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源码： http://pan.baidu.com/s/1sjPzC7r

以下为主要核心代码，想查看详细代码可下载源码。

int main(int argc, char *argv[])
{
start:
 system("cls");
 Init();/*初始化*/
 
 PrintNotice_XY("贪吃蛇",_CENTER_X(6),_CENTER_Y-2);
 PrintNotice("Press Enter to start!");
 
 int key;/*为获取按键*/
 while(1)
 {
  if(kbhit())
  {
   key=getch();
   break;
  }
  Sleep(1000);
 }
 if(key==0xA||key==0xD)/*Enter:0xA和0xD是为兼容不同系统*/
 {
  /*清字幕*/
  PrintNotice_XY("      ",_CENTER_X(6),_CENTER_Y-2);
  PrintNotice("                                 ");
  StartGame();/*开始游戏*/
 }
 if(key==0x1b) /*Esc*/
 {
  exit(0);
 }
 goto start;
 return 0;
}
/*初始化*/
void Init()
{
 i_Point=0;//初始化分数
 HideCursor();/*隐藏光标*/
 PrintUI();/*打印背景*/
}
/*初始化蛇*/
void InitSnake()
{
 snakeHead=(Node *)malloc(sizeof(Node));
 snakeEnd=(Node *)malloc(sizeof(Node));
 snakeHead->nodeX=_COL_NUM+_COL_START-(_SNAKE_INIT_LEN);
 snakeHead->nodeY=_ROW_NUM/2+_ROW_START;
 snakeHead->direction=_LEFT;/*向左移动*/
 
 snakeEnd->nodeX=snakeHead->nodeX+2;
 snakeEnd->nodeY=snakeHead->nodeY;
 snakeEnd->direction=snakeHead->direction;
 snakeHead->next=snakeEnd;
 snakeEnd->next=NULL;
}
 
/*打印蛇*/
void PrintSnake(Node *node)
{
 GotoXy(node->nodeX,node->nodeY);
 printf(_Node_CHAR);
 if(node->next!=NULL)
 {
  PrintSnake(node->next);
 }
}
/*显示食物*/
void PrintFood()
{
 food=(Food *)malloc(sizeof(Food));
 srand(_SEED);/*设置随机种子*/
 while(1)
 {
  /*用rand()生成范围(x,y)的随机数，公式：x+rand()%(y-x+1)*/
  food->foodX=_COL_START+2+rand()%((_COL_NUM*2-2-2)-1);/*(_COL_NUM*2-2-2):偏移量+宽*2-右边框宽度-圆点宽度*/
  food->foodY=_ROW_START+1+rand()%(_ROW_NUM-2);
  if(food->foodX%2)/*此段代码是为防止食物X坐标是单数而加*/
  {
   if(food->foodX>_COL_NUM+_COL_START)/*在屏幕中心的右边，则-1，否则+1*/
   {
    food->foodX=food->foodX-1;
   }
   else
   {
    food->foodX=food->foodX+1;
   }
  }
  int flag=IsOccupied(snakeHead,food->foodX,food->foodY);
  if(flag==0)
  {
   GotoXy(food->foodX,food->foodY);
   printf("●");
   break;
  }
  
 }
}
/*指示坐标是否被蛇占用*/
int IsOccupied(Node *head,char x,char y)
{
 if((head->nodeX==x && head->nodeY==y)||(head->nodeX+1==x && head->nodeY==y))
 {
  return 1;
 }
 if(head->next!=NULL)
 {
  IsOccupied(head->next,x,y);
 }
 else
 {
  return 0;
 }
}
/*开始游戏*/
void StartGame()
{
 InitSnake();/*初始化蛇参数*/
 PrintSnake(snakeHead);/*打印蛇*/
 PrintFood();/*打印食物*/
 short speed=_INIT_SPEED;
 int isSuccess=1;
 char key;/*按键*/
 while(1)
 {
  if(kbhit())
  {
   key=getch();
   if(key==0x20)/*空格*/
   {
    PrintNotice(" PAUSE ");
    getch();
    PrintNotice("     ");
    GotoXy(food->foodX,food->foodY);
    printf("●");
   }
   if(key==0x1b) /*Esc*/
   {
    char ques[]=" Do you want to exit? ";
    char ansYes[]=" [Y]:Yes ";
    char ansNo[]=" [Any key]:No ";
    short len=strlen(ques);
    PrintNotice_XY(ques,_CENTER_X(len),_CENTER_Y-1);
    len=strlen(ansYes);
    PrintNotice_XY(ansYes,_CENTER_X(len),_CENTER_Y);
    len=strlen(ansNo);
    PrintNotice_XY(ansNo,_CENTER_X(len),_CENTER_Y+1);
    
