c++远征之封装片（下）练习题，小人走迷宫，做了点改进

//maze.h

using namespace std;
const int SEC = CLOCKS_PER_SEC;

static const int row = 20;//迷宫大小
static const int column = 20;
enum{north=1,south=2,west=3,east=4};
enum{fast=1,slow=2};
enum{wall='0',road=' ',eage='1'};
enum{turnRight,turnLeft,turnBack};

class mazePerson
{
private:
char name;
int startx;//开始位置
int starty;
int px;//当前位置
int py;
int dir;//小人的朝向
public:
mazePerson(char name,int sx,int sy,int d);
~mazePerson();
void setDir(int turn);
char getName(){return name;};
int getStartx(){return startx;}
int getStarty(){return starty;}
int getPx(){return px;};
int getPy(){return py;};
int getDir(){return dir;};

void moveFront();

};

class Maze
{
char map[row][column];
mazePerson per;

public:
Maze(char arr[row][column],char p,int sx,int sy,int d);
Maze();
~Maze();
void changeMap();
bool move();
bool isStartxy();
bool isExit();//是否到达出口
char getRight();//读取右边信息
char getLeft();//读取左边信息
char getFront();//读取前方信息
//char getRear();
void disMap();
void start(int speed);

};

//maze.cpp

static int steps = 0;
//结构函数，初始化小人
mazePerson::mazePerson(char n,int sx,int sy,int d)
{
name = n;
startx = sx;
starty = sy;
px = startx;
py = starty;
dir = d;
}

mazePerson::~mazePerson()
{

}
//重新设置小人方向(turnLeft左转， turnBack向后转，else右转
void mazePerson::setDir(int turn)
{
switch(dir)
{
case north:
if(turn == turnLeft)
dir = west;
else if(turn == turnBack)
dir = south;
else
dir = east;
break;
case south:
if(turn == turnLeft)
dir = east;
else if(turn == turnBack)
dir = north;
else
dir = west;
break;
case west:
if(turn == turnLeft)
dir = south;
else if(turn == turnBack)
dir = east;
else
dir = north;
break;
case east:
if(turn == turnLeft)
dir = north;
else if(turn == turnBack)
dir = west;
else
dir = south;
break;
}
}
//往前移动
void mazePerson::moveFront()
{
switch(dir)
{
case north:px--;
break;
case south:px++;
break;
case west:py--;
break;
case east:py++;
break;
}
}
//结构函数，初始化迷宫
Maze::Maze(char arr[row][column],char name,int sx,int sy,int d):
per(name,sx,sy,d)
{
int i,j;
for(i=0;i<row;i++)
strcpy(map[i],arr[i]);
map[per.getStartx()][per.getStarty()] = per.getName();
}

Maze::~Maze()
{
cout << "you get it!\n";
}
//shifou shi kaishi weizhi
bool Maze::isStartxy()
{
if(per.getStartx()==per.getPx() && per.getStarty()==per.getPy())
return true;
else
return false;
}
//判断是否到达出口
bool Maze::isExit()
{
if(isStartxy()&&steps == 0)
return false;
else if(getLeft()==eage getRight()==eage getFront()==eage)
return true;
}
//输出迷宫信息（地图和小人位置）
void Maze::disMap()
{
int i,j;
for(i=0;i<row;i++)
{
cout << map[i] << endl;
}
}
//读取小人左右和前方的信息
char Maze::getRight()
{
switch(per.getDir())
{
case north:return map[per.getPx()][per.getPy()+1];
break;
case south:return map[per.getPx()][per.getPy()-1];
break;
case west:return map[per.getPx()-1][per.getPy()];
break;
case east:return map[per.getPx()+1][per.getPy()];
break;
}
}
char Maze::getLeft()
{
switch(per.getDir())
{
case north:return map[per.getPx()][per.getPy()-1];
break;
case south:return map[per.getPx()][per.getPy()+1];
break;
case west:return map[per.getPx()+1][per.getPy()];
break;
case east:return map[per.getPx()-1][per.getPy()];
break;
}
}
char Maze::getFront()
{
switch(per.getDir())
{
case north:return map[per.getPx()-1][per.getPy()];
break;
case south:return map[per.getPx()+1][per.getPy()];
break;
case west:return map[per.getPx()][per.getPy()-1];
break;
case east:return map[per.getPx()][per.getPy()+1];
break;
}
}

//移动小人，并更新迷宫信息
bool Maze::move()
{

if(getRight()==road)//如果右边有路，右转
{
    per.setDir(turnRight);
    map[per.getPx()][per.getPy()] = road;
    per.moveFront();
    changeMap();
}
else if(getFront()==road)//如果前方有路，直走
{
    map[per.getPx()][per.getPy()] = road;
    per.moveFront();
    changeMap();
}
else if(getLeft()==road)
{
    per.setDir(turnLeft);//如果左边有路，左转
    map[per.getPx()][per.getPy()] = road;
    per.moveFront();
    changeMap();
}
else if(getRight()==wall&&getLeft()==wall&&getFront()==wall)
{
    per.setDir(turnBack);//如果左右前都是墙向后转
    return false;
}
return true;

}
//开始走迷宫，speed(fast/slow)代表速度
void Maze::start(int speed)
{
for(;!isExit();)
{
system("cls");
if(move())
steps++;
disMap();
clock_t time = clock();
for(;clock()-time < speed * SEC / 5;);
}
if(isStartxy())//如果走回开始位置，地图错误
{
cout << "Map error!Dont have exit!";
return;
}
else
cout << "恭喜你，用了" << steps << "步" << endl;
}
//更新小人位置
void Maze::changeMap()
{
map[per.getPx()][per.getPy()] = per.getName();
}

//main.cpp

/*
Maze(char arr[row][column],char p,int sx,int sy,int d);
初始化迷宫类
参数1：地图（自己随便设置，3，4，5参数要自己改）
参数2：表示小人的字符
参数3，4：开始坐标
参数5：小人的朝向

小人默认是靠右走，如果想靠左走，
把maze里面start函数的第一和第三个if语句交换一下
/
char per ='';
int main(int argc, char *argv[])
{
char arr[row][column] =
{
"1111111111111111111",
"100000000000000001",
"1000000000 00001",
"1000000000 00 00001",
"1000000 00 001",
"100000 0000000 001",
"100000 00000000 001",
"10 00 00 001",
"10 000000 00 00 001",
"10 000000 00 00 001",
"10 0 00 00 001",
"10 0 000000 00 001",
"1 0 0000 000 001",
"10 0 0 00 001",
"10 0 00 0 00 000001",
"10 000 0 00 00001",
"1000000 0 000 00001",
"10 0 00001",
"10 0000000000000001",
"1111111111111111111"
};
Maze maz(arr,per,12,1,east);
maz.start(fast);
cout << "Bye!\n";
return 0;
}