迷宮求解

#include <iostream>
#include <vector>
#include <stack>
#include <string>
#include <sstream>
#include <iterator>
using namespace std;

struct PathUnit
{
    int x;
    int y;
    int direct;
};

class MyMaze
{
    vector<vector<int> >vecMaze;
    vector<vector<int> >vecMark;
public:
    MyMaze(int m,int n):vecMaze(m+2,vector<int>(n+2)),vecMark(m+2,vector<int>(n+2))
    {
        for(int i = 0; i < m+2; i++)
        {
            fill(vecMaze[i].begin(),vecMaze[i].end(),1);
        }
    }

    void InitMaze(string strMaze)
    {
        cout<<vecMaze.size()<<" "<<vecMaze[0].size()<<endl;
        istringstream in(strMaze);
        for(int i = 1; i < vecMaze.size(); i++)
        {
            for(int j = 1; j < vecMaze[0].size()-1; j++)
            {
                in>>vecMaze[i][j];
            }
        }
    }

    void ShowMaze()
    {
        for(int i = 0; i < vecMaze.size(); i++)
        {
            copy(vecMaze[i].begin(),vecMaze[i].end(),ostream_iterator<int>(cout,"\t"));
            cout<<endl;
        }
    }

    void GetNextPath(const PathUnit &cur,PathUnit &next)
    {
        next = cur;
        next.direct = 0;
        switch(cur.direct)
        {
            case 0:
            next.x+=1;break;
            case 1:
            next.y+=1;break;
            case 2:
            next.x-=1;break;
            case 3:
            next.y-=1;break;
        }
    }

    bool GetOuter(const PathUnit&u)
    {
        int out_x = vecMaze[0].size()-2;
        int out_y = vecMark.size()-2;

        bool bRet = ((u.x==out_x&&u.y==out_y)?true:false);
        return bRet;
    }

    void GetPath()
    {
        stack<PathUnit>st;
        PathUnit unit;
        unit.x=1;
        unit.y=1;
        unit.direct=0;

        st.push(unit);
        bool bOver = false;
        while(!st.empty())
        {
            PathUnit cur=st.top();
            st.pop();
            PathUnit next;
            while(cur.direct<=3)
            {
                GetNextPath(cur,next);
                if(GetOuter(next))//橫6豎6
                {
                    st.push(cur);
                    st.push(next);
                    bOver = true;
                    break;
                }

                if(!vecMaze[next.y][next.x]&&!vecMark[next.y][next.x])
                {
                    vecMark[next.y][next.x] = 1;
                    st.push(cur);
                    cur= next;
                }
                else{
                    cur.direct++;
                }
            }www.2cto.com
            if(bOver)
                break;
        }
        if(bOver)
        {
            while(!st.empty())
            {
                PathUnit&u = st.top();
                cout<<"("<<u.x<<","<<u.y<<","<<u.direct<<")"<<endl;
                st.pop();
            }
        }
        else
        {
            cout<<"this is no paath"<<endl;
        }
    }
};

int main()
{
    MyMaze m(6,6);
    string s = "";
    s = s +"0 0 1 0 1 1 "+
    "0 1 0 0 1 1 "+
    "0 0 0 1 1 1 "+
    "1 0 1 1 1 1 "+
    "1 0 0 0 0 1 "+
    "1 1 1 1 0 0";

    m.InitMaze(s);
    cout<<"顯示迷宮矩陣"<<endl;
    m.ShowMaze();
    cout<<"顯示路徑"<<endl;
    m.GetPath();
    return 0;
}