控制台小游戏——贪吃蛇

网上看到的一个贪吃蛇程序，修复了一些bug（如可以直接转反方向，苹果与蛇重叠，撞到自身不会死亡等），下面是源代码。

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  1 #include<iostream>
  2 #include<windows.h>
  3 #include<time.h>
  4 #include<stdlib.h>
  5 #include<conio.h>
  6 #define N 21
  7 using namespace std;
  8 //移动光标
  9 void gotoxy(int x,int y)
 10 {
 11     COORD pos;
 12     pos.X=2*x;
 13     pos.Y=y;
 14     SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),pos);
 15 }
 16 //调整颜色
 17 void color(int a)
 18 {
 19     SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),a);
 20 }
 21 //初始化函数
 22 void init(int apple[2])
 23 {
 24     int i,j;
 25     int wall[N+2][N+2]={{0}};
 26     for(i=1;i<=N;i++)
 27     {
 28         for(j=1;j<=N;j++)
 29         wall[i][j]=1;
 30     }
 31     color(11);
 32     for(i=0;i<N+2;i++)
 33     {
 34         for(j=0;j<N+2;j++)
 35         {
 36             if(wall[i][j])
 37             cout<<"■";
 38             else cout<<"□" ;
 39         }
 40         cout<<endl;
 41     }
 42     gotoxy(N+3,1);
 43     color(20);
 44     cout<<"按 W S A D 移动方向"<<endl;
 45     gotoxy(N+3,2);
 46     color(20);
 47     cout<<"按任意键暂停"<<endl;
 48     gotoxy(N+3,3);
 49     color(20);
 50     cout<<"得分："<<endl;
 51     apple[0]=rand()%(N-2)+2;
 52     apple[1]=rand()%(N-2)+2;
 53     gotoxy(apple[0],apple[1]);
 54     color(12);
 55     cout<<"●"<<endl;
 56 }
 57 int main()
 58 {
 59     int i,j;
 60     int** snake=NULL;
 61     int apple[2];
 62     int score=0;
 63     int tail[2];
 64     int len=3;
 65     char ch=‘p‘;
 66     srand((unsigned)time(NULL));
 67     init(apple);
 68     snake=(int**)realloc(snake,sizeof(int*)*len);
 69     for(i=0;i<len;i++)
 70     snake[i]=(int*)malloc(sizeof(int)*2);
 71     for(i=0;i<len;i++)
 72     {
 73         snake[i][0]=N/2;
 74         snake[i][1]=N/2+i;
 75         gotoxy(snake[i][0],snake[i][1]);
 76         color(14);
 77         cout<<"★"<<endl;
 78     }
 79     //进入消息循环
 80     while(1)
 81     {
 82         tail[0]=snake[len-1][0];
 83         tail[1]=snake[len-1][1];
 84         gotoxy(tail[0],tail[1]);
 85         color(11);
 86         cout<<"■"<<endl;
 87         for(i=len-1;i>0;i--)
 88         {
 89             snake[i][0]=snake[i-1][0];
 90             snake[i][1]=snake[i-1][1];
 91             gotoxy(snake[i][0],snake[i][1]);
 92             color(14);
 93             cout<<"★"<<endl;
 94         }
 95         char origch=ch;
 96         if(kbhit())
 97         {
 98             gotoxy(0,N+2);
 99             ch=getche();
100         }
101         if((origch==‘w‘&&ch==‘s‘)||(origch==‘s‘&&ch==‘w‘)||(origch==‘a‘&&ch==‘d‘)||(origch==‘d‘&&ch==‘a‘))
102         ch=origch;
103         switch(ch)
104         {
105             case ‘w‘:snake[0][1]--;break;
106             case ‘s‘:snake[0][1]++;break;
107             case ‘a‘:snake[0][0]--;break;
108             case ‘d‘:snake[0][0]++;break;
109             default: break;
110         }
111         int i;
112         //撞到自身失败
113         for(i=1;i<len;i++)
114         {
115             if(snake[0][0]==snake[i][0]&&snake[0][1]==snake[i][1]&&len>3)
116             {
117                 gotoxy(N/2,N/2);
118                 color(30);
119                 cout<<"失败！！！"<<endl;
120                 for(i=0;i<len;i++)
121                 free(snake[i]);
122                 Sleep(INFINITE);
123                 exit(0);
124             }
125         }
126         gotoxy(snake[0][0],snake[0][1]);
127         color(14);
128         cout<<"★"<<endl;
129         Sleep(abs(200-0.5*score));
130         //吃掉苹果后蛇分数加1，蛇长加1
131         if(snake[0][0]==apple[0]&&snake[0][1]==apple[1])
132         {
133             score++;
134             len++;
135             snake=(int**)realloc(snake,sizeof(int*)*len);
136             snake[len-1]=(int*)malloc(sizeof(int)*2);
137             int flag=1;
138             do
139             {
140                 flag=1;
141                 apple[0]=rand()%(N-2)+2;
142                 apple[1]=rand()%(N-2)+2;
143                 for(i=0;i<len;i++)
144                 {
145                     if(apple[0]==snake[i][0]&&apple[1]==snake[i][1])
146                     flag=0;
147                 }
148             }
149             while(!flag);
150             gotoxy(apple[0],apple[1]);
151             color(12);
152             cout<<"●"<<endl;
153             gotoxy(N+5,3);
154             color(20);
155             cout<<score<<endl;
156         }
157         //撞到围墙后失败
158         if(snake[0][1]==0||snake[0][1]==N||snake[0][0]==0||snake[0][0]==N)
159         {
160             gotoxy(N/2,N/2);
161             color(30);
162             cout<<"失败！！！"<<endl;
163             for(i=0;i<len;i++)
164             free(snake[i]);
165             Sleep(INFINITE);
166             exit(0);
167         }
168
169     }
170     return 0;
171 }