Comis Voiajor Vizual

#include <fstream>
#include <climits>
#include <graphics.h>
#include <cmath>
#include <cstring>
#define pi 3.14159265359

using namespace std;

ifstream f("voiajor.in");
ofstream g("voiajor.out");

int l=50,r=200,xc,yc;

int c[100][100],viz[100],n,start;

class oras
{
    int x,y;

    public: constructor(int xd, int yd)
    {
        x=xd;
        y=yd;
    }

    public: void desen()
    {
        line(x-l/2,y-l/2,x-l/2,y+l/2);
        line(x-l/2,y+l/2,x+l/2,y+l/2);
        line(x+l/2,y+l/2,x+l/2,y-l/2);
        line(x+l/2,y-l/2,x-l/2,y-l/2);
    }

    public: void scris(int i)
    {
        char text[10];
        itoa(i,text,10);
        outtextxy(x-l/4,y-l/4,text);
    }

    public: void drum(oras o,int p)
    {
        int dx=o.x-x,dy=o.y-y;
        if (abs(dy/dx)>=1)
            if (dy<0)
                line(x,y-l/2,o.x,o.y+l/2);
            else
                line(x,y+l/2,o.x,o.y-l/2);
        else
            if (dx>0)
                line(x+l/2,y,o.x-l/2,o.y);
            else
                line(x-l/2,y,o.x+l/2,o.y);
        char text[100];
        itoa(p,text,10);
        outtextxy((x+o.x)/2,(y+o.y)/2,text);
    }
};

oras v[100];

void citire()
{
    f>>n;
    int m;
    f>>m>>start;
    for (int i=1;i<=m;i++)
    {
        int x,y,val;
        f>>x>>y>>val;
        c[x][y]=c[y][x]=val;
    }
}

void desenare()
{
    for (int i=1;i<=n;i++)
    {
        int x,y;
        x=xc+r*sin(2*pi*(float)(i-1)/n);
        y=yc-r*cos(2*pi*(float)(i-1)/n);
        v[i].constructor(x,y);
        v[i].desen();
        v[i].scris(i);
    }
    for (int i=1;i<n;i++)
        for (int j=i+1;j<=n;j++)
            v[i].drum(v[j],c[i][j]);
}

void Greedy()
{
    int cost=0,minim,x,y;
    x=start;
    viz[x]=1;
    g<<x<<' ';
    for (int i=1;i<n;i++)
    {
        minim=INT_MAX;
        for (int j=1;j<=n;j++)
            if (j!=x && !viz[j] && c[x][j]<minim)
            {
                minim=c[x][j];
                y=j;
            }
        cost+=c[x][y];
        g<<y<<' ';
        v[x].drum(v[y],c[x][y]);
        getch();
        viz[y]=1;
        x=y;
    }
    v[x].drum(v[start],c[x][start]);
    cost+=c[x][start];
    g<<start<<'\n'<<cost;
}

int main()
{
    initwindow(1000,700);
    xc=getmaxx()/2,yc=getmaxy()/2;

    citire();
    desenare();
    getch();
    setcolor(RED);
    Greedy();

    getch();
    cleardevice();
    closegraph();
    return 0;
}