贪吃蛇（c++，codeblacks+EGE库）

运行截图：
代码：
  1 #include <iostream>
  2 #include <graphics.h>
  3 #include <time.h>
  4 #include <stdlib.h>
  5 using namespace std;
  6 class point
  7 {
  8   public:
  9   int x,y;
 10   point *next;
 11   point *last;
 12   point()
 13   {
 14 
 15   }
 16   point(int x1,int y1)
 17   {   next=NULL;
 18       last=NULL;
 19       x=x1;
 20       y=y1;
 21   }
 22 };
 23 class she
 24 {
 25     public:
 26     bool live;
 27     int length;
 28     int diction;
 29     point* head;
 30     she()
 31     {   live=true;
 32         length=1;
 33         diction=2;
 34         head=new point(20,20);
 35     }
 36     void move(int x)
 37     {
 38            point *p=head;
 39            while(p->next)
 40            {
 41               p=p->next;
 42            }
 43            while(p->last)
 44            {
 45                p->x=p->last->x;
 46                p->y=p->last->y;
 47                p=p->last;
 48            }
 49         if(x==1)
 50         {
 51             head->y-=2;
 52         }
 53         if(x==2)
 54         {
 55             head->y+=2;
 56         }
 57         if(x==3)
 58         {
 59             head->x-=2;
 60         }
 61         if(x==4)
 62         {
 63             head->x+=2;
 64         }
 65     }
 66     void eat(int x,int y)
 67     {
 68         point *p=new point(x+2,y+2);
 69         p->next=head;
 70         head->last=p;
 71         head=p;
 72     }
 73     bool islive()
 74     {
 75         return live;
 76     }
 77 
 78 };
 79 class showview
 80 {
 81    public:
 82    point* m;
 83    she s;
 84    point food;
 85    showview()
 86    {
 87         m=new point(10,10);
 88         m->next=new point(400,400);
 89         putcolor();
 90         dian();
 91    }
 92    void dian()
 93    {
 94        srand((unsigned)time(NULL));
 95        int n1=m->next->x-m->x;
 96        int m1=m->next->y-m->y;
 97        int x=rand()%n1+m->x;
 98        int y=rand()%m1+m->y;
 99        while(1)
100        {
101            if(getpixel(x,y)!=BLACK)
102            {
103                x=rand()%n1+m->x;
104                y=rand()%m1+m->y;
105            }else{
106            break;
107            }
108        }
109        food.x=x;
110        food.y=y;
111        putpixel2(x,y,YELLOW);
112    }
113    void putpixel2(int i,int j,int color)
114    {
115        putpixel(i,j,color);
116        putpixel(i-1,j,color);
117        putpixel(i+1,j,color);
118        putpixel(i,j-1,color);
119        putpixel(i,j+1,color);
120        putpixel(i-1,j-1,color);
121        putpixel(i-1,j+1,color);
122        putpixel(i+1,j-1,color);
123        putpixel(i+1,j+1,color);
124   }
125 
126    void putcolor()
127    {
128       //墙
129       for(int i=m->x;i<=m->next->x;i++)
130       {
131            putpixel(i,m->y,WHITE);
132            putpixel(i,m->next->y,WHITE);
133       }
134       for(int i=m->y;i<=m->next->y;i++)
135       {
136            putpixel(m->x,i,WHITE);
137            putpixel(m->next->x,i,WHITE);
138       }
139      //蛇
140 
141        point *p=s.head->next;
142        if(s.head!=NULL)
143        putpixel2(s.head->x,s.head->y,RED);  //头
144        else
145         cout<<"jsdfk"<<endl;
146        while(p!=NULL)
147        {
148           putpixel2(p->x,p->y,GREEN);   //身
149            p=p->next;
150        }
151 
152    }
153    bool meet(int x,int y,int x1,int y1)
154    {
155        if(x==x1&&y==y1)
156         return true;
157         if(x+1==x1&&y+1==y1)
158         return true;
159         if(x+1==x1&&y-1==y1)
160         return true;
161         if(x==x1&&y+1==y1)
162         return true;
163         if(x==x1&&y-1==y1)
164         return true;
165         if(x+1==x1&&y==y1)
166         return true;
167         if(x-1==x1&&y==y1)
168         return true;
169         return false;
170    }
171   void start()
172   {
173        char x;
174        while(1)
175        {   api_sleep(100);
176            if(kbhit())
177            {
178               x=getch();
179               if(x=='w')
180                 s.diction=1;
181               if(x=='s')
182                 s.diction=2;
183               if(x=='a')
184                 s.diction=3;
185               if(x=='d')
186                 s.diction=4;
187            }
188            s.move(s.diction);
189            if(meet(s.head->x,s.head->y,food.x,food.y))
190            {
191              s.eat(food.x,food.y);
192              cleardevice();
193              putcolor();
194              dian();
195              continue;
196            }
197             if(getpixel(s.head->x,s.head->y)==WHITE||getpixel(s.head->x,s.head->y+1)==WHITE||getpixel(s.head->x,s.head->y-1)==WHITE||getpixel(s.head->x+1,s.head->y)==WHITE)
198             break;
199              cleardevice();
200              putcolor();
201              putpixel2(food.x,food.y,YELLOW);
202        }
203   }
204 
205 };
206 
207 
208 int main()
209 {  initgraph(-1,-1);
210    showview ob;
211   ob.start();
212    //ob.start();
213      closegraph();
214     return 0;
215 }