菜鸟学C++：做一个最最简单的贪吃蛇游戏

#include<iostream>
#include<windows.h>
#include<time.h>
#include<conio.h>
#define HEIGHT 20
#define WIDTH 20
using namespace std;
void setMap(char maps[HEIGHT][WIDTH]) 
{
      int i,j;
      for(i=0;i<=WIDTH-1;i++)
      {
            maps[0][i]=‘-‘;
            maps[HEIGHT-1][i]=‘-‘;
      }
      for(j=1;j<=HEIGHT-2;j++)
      {
            maps[j][0]=‘|‘;
            maps[j][WIDTH-1]=‘|‘;
      }

      for(i=1;i<=HEIGHT-2;i++)
      {
            for(j=1;j<=WIDTH-2;j++)
                  maps[i][j]=‘ ‘;
      }

}
void showMap(char maps[HEIGHT][WIDTH])
{
      int i,j;
        for(i=0;i<HEIGHT;i++){
            cout << "\t";
            for(j=0;j<WIDTH;j++)
                  cout<<maps[i][j]<<‘ ‘;    //
                  cout<<endl;
      }
}

void countdown()
{
      int i,j;
      long   start;
      int timeover=1;

      for(i=2;i>=0;i--)
      {
            start=clock();
            while(clock()-start<=1000);
            system("cls");
            cout<<"The game is going to START! "<<i<<"s"<<endl;
      }
}
void initialization(int pos[2][100])
{
      for(int i=0;i<4;i++)
      {
            pos[0][i]=1;
            pos[1][i]=i+1;
      }
}
void setFood(char maps[HEIGHT][WIDTH],int *x,int *y)
{

}
int main()
{
      countdown();//倒计时
      char maps[HEIGHT][WIDTH];
      setMap(maps);//设置地图
      int tcsPos[2][100];
      initialization(tcsPos);//初始化蛇的位置

      int i,j;
      int head=3,tail=0;
      for(i=1;i<=3;i++)
            maps[1][i]=‘*‘;
      maps[1][4]=‘#‘; //初始化蛇身
      int x1,y1;

      srand(time(0));
      do
      {
            x1=rand()%20+1;
            y1=rand()%20+1;
      }while(maps[x1][y1]!=‘ ‘);
      maps[x1][y1]=‘*‘;
       system("cls");

      showMap(maps);//画地图+蛇

      char direction = 77;//右
      int x,y;
      while(1)
      {
            int timeover=1;
            long start=clock();
            while((timeover=(clock()-start<=900))&&!kbhit());
            if(timeover){
                  getch();direction=getch();
            }
            switch(direction){
                  case 72:x=tcsPos[0][head]-1;y=tcsPos[1][head];break;//上
                  case 80:x=tcsPos[0][head]+1;y=tcsPos[1][head];break;//下
                  case 75:x=tcsPos[0][head];y=tcsPos[1][head]-1;break;//左
                  case 77:x=tcsPos[0][head];y=tcsPos[1][head]+1;;//右
            }
            if(!(direction==72||direction==80||direction==75 ||direction==77)) //  按键非方向键
                  {cout << "\tGame over!" << endl;return 0;}
            if(maps[x][y]!=‘ ‘&&!(x==x1&&y==y1))
            {
                  cout<<"\tGame over!"<<endl;return 0;
            }
            if(x==x1&&y==y1)
            {
                  maps[x][y]=‘#‘;
                  maps[tcsPos[0][head]][tcsPos[1][head]]=‘*‘;
                  head=head+1;
                  tcsPos[0][head]=x;
                  tcsPos[1][head]=y;
                  do                //画米粒
                  {
                        x1=rand()%20+1;
                        y1=rand()%20+1;
                  }while(maps[x1][y1]!=‘ ‘);
                  maps[x1][y1]=‘*‘;
                  system("cls");
                  showMap(maps);
            }
            else
            {
                  maps[tcsPos[0][tail]][tcsPos[1][tail]]=‘ ‘;
                  tail=(tail+1)%100;
                  maps[tcsPos[0][head]][tcsPos[1][head]]=‘*‘;
                  head=(head+1)%100;
                  tcsPos[0][head]=x;
                  tcsPos[1][head]=y;
                  maps[tcsPos[0][head]][tcsPos[1][head]]=‘#‘;
                  system("cls");
                  showMap(maps);
            }
      }
      return 0;
}