贪吃蛇（C++实现，VC6.0编译，使用了EasyX图形库）

程序效果：

代码：

//main.cpp
  1 #include <iostream>
  2 #include<fstream>
  3 #include <graphics.h>
  4 #include <conio.h>
  5 #include<ctime>
  6 #include<windows.h>
  7 #include<mmsystem.h>
  8 #pragma comment(lib,"Winmm.lib")
  9 
 10 #define IMGWIDTH 20
 11 #define IMGHEIGHT 20
 12 #define WIDTH 1100
 13 #define HEIGHT 650
 14 #define UP 72
 15 #define DOWN 80
 16 #define LEFT 75
 17 #define RIGHT 77
 18 #define HEADUP    "headup.jpg"
 19 #define HEADDOWN  "headdown.jpg"
 20 #define HEADLEFT  "headleft.jpg"
 21 #define HEADRIGHT "headright.jpg"
 22 #define BODYLR "bodylr.jpg"
 23 #define BODYUD "bodyud.jpg"
 24 #define TAILL "taill.jpg"
 25 #define TAILR "tailr.jpg"
 26 #define TAILU "tailu.jpg"
 27 #define TAILD "taild.jpg"
 28 #define WALL "wall.jpg"
 29 #define FOOD "food.jpg"
 30 #define GAMEOVER "gameover.jpg"
 31 #define SNAKE "snake.jpg"
 32 #define L 60   //左
 33 #define U 80   //上
 34 #define R 900  //右
 35 #define D 600  //下
 36 using namespace std;
 37 
 38 IMAGE wallimg;
 39 int score=0,grade=1,rec[4];
 40 class Food;
 41 class BodyNode{
 42 private:
 43     IMAGE img;
 44     int x;
 45     int y;
 46     BodyNode* next;
 47     BodyNode(){}
 48     friend class Body;
 49     friend bool check(Body& snake,Food& food);
 50 public:
 51     BodyNode(char* str,int X,int Y){
 52         x=X;
 53         y=Y;
 54         loadimage(&img, _T(str));
 55         next=NULL;
 56     }
 57     BodyNode(BodyNode& bodynode){
 58         x=bodynode.x;
 59         y=bodynode.y;
 60         next=bodynode.next;
 61         img=bodynode.img;
 62     }
 63 };
 64 class Body{
 65 private:
 66     BodyNode* head;
 67     BodyNode* tail;
 68     int length;
 69 public:
 70     friend bool check(Body& snake,Food& food);
 71     Body(){
 72         head=new BodyNode(HEADRIGHT,L+(10*(IMGWIDTH)),U+(10*(IMGHEIGHT)));
 73         head->next=new BodyNode(BODYLR,head->x-head->img.getwidth(),head->y);
 74         head->next->next=new BodyNode(TAILR,head->next->x-head->img.getwidth(),head->y);
 75         tail=head->next->next;
 76         length=2;
 77     }
 78     int Length(){return length;}
 79     bool IsDead(){
 80         BodyNode* p=head->next;
 81         while(p!=NULL){
 82             if(head->x==p->x&&head->y==p->y){
 83                 return true;
 84             }
 85             p=p->next;
 86         }
 87         return false;
 88     }
 89     int Move(int dir){     //1 上 2下  3左 4 右
 90         BodyNode* p=head->next;
 91         int tempx=head->x,tempy=head->y,temp_x,temp_y;
 92         while(p!=tail->next){    
 93             temp_x=p->x;
 94             temp_y=p->y;
 95             p->x=tempx;;
 96             p->y=tempy;
 97             tempx=temp_x;
 98             tempy=temp_y;
 99             p=p->next;
100         }
101         if(dir==1){
102             loadimage(&(head->img), _T(HEADUP));
103             head->y=head->next->y-head->img.getheight();
104         }
105         if(dir==2){
106             loadimage(&(head->img), _T(HEADDOWN));
107             head->y=head->next->y+head->img.getheight();
108         }
109         if(dir==3){
110             loadimage(&(head->img), _T(HEADLEFT));
111             head->x=head->next->x-head->img.getwidth();
112         }
113         if(dir==4){
114             loadimage(&(head->img), _T(HEADRIGHT));
115             head->x=head->next->x+head->img.getwidth();
116         }
117         if((head->x+head->img.getwidth())>R){head->x=L;}
118         if(head->x<L){head->x=R-head->img.getwidth();}
119         if((head->y+head->img.getheight())>D){head->y=U;}
120         if(head->y<U){head->y=D-head->img.getheight();}
121         p=head;
122         while(p->next!=tail){
123             p=p->next;
124         }
125         if(p->x-tail->x>0){loadimage(&(tail->img), _T(TAILR));}
126         if(p->x-tail->x<0){loadimage(&(tail->img), _T(TAILL));}
127         if(p->y-tail->y>0){loadimage(&(tail->img), _T(TAILD));}
128         if(p->y-tail->y<0){loadimage(&(tail->img), _T(TAILU));}
129         return 0;
130     }
131     int Grow(){
132         BodyNode*p=head;
133         while(p->next!=tail){
134             p=p->next;
135         }
136         tail->img=p->img;
