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Discussion of Problem 1008. Image Encoding

why the result is"Access Violation"!!!!!!!!!!!!!!!
Posted by RoyalTea 20 Jul 2003 18:06
#include<iostream>
using namespace std;
int main()
{
    char a,b,c[10];
    int N,K=0;
    int line[400];
    int open=0,close=0;
    int tx,ty,i=0,j=0;
    bool mat[20][20]={false};
    int  rec[20][20];
    ////////////////////////////////////////////////////////////
//////////////////////////////////////
    for(i=0;i<10;i++)
    {
        for(j=0;j<10;j++)
            rec[i][j]=-1;

    }
    cin>>a>>b>>c;
    if(c[0]>='1'&&c[0]<='9')goto dep1;
    else goto dep2;
dep1:
    K=0;
    N=(int)a-48;
    tx=(int)b-48;ty=(int)c[0]-48;
    mat[tx][ty]=true;
    rec[tx][ty]=0;

    for(i=1;i<N;i++)
    {
        cin>>tx>>ty;
        mat[tx][ty]=true;
    }


    tx=(int)b-48;ty=(int)c[0]-48;
    cout<<tx<<" "<<ty<<endl;
    while(1)
    {
       if(mat[tx+1][ty]==true&&rec[tx+1][ty]==-1)
       {
        cout<<"R";
        line[close++]=tx+1;
        line[close++]=ty;
        rec[tx+1][ty]=0;
        }
        if(mat[tx][ty+1]==true&&rec[tx][ty+1]==-1)
       {
          cout<<"T";
          line[close++]=tx;
          line[close++]=ty+1;
          rec[tx][ty+1]=0;
        }
        if(mat[tx-1][ty]==true&&rec[tx-1][ty]==-1)
        {
            cout<<"L";
            line[close++]=tx-1;
            line[close++]=ty;
            rec[tx-1][ty]=0;
        }
        if(mat[tx][ty-1]==true&&rec[tx][ty-1]==-1)
        {
            cout<<"B";
            line[close++]=tx;
            line[close++]=ty-1;
            rec[tx][ty-1]=0;
        }
        K++;
        if(K==N)
       {
             cout<<"."<<endl;
             break;
       }
       cout<<","<<endl;
       tx=line[open++];
       ty=line[open++];
    }
    goto end;
dep2:
    tx=(int)a-48;ty=(int)b-48;
    mat[tx][ty]=true;
    i=0;
    while(1)
    {
        i=0;
        if(c[i]=='R')
        {
            mat[tx+1][ty]=true;
            i++;
            line[close++]=tx+1;
            line[close++]=ty;
        }
        if(c[i]=='T')
        {
            mat[tx][ty+1]=true;
            i++;
            line[close++]=tx;
            line[close++]=ty+1;
        }
        if(c[i]=='L')
        {
            mat[tx-1][ty]=true;
            line[close++]=tx-1;
            line[close++]=ty;
            i++;
        }
        if(c[i]=='B')
        {
            mat[tx][ty-1]=true;
            i++;
            line[close++]=tx;
            line[close++]=ty-1;
        }
        if(c[i]==',')
        {
            cin>>c;
            tx=line[open++];
            ty=line[open++];
        }

        if(c[i]=='.')
        {
            K++;
            break;
        }
        else
          K++;

    }
    cout<<K<<endl;
    for(i=0;i<20;i++)
        for(j=0;j<20;j++)
            if(mat[i][j]==true)
                cout<<i<<" "<<j<<endl;

end:
    ;
    }