#include"stdio.h"
#include"bios.h"
#define LEFT 75
#define RIGHT 77
#define UPPER 72
#define DOWN 80
#define ESC 27
struct Boxss        /*定义箱子结构体,其中包含坐标属性*/
{
int x,y;
};
union keyboard      /*定义读取键盘码的共用体类型*/
{
unsigned int iKeyInfo;
char chKeyBit[2];
};
int fnGetKey(void)  /*定义读取键盘码的函数*/
{
union keyboard uniKey1;    /*定义读取键盘码的共用体变量*/
while(bioskey(1)==0);      /*检测用户是否按键*/
uniKey1.iKeyInfo=bioskey(0);           /*读取按键信息*/
return(uniKey1.chKeyBit[0]==0?uniKey1.chKeyBit[1]:uniKey1.chKeyBit[0]);  /*返回ASCII码或扩充码*/
}
void main()
{
int iKey,x=11,y=6,tx=11,ty=6;       /*x,y为人物移动后坐标,tx,ty为人物移动前坐标*/
struct Boxss Box[4];                /*定义箱子数量*/
int chMap[10][10]={                 /*用二维数组定义地图*/
                  {0,0,0,0,0,0,0,0,0,0},          /*0表示墙1表示路2表示目标*/
                  {0,1,0,0,0,0,1,1,1,0},
                  {0,1,0,2,0,0,1,0,1,0},
                  {0,1,0,1,0,0,1,0,1,0},
                  {0,1,1,1,0,0,1,0,1,0},
                  {0,1,0,0,0,0,1,0,1,0},
                  {0,1,1,1,1,1,1,0,1,0},
                  {0,1,0,1,0,0,0,0,2,0},
                  {0,2,0,1,1,1,1,2,0,0},
                  {0,0,0,0,0,0,0,0,0,0},
                  };
int i,j;
Box[0].x=13;       /*定义箱子的坐标属性*/
Box[1].x=11;
Box[2].x=14;
Box[3].x=18;
Box[0].y=8;
Box[1].y=7;
Box[2].y=13;
Box[3].y=7;
  while(1)                 /*反复进行求移动的坐标运算*/
  {
  for(i=0;i<10;i++)       /*输出新地图(刷新地图)*/
    {
    gotoxy(10,5+i);
    for(j=0;j<10;j++)
      {
      if(chMap[i][j]==0)
        printf("#");
      if(chMap[i][j]==1)
        printf(" ");
      if(chMap[i][j]==2)
        printf("X");
      }
    }
  j=0;                                       /*判断是否所有箱子都在目标坐标上*/
  for(i=0;i<4;i++)
    if(chMap[Box[i].y-5][Box[i].x-10]==2)
    j++;
  if(j==4)                                   /*如果所有箱子都就位输出"YOU WIN!"退出*/
      {
      clrscr();
      printf("You Win!");
      break;
      }
  for(i=0;i<4;i++)                           /*在起始(或移动后)的坐标输出箱子*/
    {
    gotoxy(Box[i].x,Box[i].y);
    printf("0");
    }
  gotoxy(x,y);                               /*在起始(或移动后)的坐标输出人*/
  printf("*\b");
  tx=x;                                      /*记录本次移动前的坐标*/
  ty=y;
  iKey=fnGetKey();
  if(iKey==LEFT&&chMap[y-5][x-1-10]!=0)      /*按读取的按键信息改变坐标如果改变的坐标和墙(0)重合则不改变*/
    x--;
  if(iKey==RIGHT&&chMap[y-5][x+1-10]!=0)
    x++;
  if(iKey==UPPER&&chMap[y-1-5][x-10]!=0)
    y--;
  if(iKey==DOWN&&chMap[y+1-5][x-10]!=0)
    y++;                                    /*输入ESC退出并输出"YOU LOST"*/
  if(iKey==ESC)
  {
  clrscr();
  printf("You Lost");
  break;
  }
  for(i=0;i<4;i++)                          /*如果移动后的人的坐标与箱子坐标重合,则改变箱子坐标向前一格*/
    if(Box[i].x==x&&Box[i].y==y)
      {
      Box[i].x+=(x-tx);
      Box[i].y+=(y-ty);
    if(chMap[Box[i].y-5][Box[i].x-10]==0)   /*如果移动后的箱子坐标会出现在墙上,则使箱子坐标和人坐标都返回移动前的值*/
      {
      Box[i].x-=(x-tx);
      Box[i].y-=(y-ty);
      x=tx;
      y=ty;
      }
      break;
      }
  clrscr();
  }
getch();
}

问题：#define LEFT 75
#define RIGHT 77
#define UPPER 72
#define DOWN 80
这部分是ASC||码？码 网上查不到....