C语言实现贪吃蛇

日期：2018.9.11

用时：150min

项目：贪吃蛇（C语言--数组   结构体实现）

开发工具：vs2013

关键知识：数组，结构体，图形库，键位操作

源代码：

 #include<stdio.h>
 #include<graphics.h>
 #include<stdlib.h>
 #include<conio.h>
 #include<time.h>

 #define N 200
 int i, key;
 int score = ;
 int gamespeed = ;

 void init(void);
 void Draw();
 void Playgame();
 void Prscore();
 void Gameover();

 struct Food {
     int x;
     int y;
     int yes;
 }food;

 struct Snake{
     int x[N];
     int y[N];
     int node;
     int direcion;
     int life;
 }snake;

 void main()
 {
     init();
     Draw();
     Playgame();
     _getch();
 }

 void init(void)
 {
     initgraph(,);
     setbkcolor(WHITE);
     cleardevice();
 }

 void Draw()
 {
     setcolor(BLACK);
     for (i = ; i <= ; i += )
     {
         rectangle(i, , i + , );
         rectangle(i, , i + , );
     }
     for (i = ; i <= ; i += )
     {
         rectangle(, i, , i + );
         rectangle(, i, , i + );
     }
 }

 void Playgame()
 {
     srand((unsigned)time(NULL));//用时间做种，每次产生的随机数不一样。
     food.yes = ;//1表示需要出现食物，0表示已有食物
     snake.life = ;//0，活着，1 死亡
     snake.direcion = ;
     snake.x[] = ; snake.y[] = ;
     snake.x[] = ; snake.y[] = ;
     snake.node = ;
     Prscore();
     while ()
     {
         while (!_kbhit())
         {
             if (food.yes == )
             {
                 food.x = rand() %  + ;
                 food.y = rand() %  + ;
                 while (food.x %  != )
                     food.x++;
                 while (food.y %  != )
                     food.y++;
                 food.yes = ;
             }
             if (food.yes == )
             {
                 setcolor(RED);
                 rectangle(food.x, food.y, food.x + , food.y + );
             }
             for (i = snake.node - ; i > ; i--)
             {
                 snake.x[i] = snake.x[i - ];
                 snake.y[i] = snake.y[i - ];
             }
             switch (snake.direcion)
             {
             case :snake.x[] += ; break;
             case :snake.x[] -= ; break;
             case :snake.y[] -= ; break;
             case :snake.y[] += ; break;
             }
             for (i = ; i < snake.node; i++)
             {
                 if (snake.x[i] == snake.x[] && snake.y[i] == snake.y[])
                 {
                     Gameover();
                     snake.life = ;
                     break;
                 }
             }
             if (snake.x[]< || snake.x[]> || snake.y[]< || snake.y[]>)
             {
                 Gameover();
                 snake.life = ;
             }
             if (snake.life == )
                 break;
             if (snake.x[] == food.x&&snake.y[] == food.y)
             {
                 setcolor(BLACK);
                 rectangle(food.x, food.y, food.x + , food.y + );
                 snake.x[snake.node] = -; snake.y[snake.node] = -;
                 snake.node++;
                 food.yes = ;
                 score += ;
                 Prscore();
             }
             setcolor(GREEN);
             for (i = ; i < snake.node; i++)
                 rectangle(snake.x[i], snake.y[i],snake.x[i] + , snake.y[i] + );
             if (food.yes == )
             {
                 if (gamespeed >= )
                     gamespeed -= ;//　速度最大不超过
             }

             Sleep(gamespeed);
             setcolor(WHITE);
             rectangle(snake.x[snake.node - ], snake.y[snake.node - ], snake.x[snake.node-] + , snake.y[snake.node - ] + );
         }
         if (snake.life == )
             break;
         switch (_getch())
         {
         case 'w':
         case 'W':
             if (snake.direcion != )
             {
                 snake.direcion = ;
             }
             break;
         case 'd':
         case 'D':
             if (snake.direcion != )
             {
                 snake.direcion = ;
             }
             break;
         case 'a':
         case 'A':
             if (snake.direcion != )
             {
                 snake.direcion = ;
             }
             break;
         case 's':
         case 'S':
             if (snake.direcion != )
             {
                 snake.direcion = ;
             }
             break;
         }
     }
 }

 void Prscore()
 {
     char str[];
     setfillstyle(SOLID_FILL, YELLOW);
     bar(, , , );
     setcolor();
     sprintf_s(str, "score:%d", score);
     outtextxy(, , str);
 }

 void Gameover()
 {
     cleardevice();
     setbkcolor(WHITE);
     Prscore();
     setcolor(RED);
     settextstyle(, , "楷体");
     outtextxy(, , "GAME OVER");
     _getch();
 }

运行截图：