贪吃蛇游戏C语言源代码学习

源代码下载地址为：www.clang.cc

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。

  1 #include<stdio.h>
  2 #include<time.h>
  3 #include<windows.h>
  4 #include<stdlib.h>
  5 
  6 #define U 1
  7 #define D 2
  8 #define L 3 
  9 #define R 4       //蛇的状态，U：上 ；D：下；L:左 R：右
 10 
 11 typedef struct SNAKE //蛇身的一个节点
 12 {
 13     int x;
 14     int y;
 15     struct SNAKE *next;
 16 }snake;
 17 
 18 //全局变量//
 19 int score = 0, add = 10;//总得分与每次吃食物得分。
 20 int status, sleeptime = 200;//每次运行的时间间隔
 21 snake *head, *food;//蛇头指针，食物指针
 22 snake *q;//遍历蛇的时候用到的指针
 23 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。
 24 
 25 //声明全部函数//
 26 void Pos();
 27 void creatMap();
 28 void initSnake();
 29 int biteSelf();
 30 void createFood();
 31 void cantCrossWall();
 32 void snakeMove();
 33 void pause();
 34 void runGame();
 35 void initGame();
 36 void endGame();
 37 void gameStart();
 38 
 39 void Pos(int x, int y)//设置光标位置
 40 {
 41     COORD pos;
 42     HANDLE hOutput;
 43     pos.X = x;
 44     pos.Y = y;
 45     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
 46     SetConsoleCursorPosition(hOutput, pos);
 47 }
 48 
 49 void creatMap()//创建地图
 50 {
 51     int i;
 52     for (i = 0; i<58; i += 2)//打印上下边框
 53     {
 54         Pos(i, 0);
 55         printf("■");//一个方块占两个位置
 56         Pos(i, 26);
 57         printf("■");
 58     }
 59     for (i = 1; i<26; i++)//打印左右边框
 60     {
 61         Pos(0, i);
 62         printf("■");
 63         Pos(56, i);
 64         printf("■");
 65     }
 66 }
 67 
 68 void initSnake()//初始化蛇身
 69 {
 70     snake *tail;
 71     int i;
 72     tail = (snake*)malloc(sizeof(snake));//从蛇尾开始，头插法，以x,y设定开始的位置//
 73     tail->x = 24;
 74     tail->y = 5;
 75     tail->next = NULL;
 76     for (i = 1; i <= 4; i++)//初始长度为4
 77     {
 78         head = (snake*)malloc(sizeof(snake));
 79         head->next = tail;
 80         head->x = 24 + 2 * i;
 81         head->y = 5;
 82         tail = head;
 83     }
 84     while (tail != NULL)//从头到为，输出蛇身
 85     {
 86         Pos(tail->x, tail->y);
 87         printf("■");
 88         tail = tail->next;
 89     }
 90 }
 91 //??
