原题链接：http://acm.hdu.edu.cn/showproblem.php?pid=1033

#include <iostream>
#include <cstdlib>
using namespace std;
const int MAX = 300;
typedef struct
{
    int x,y;
}point;
int main()
{
    char str[MAX]=" ";
    while(cin >> str)
    {
        point p;
        p.x = 310;
        p.y = 420;
        int len = strlen(str);
        cout << "300 420 moveto\n310 420 lineto\n";
        int dir = 1;
        for(int i = 0;i < len;i++)
        {
            switch(dir)
            {
                case 1:
                    if(str[i] == 'A')
                    {
                        dir = 4;
                        p.y -= 10;
                    }
                    if(str[i] == 'V')
                    {
                        dir = 2;
                        p.y+=10;
                    }
                break;
                case 2:
                    if(str[i] == 'A')
                    {
                        dir = 1;
                        p.x += 10;
                    }
                    if(str[i] == 'V')
                    {
                        dir = 3;
                        p.x-=10;
                    }
                break;

                case 3:
                    if(str[i] == 'A')
                    {
                        dir = 2;
                        p.y += 10;
                    }
                    if(str[i] == 'V')
                    {
                        dir = 4;
                        p.y -= 10;
                    }
                break;
                case 4:
                    if(str[i] == 'A')
                    {
                        dir = 3;
                        p.x -= 10;
                    }
                    if(str[i] == 'V')
                    {
                        dir = 1;
                        p.x+=10;
                    }
                break;
            }
            cout << p.x << " " << p.y << " lineto\n";//不要再使用ends
        }
        cout << "stroke\nshowpage\n";
        strcpy(str," ");
    }
    return 0;
}

hdu_1033_Edge（模拟）