)
  {
      COORD pos;
  HANDLE hOutput;
      pos.X=x;
      pos.Y=y;
      hOutput=GetStdHandle(STD_OUTPUT_HANDLE);
      SetConsoleCursorPosition(hOutput,pos);
  }
  void creatmap()
  {
      int i;
      for(i=0;i<58;i+=2)
      {
          Pos(i,0);
          printf("■");
          Pos(i,26);
          printf("■");
      }  
  for(i=1;i<26;i++)
      {
          Pos(0,i);
          printf("■");                        
          Pos(56,i);
          printf("■");        
      }
  }
  void creatsnake()
  {
  snake *tail;
  int i;
  tail=(snake*)malloc(sizeof(snake));
  tail->x=24;
  tail->y=5;
  tail->next=NULL;
  for(i=1;i<=4;i++)
  {
  head=(snake*)malloc(sizeof(snake));
  head->next=tail;
  head->x=24+2*i;
  head->y=5;
  tail=head;
  }
  Pos(tail->x,tail->y);
  printf("⊙");
  tail=tail->next;
  while(tail!=NULL)
  {
  Pos(tail->x,tail->y);
  printf("●");
  tail=tail->next;
  }
  }
  int biteself()
  {
      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 creatfood()
  {
  snake *food_1;
  srand((unsigned)time(NULL));
  food_1=(snake*)malloc(sizeof(snake));
  while(food_1->x%2!=0)
  {
  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)
          {
              free(food_1);
              creatfood();
          }
          q=q->next;
      }
  Pos(food_1->x,food_1->y);
      food=food_1;
      printf("◎");
  }
  void cantcrosswall()
  {  
      if(head->x==0 || head->x==56 ||head->y==0 || head->y==26)
      {
          endgamestatus=1;
      }
  }
  void snakemove()
  {
  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)
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;
              while(q!=NULL)
              {
                  Pos(q->x,q->y);
                  printf("●");
                  q=q->next;
              }
              score=score+add;
              creatfood();
          }
          else                                              
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;
              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)  
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;
              while(q!=NULL)
              {
                  Pos(q->x,q->y);
                  printf("●");
                  q=q->next;
              }
              score=score+add;
              creatfood();
          }
          else                               
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;
              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)
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;
              while(q!=NULL)
              {
                  Pos(q->x,q->y);
                  printf("●");
                  q=q->next;
              }
              score=score+add;
              creatfood();
          }
          else                              
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;
              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)
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;
              while(q!=NULL)
              {
                  Pos(q->x,q->y);
                  printf("●");
                  q=q->next;
              }
              score=score+add;
              creatfood();
          }
          else                                    
          {
              nexthead->next=head;
              head=nexthead;
              q=head;
  Pos(q->x,q->y);
  printf("⊙");
  q=q->next;  
              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)      
      {
          endgamestatus=2;
      }
  }
  void pause()
  {
      while(1)
      {
          Sleep(300);
          if(GetAsyncKeyState(VK_SPACE))
          {
              break;
          }
      }
  }
  
  
  void welcometogame()
  {  
  Pos(40,12);
  printf("欢迎来到贪食蛇游戏！");
  Pos(40,25);
  system("pause");
  system("cls");
  }
  
  
  void caozuo()
  {
  Pos(64,16);
      printf("你可以用↑.↓.←.→分别控制蛇的移动.");
  Pos(64,18);
      printf("ESC ：退出游戏.space：暂停游戏.");
  Pos(64,20);
  printf("F1:减慢蛇的运动速度 F2：加快它的速度");
  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);
  Pos(64,12);
          printf("最高分：%d分",maxscore);
          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;
                  }
              }
          }
          else if(GetAsyncKeyState(VK_F2))
          {
              if(sleeptime<350)
              {
                  sleeptime=sleeptime+30;
                  add=add-2;
                  if(sleeptime==350)
                  {
                      add=1; 
                  }
              }
          }
  Sleep(sleeptime);
          snakemove();
  if(endgamestatus!=0)
  {
  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("您结束了游戏。");
  }
  Pos(24,13);
  if(maxscore