 92 int biteSelf()//判断是否咬到了自己
 93 {
 94     snake *self;
 95     self = head->next;
 96     while (self != NULL)
 97     {
 98         if (self->x == head->x && self->y == head->y)
 99         {
100             return 1;
101         } 
102         self = self->next;
103     }
104     return 0;
105 }
106 
107 void createFood()//随机出现食物
108 {
109     snake *food_1;
110     srand((unsigned)time(NULL));//为了防止每次产生的随机数相同，种子设置为time
111     food_1 = (snake*)malloc(sizeof(snake));
112     while ((food_1->x % 2) != 0)    //保证其为偶数，使得食物能与蛇头对其
113     {
114         food_1->x = rand() % 52 + 2;
115     }
116     food_1->y = rand() % 24 + 1;
117     q = head;
118     while (q->next == NULL)
119     {
120         if (q->x == food_1->x && q->y == food_1->y) //判断蛇身是否与食物重合
121         {
122             free(food_1);
123             createFood();
124         }
125         q = q->next;
126     }
127     Pos(food_1->x, food_1->y);
128     food = food_1;
129     printf("■");
130 }
131 
132 void cantCrossWall()//不能穿墙
133 {
134     if (head->x == 0 || head->x == 56 || head->y == 0 || head->y == 26)
135     {
136         endGamestatus = 1;
137         endGame();
138     }
139 }
140 
141 void snakeMove()//蛇前进,上U,下D,左L,右R
142 {
143     snake * nexthead;
144     cantCrossWall();
145 
146     nexthead = (snake*)malloc(sizeof(snake));
147     if (status == U)
148     {
149         nexthead->x = head->x;
150         nexthead->y = head->y - 1;
151         if (nexthead->x == food->x && nexthead->y == food->y)//如果下一个有食物//
152         {
153             nexthead->next = head;
154             head = nexthead;
155             q = head;
156             while (q != NULL)
157             {
158                 Pos(q->x, q->y);
159                 printf("■");
160                 q = q->next;
161             }
162             score = score + add;
163             createFood();
164         }
165         else                                               //如果没有食物//
166         {
167             nexthead->next = head;
168             head = nexthead;
169             q = head;
170             while (q->next->next != NULL)
171             {
172                 Pos(q->x, q->y);
173                 printf("■");
174                 q = q->next;
175             }
176             Pos(q->next->x, q->next->y);
177             printf("  ");
178             free(q->next);
179             q->next = NULL;
180         }
181     }
182     if (status == D)
183     {
184         nexthead->x = head->x;
185         nexthead->y = head->y + 1;
186         if (nexthead->x == food->x && nexthead->y == food->y)  //有食物
187         {
188             nexthead->next = head;
189             head = nexthead;
190             q = head;
191             while (q != NULL)
192             {
193                 Pos(q->x, q->y);
194                 printf("■");
195                 q = q->next;
196             }
197             score = score + add;
198             createFood();
199         }
200         else                               //没有食物
201         {
202             nexthead->next = head;
203             head = nexthead;
204             q = head;
205             while (q->next->next != NULL)
206             {
207                 Pos(q->x, q->y);
208                 printf("■");
209                 q = q->next;
210             }
211             Pos(q->next->x, q->next->y);
212             printf("  ");
213             free(q->next);
214             q->next = NULL;
215         }
216     }
217     if (status == L)
218     {
219         nexthead->x = head->x - 2;
220         nexthead->y = head->y;
221         if (nexthead->x == food->x && nexthead->y == food->y)//有食物
222         {
223             nexthead->next = head;
224             head = nexthead;
225             q = head;
226             while (q != NULL)
227             {
228                 Pos(q->x, q->y);
229                 printf("■");
230                 q = q->next;
231             }
232             score = score + add;
233             createFood();
234         }
235         else                                //没有食物
236         {
237             nexthead->next = head;
238             head = nexthead;
239             q = head;
240             while (q->next->next != NULL)
241             {
242                 Pos(q->x, q->y);
243                 printf("■");
244                 q = q->next;
245             }
246             Pos(q->next->x, q->next->y);
247             printf("  ");
248             free(q->next);
249             q->next = NULL;
250         }
251     }
252     if (status == R)
253     {
254         nexthead->x = head->x + 2;
255         nexthead->y = head->y;