137         tail->next=new BodyNode(&(TAILL[0]),tail->x-(p->x-tail->x),tail->y-(p->y-tail->y));
138         
139         tail=tail->next;
140         if(p->x-tail->x>0){loadimage(&(tail->img), _T(TAILR));}
141         if(p->x-tail->x<0){loadimage(&(tail->img), _T(TAILL));}
142         if(p->y-tail->y>0){loadimage(&(tail->img), _T(TAILD));}
143         if(p->y-tail->y<0){loadimage(&(tail->img), _T(TAILU));}
144         tail->next=NULL;
145         length++;
146         return 0;
147     }
148     int Show(){
149         BodyNode* p=head;
150         while(p!=NULL){
151             putimage(p->x, p->y, &(p->img));
152             p=p->next;
153         }
154         return 0;
155     }
156 };
157 class Food{
158 private:
159     int x;
160     int y;
161     IMAGE rat;
162 public:
163     friend bool check(Body& snake,Food& food);
164     Food(){
165         x=400;
166         y=300;
167         loadimage(&(rat), _T(FOOD));
168     }
169     int givefood(Body& snake){
170         srand((unsigned)time(0));
171         while(check(snake,*this)==true){
172             x=0;y=0;
173             while(!(x>L&&y>U)){
174                 x= rand()%900;
175                 y= rand()%600;
176             }
177             x=x-(x%20);
178             y=y-(y%20);
179         }
180         return 0;
181     }
182     int Show(){
183         putimage(x,y,&(rat));
184         return 0;
185     }
186 };
187 int showgame(Body& snake,Food food){
188 
189     cleardevice();
190     BeginBatchDraw();
191     setbkcolor(RGB(0,0,0));    //设置背景色
192     setcolor(YELLOW);         //设置绘图色
193     outtextxy((WIDTH/2)-80, 10, "贪吃蛇");
194     outtextxy(L+300, U-IMGHEIGHT-20, "按空格 暂停");
195     outtextxy(R+IMGWIDTH+20, U+IMGHEIGHT+20, "最高记录：");
196 char rec1[10];//,rec2[10],rec3[10];
197 for(int index=0;index<=2;index++){
198     sprintf(rec1, "%d",rec[index]);
199     outtextxy(R+IMGWIDTH+20, U+IMGHEIGHT+20+(index+1)*30, rec1);
200 }
201     int i,j;
202     for(i=L-IMGWIDTH;i<=R;i=i+IMGWIDTH){
203         j=U-IMGHEIGHT;
204         putimage(i,j,&(wallimg));
205     }
206     for(j=U;j<=D;j=j+IMGHEIGHT){
207         i=L-IMGWIDTH;
208         putimage(i,j,&(wallimg));
209     }
210     for(j=U;j<=D;j=j+IMGHEIGHT){
211         i=R;
212         putimage(i,j,&(wallimg));
213     }
214     for(i=L-IMGWIDTH;i<=R;i=i+IMGWIDTH){
215         j=D;
216         putimage(i,j,&(wallimg));
217     }
218     outtextxy(L-10, U-IMGHEIGHT-20, "得分:");
219     char s[10];
220     sprintf(s, "%d",score);
221     outtextxy(L+60, U-IMGHEIGHT-20, s);
222              outtextxy(L+120, U-IMGHEIGHT-20, "长度:");
223              char l[10];
224              sprintf(l, "%d",snake.Length());
225              outtextxy(L+180, U-IMGHEIGHT-20, l);
226              
227              snake.Show();
228     
229              food.Show();
230              FlushBatchDraw();
231              Sleep(50*grade);
232              
233              return 0;
234 }
235 bool check(Body& snake,Food& food){
236     BodyNode* pl=snake.head;
237     bool flag=false;
238     while(pl!=snake.tail->next){
239         
240         if((pl->x==food.x)&&(pl->y==food.y)){flag=true;break;}
241         
242         pl=pl->next;
243     }
244     return flag;
245 }
246 DWORD WINAPI Fun1Proc(LPVOID IpParameter)
247 {
248     mciSendString("play yeah.mp3 repeat", NULL, 0, NULL);//播放
249     return 0;
250 }
251 int menu(){
252     //cleardevice();
253     outtextxy((WIDTH/2)-80, 120, "贪吃蛇");
254     outtextxy((WIDTH/2)-180, 230, "按↑和↓选择难度");
255     outtextxy((WIDTH/2)-180, 250, "按空格键确定选择");
256     return 0;
257 }
258 int record(){
259     fstream f1("record.txt");   //打开文件，若文件不存在就创建它
260     if(!f1) return -1;
261     //int a=0,b=0,c=0;
262     f1>>rec[0]>>rec[1]>>rec[2];
263     
264     f1.close();
265     return 0;
266 }
267 int saverecord(){
268     system("del record.txt ");
269     ofstream f1("record.txt");   //打开文件，若文件不存在就创建它
270     if(!f1) return -1;
271     int flag=1;
272     int temp;
273     rec[3]=score;
274     while(flag==1){
275         flag=0;
276         for(int i=0;i<=2;i++){
277             if(rec[i]<rec[i+1]){
278                 flag=1;
279                 temp=rec[i];
280                 rec[i]=rec[i+1];
281                 rec[i+1]=temp;