    key=getch();
    if(key=='Y' || key=='y')
    {
     exit(0);
    }
    
    /*重新打印背景和食物*/
    PrintUI();
    GotoXy(food->foodX,food->foodY);
    printf("●");
   }
   /*处理方向键和大写锁定*/
   switch(key)
   {
    case 'W':
    case 72:
     key=_UP;
     break;
    case 'A':
    case 75:
     key=_LEFT;
     break;
    case 'D':
    case 77:
     key=_RIGHT;
     break;
    case 'S':
    case 80:
     key=_DOWN;
     break;
   }
   /*避免蛇逆向移动*/
   if(key==_UP||key==_LEFT||key==_DOWN||key==_RIGHT)
   {
    switch(snakeHead->direction)
    {
     case _UP:
     case _DOWN:
      if(key==_DOWN||key==_UP)
      {
       continue;
      }
      break;
     case _LEFT:
     case _RIGHT:
      if(key==_LEFT||key==_RIGHT)
      {
       continue;
      }
      break;
    }
    snakeHead->direction=key;
   }
  }
  GotoXy(_COL_START+(_COL_NUM*2)+1,_ROW_START+1);/*行1*/
  printf("[蛇]   X:%i Y:%i ",snakeHead->nodeX,snakeHead->nodeY);
  GotoXy(_COL_START+(_COL_NUM*2)+1,_ROW_START+2);/*行2*/
  printf("[食物] X:%i Y:%i ",food->foodX,food->foodY);
  GotoXy(_COL_START+(_COL_NUM*2)+1,_ROW_START+3);/*行3*/
  printf("[速度] %i ",speed);
  GotoXy(_COL_START+(_COL_NUM*2)+1,_ROW_START+4);/*行4*/
  printf("[得分] %i ",i_Point);
  GotoXy(_COL_START+(_COL_NUM*2)+1,_ROW_START+5);/*行5*/
  printf("SPACE 暂停");
  isSuccess=MoveSnake();/*移动蛇*/
  if(isSuccess==0)
  {
   char notice[] ="GAME OVER";
   PrintNotice(notice);
   break;
  }
  /*变速*/
  speed=(_INIT_SPEED-i_Point*_SPEED_UP)<=1?1:(_INIT_SPEED-i_Point*_SPEED_UP);
  Sleep(speed);
 }
 getch();
}
/*移动蛇*/
int MoveSnake()
{
 int isPrintFood=0;
 char emptyX=snakeEnd->nodeX;
 char emptyY=snakeEnd->nodeY;
 
 switch(snakeHead->direction)
 {
  case _UP:
   if(IsBiteBody(snakeHead,snakeHead->nodeX,snakeHead->nodeY-1))
   {
    return 0;
   }
   if((snakeHead->nodeY-1)<=_ROW_START)
   {
    return 0;
   }
   if(food->foodX==snakeHead->nodeX&&food->foodY==snakeHead->nodeY-1)
   {
    /*将新的节点加到蛇尾巴*/
    Node *newNode=(Node *)malloc(sizeof(Node));
    newNode->next=NULL;
    snakeEnd->next=newNode;
    snakeEnd=newNode;
    isPrintFood=1;
   }
   /*将头部数据往下更新*/
   UpdataNode(snakeHead,snakeHead->nodeX,snakeHead->nodeY-1,snakeHead->direction);
   break;
  case _LEFT:
   if(IsBiteBody(snakeHead,snakeHead->nodeX-2,snakeHead->nodeY))
   {
    return 0;
   }
   if(snakeHead->nodeX<=_COL_START+2)
   {
    return 0;
   }
   if(food->foodX==snakeHead->nodeX-2 && food->foodY==snakeHead->nodeY)
   {
    Node *newNode=(Node *)malloc(sizeof(Node));
    newNode->next=NULL;
    snakeEnd->next=newNode;
    snakeEnd=newNode;
    isPrintFood=1;
   }
   /*将头部数据往下更新*/
   UpdataNode(snakeHead,snakeHead->nodeX-2,snakeHead->nodeY,snakeHead->direction);
   break;
  case _DOWN:
   if(IsBiteBody(snakeHead,snakeHead->nodeX,snakeHead->nodeY+1))
   {
    return 0;
   }
   if(snakeHead->nodeY+2>=_ROW_START+_ROW_NUM)
   {
    return 0;
   }
   if(food->foodX==snakeHead->nodeX&&food->foodY==snakeHead->nodeY+1)
   {
    Node *newNode=(Node *)malloc(sizeof(Node));
    newNode->next=NULL;
    snakeEnd->next=newNode;
    snakeEnd=newNode;
    isPrintFood=1;
   }
   /*将头部数据往下更新*/
   UpdataNode(snakeHead,snakeHead->nodeX,snakeHead->nodeY+1,snakeHead->direction);
   break;
  break;
  case _RIGHT:
   if(IsBiteBody(snakeHead,snakeHead->nodeX+2,snakeHead->nodeY))
   {
    return 0;
   }
   if(snakeHead->nodeX+2+2>=_COL_START+_COL_NUM*2)
   {
    return 0;
   }
   if(food->foodX==snakeHead->nodeX+2 && food->foodY==snakeHead->nodeY)
   {
    Node *newNode=(Node *)malloc(sizeof(Node));
    newNode->next=NULL;
    snakeEnd->next=newNode;
    snakeEnd=newNode;
    isPrintFood=1;
   }
   /*将头部数据往下更新*/
   UpdataNode(snakeHead,snakeHead->nodeX+2,snakeHead->nodeY,snakeHead->direction);
  break;
 }
 
 PrintSnake(snakeHead);
 if(isPrintFood)
 {
  i_Point++;
  emptyX=snakeEnd->nodeX;
  emptyY=snakeEnd->nodeY;
  PrintFood();
 }
 GotoXy(emptyX,emptyY);
 printf(_EMPTY_CHAR);
 
 return 1;
}
/*递归更新节点*/
void UpdataNode(Node *node,char x,char y,char dir)
{
 char c_X=node->nodeX;
 char c_Y=node->nodeY;
 char c_Dir=node->direction;
 node->nodeX=x;
 node->nodeY=y;
 node->direction=dir;
 if(node->next!=NULL)
 {
  UpdataNode(node->next,c_X,c_Y,c_Dir);
 }
}
/*判断是否咬到身体*/
int IsBiteBody(Node *node,char headX,char headY)
{
 while (node->next!=NULL)
 {
   if(node->nodeX==headX && node->nodeY==headY)
  {
   return 1;
  }
  node=node->next;
 }
 return 0;
}

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