256         if (nexthead->x == food->x && nexthead->y == food->y)//有食物
257         {
258             nexthead->next = head;
259             head = nexthead;
260             q = head;
261             while (q != NULL)
262             {
263                 Pos(q->x, q->y);
264                 printf("■");
265                 q = q->next;
266             }
267             score = score + add;
268             createFood();
269         }
270         else                                         //没有食物
271         {
272             nexthead->next = head;
273             head = nexthead;
274             q = head;
275             while (q->next->next != NULL)
276             {
277                 Pos(q->x, q->y);
278                 printf("■");
279                 q = q->next;
280             }
281             Pos(q->next->x, q->next->y);
282             printf("  ");
283             free(q->next);
284             q->next = NULL;
285         }
286     }
287     if (biteSelf() == 1)       //判断是否会咬到自己
288     {
289         endGamestatus = 2;
290         endGame();
291     }
292 }
293 
294 void pause()//暂停
295 {
296     while (1)
297     {
298         Sleep(300);
299         if (GetAsyncKeyState(VK_SPACE))
300         {
301             break;
302         }
303 
304     }
305 }
306 
307 void runGame()//控制游戏        
308 {
309 
310     Pos(64, 15);
311     printf("不能穿墙，不能咬到自己\n");
312     Pos(64, 16);
313     printf("用↑.↓.←.→分别控制蛇的移动.");
314     Pos(64, 17);
315     printf("F1 为加速，F2 为减速\n");
316     Pos(64, 18);
317     printf("ESC ：退出游戏.space：暂停游戏.");
318     Pos(64, 20);
319     printf("C语言研究中心 www.clang.cc");
320     status = R;
321     while (1)
322     {
323         Pos(64, 10);
324         printf("得分：%d  ", score);
325         Pos(64, 11);
326         printf("每个食物得分：%d分", add);
327         if (GetAsyncKeyState(VK_UP) && status != D)
328         {
329             status = U;
330         }
331         else if (GetAsyncKeyState(VK_DOWN) && status != U)
332         {
333             status = D;
334         }
335         else if (GetAsyncKeyState(VK_LEFT) && status != R)
336         {
337             status = L;
338         }
339         else if (GetAsyncKeyState(VK_RIGHT) && status != L)
340         {
341             status = R;
342         }
343         else if (GetAsyncKeyState(VK_SPACE))
344         {
345             pause();
346         }
347         else if (GetAsyncKeyState(VK_ESCAPE))
348         {
349             endGamestatus = 3;
350             break;
351         }
352         else if (GetAsyncKeyState(VK_F1))
353         {
354             if (sleeptime >= 50)
355             {
356                 sleeptime = sleeptime - 30;
357                 add = add + 2;
358                 if (sleeptime == 320)
359                 {
360                     add = 2;//防止减到1之后再加回来有错
361                 }
362             }
363         }
364         else if (GetAsyncKeyState(VK_F2))
365         {
366             if (sleeptime<350)
367             {
368                 sleeptime = sleeptime + 30;
369                 add = add - 2;
370                 if (sleeptime == 350)
371                 {
372                     add = 1;  //保证最低分为1
373                 }
374             }
375         }
376         Sleep(sleeptime);
377         snakeMove();
378     }
379 }
380 
381 void initGame()//开始界面
382 {
383     Pos(40, 12);
384 
385     system("title C语言研究中心   www.clang.cc");
386     printf("欢迎来到贪食蛇游戏！");
387     Pos(40, 25);
388     printf("              C语言研究中心  www.clang.cc.\n");
389     system("pause");
390     system("cls");
391     Pos(25, 12);
392     printf("用↑.↓.←.→分别控制蛇的移动， F1 为加速，2 为减速\n");
393     Pos(25, 13);
394     printf("加速将能得到更高的分数。\n");
395     system("pause");
396     system("cls");
397 }
398 
399 void endGame()//结束游戏
400 {
401 
402     system("cls");
403     Pos(24, 12);
404     if (endGamestatus == 1)
405     {
406         printf("对不起，您撞到墙了。游戏结束.");
407     }
408     else if (endGamestatus == 2)
409     {
410         printf("对不起，您咬到自己了。游戏结束.");
411     }
412     else if (endGamestatus == 3)
413     {
414         printf("您的已经结束了游戏。");
415     }
416     Pos(24, 13);
417     printf("您的得分是%d\n", score);
418     while (getchar() != 'y')
419     {    
420         printf("close?[y]");
421     }
422     exit(0);
423 }
424 
425 void gameStart()//游戏初始化
426 {
427     system("mode con cols=100 lines=30");
428     initGame();
429     creatMap();
430     initSnake();
431     createFood();
432 }
433 
434 int main()
435 {
436     gameStart();
437     runGame();
438     endGame();
439     return 0;
440 }

 原博客地址：http://www.cnblogs.com/jacklu/p/5214692.html