Poj Solution 1473

http://poj.org/problem?id=1473

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#define sq2 0.70710678118654752440084436210485
#define INF 30000
#define NMAX 52
int p[10]={0};
int as[10]={0};
double xd[8]={0,sq2,1,sq2,0,-sq2,-1,-sq2};
double yd[8]={1,sq2,0,-sq2,-1,-sq2,0,sq2};
double cx,cy;
void findpos(char *s)
{
    s[strlen(s)-1]=0;
    int len;
    char direct[4];
    sscanf(s,"%d%s",&len,direct);
    int d;
    
    if(!strcmp("NE",direct))
        d=1;
    else if(!strcmp("E",direct))
        d=2;
    else if(!strcmp("SE",direct))
        d=3;
    else if(!strcmp("SW",direct))
        d=5;
    else if(!strcmp("W",direct))
        d=6;
    else if(!strcmp("NW",direct))
        d=7;
    else if(!strcmp("N",direct))
        d=0;
    else if(!strcmp("S",direct))
        d=4;
    cx+=xd[d]*len;
    cy+=yd[d]*len;


        
}
int input(char *s)
{
    int i=0;
    do
    {
        
        scanf("%c",&s[i]);
        if(s[i]==',')
        {
            s[i+1]='';
            return 1;
        }
        else if(s[i]=='.')
        {
            s[i+1]='';
            return 2;
        }
        else if(s[i]=='D')
        {
            return 3;
        }
        i++;

    }
    while(1);
}

int main()
{

#if _DEBUG    
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);
#endif
char s[10];

    int flag=0;
    int times=1;
    double dis;
    
//    freopen("in.txt","r",stdin);
//    freopen("out.txt","w",stdout);
    cx=0;
    cy=0;
    while(flag!=3)
    {
        flag=input(s);
        if(flag==1)
        {
            findpos(s);
        }
        if(flag==2)
        {
            findpos(s);
            dis=sqrt(cx*cx+cy*cy);
            printf("Map #%dn",times);
            printf("The treasure is located at (%.3f,%.3f).n",cx,cy);
            printf("The distance to the treasure is %.3f.nn",dis);
            cx=0;
            cy=0;
            times++;
        }
            
    }
    
    

        
#if _DEBUG
    fclose(stdin);
    fclose(stdout);
#endif
    return 1;
}