C语言实现推箱子课程设计：键盘输入与地图操作

#include"stdio.h"
#include"bios.h"
#define LEFT 75
#define RIGHT 77
#define UPPER 72
#define DOWN 80
#define ESC 27
struct Boxss
{
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*/
}

int play(int k)
{

int iKey,x,y,tx,ty,s,i,j;
struct Boxss Box[3];              /*定义箱子数量*/

int chMap[10][10];
int chMap1[10][10]={                          /*定义level1地图*/
                  {0,0,0,0,0,0,0,0,0,0},
                  {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},
                  {0,2,0,1,1,1,1,1,0,0},
                  {0,0,0,0,0,0,0,0,0,0},
                  };                         /*定义level2地图*/
int chMap2[10][10]={
                  {0,0,0,0,0,0,0,0,0,0},
                  {0,0,0,0,0,0,1,1,1,0},
                  {0,0,2,0,0,0,1,1,1,0},
                  {0,0,2,0,0,0,1,1,1,0},
                  {0,0,2,1,1,1,1,0,0,0},
                  {0,0,1,1,0,1,1,0,0,0},
                  {0,0,1,1,0,1,1,1,0,0},
                  {0,0,0,0,0,1,1,1,0,0},
                  {0,0,0,0,0,0,0,0,0,0},
                  {0,0,0,0,0,0,0,0,0,0},
                  };  
int chMap3[10][10]={                         /*定义level3地图*/
                  {0,0,0,0,0,0,0,0,0,0},
                  {0,0,0,0,0,0,0,0,0,0},
                  {0,0,0,0,0,1,1,0,0,0},