282             }
283         }
284     }
285 
286     f1<<rec[0]<<"\n"<<rec[1]<<"\n"<<rec[2];
287     
288     f1.close();
289     if(score!=rec[3]){
290     settextstyle(50, 0, _T("宋体"));
291     outtextxy(WIDTH/2-(50*5),U+40, "恭喜你创造了新纪录！");
292 }
293     return 0;
294 }
295 int main(){
296     for(int i=0;i<=3;i++){
297     rec[i]=0;
298     }
299     record();
300     IMAGE snakeimg;
301 
302     HANDLE hThread1;
303     hThread1 = CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
304     char key;
305     int movekey=4;
306     int movekeyold=movekey;
307     initgraph(WIDTH,HEIGHT);
308     char temp=0,choose;
309     while(temp!=' '){
310             cleardevice();
311         if(kbhit()){
312             choose=getch();
313             fflush(stdin); 
314             switch(choose){
315             case UP:{
316                 grade++;
317                     };break;
318             case DOWN:{
319                 grade--;
320                       };
321             }
322         }
323         if(grade==4){grade=3;}
324         if(grade==0){grade=1;}
325         outtextxy(420,350,"简单");
326         outtextxy(420,380,"中等");
327         outtextxy(420,410,"难");
328     //    cleardevice();
329         menu();
330         outtextxy(300,300,"请选择难度：");
331         if(grade==3){    
332         outtextxy(390,350,"→");
333         }
334         if(grade==2){
335         outtextxy(390,380,"→");
336         }
337         if(grade==1){
338         outtextxy(390,410,"→");
339         }
340         temp=getch();
341                 }
342     loadimage(&(wallimg), _T(WALL));
343     Body snake;
344                 Food food;
345                 showgame(snake,food);
346                 while(snake.IsDead()==false){
347                 while(snake.IsDead()==false&&(!kbhit())){ 
348                 
349                     if(movekey==1&&movekeyold==2||movekey==2&&movekeyold==1||movekey==3&&movekeyold==4||movekey==4&&movekeyold==3){
350                         movekey=movekeyold;}
351                     movekeyold=movekey;
352                     snake.Move(movekey);
353                     showgame(snake,food);
354                     if(check(snake,food)==true){
355                         mciSendString("play yeah.wav", NULL, 0, NULL);//播放
356                         cout<<'\a';
357                         score+=10;
358                         food.givefood(snake);
359                         snake.Grow();
360                         snake.Grow();
361                         snake.Grow();
362                     }
363                 }
364                     if(kbhit()){
365                         key=getch();
366                         switch(key){
367                         case UP:{movekey=1;
368                                 };break;
369                         case DOWN:{movekey=2;
370                                   };break;
371                         case LEFT:{movekey=3;
372                                   };break;
373                         case RIGHT:{movekey=4;
374                                    };break;
375                         case ' ':{int t=0;
376                             while(t==0){
377                                 if(kbhit()){
378                                     key=getch();
379                                     if(key==' '){
380                                         t=1;
381                                     }
382                                 }
383                             }
384                                  };
385                         }
386                     }    
387                 }
388                 CloseHandle(hThread1);
389                 BeginBatchDraw();
390                 showgame(snake,food);
391                 IMAGE gameoverimg;
392                 loadimage(&(gameoverimg), _T(GAMEOVER));
393                 putimage(WIDTH/2-(gameoverimg.getwidth()/2),HEIGHT/2-(gameoverimg.getheight()/2),&(gameoverimg));
394                 
395                 saverecord();
396                     FlushBatchDraw();
397                 while(1)
398                 {
399                     Sleep(3000);
400                 }
401                 saverecord();
402                 return 0;
403 }