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Error on method of Menu Class

Posted on 2003-12-10
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Last Modified: 2010-04-02
Hi boys,
i have an error that i can undestand:

i have a method       " ControlloreClienti::stampaListaClienti(vector<Cliente *> c)"
that take a vector(result of a search) and from this built a string inj witch are appended every item of the vector+"esci"

After i have a class menu that take on input this string and built a textual menu.
My program,in runtime have a block in the line "sceltaCliente.setSceltaUtente();"

I have also another method "  " ,so similar,in witch the same code doesn't give problem

I attach my code below:

void ControlloreClienti::stampaListaClienti(vector<Cliente *> c) {                      
    string s = "";
    for(int i = 0; i < c.size(); i++) {                  
        s.append((c[i])->getCodiceFiscale() +
                 Utility::riempimento(15 - ((c[i])->getCodiceFiscale()).size(), ' ')+
                 (c[i])->getNome() +
                 Utility::riempimento(15 - ((c[i])->getNome()).size(), ' ') +
                 (c[i])->getCognome() +
                 Utility::riempimento(15 - ((c[i])->getCognome()).size(), ' ') +
                 (c[i])->getVia() +
                 Utility::num2string((c[i])->getNumeroCivico()) +
                 Utility::riempimento(15 - (Utility::num2string((c[i])->getNumeroCivico())).size(), ' ') +
                 Utility::num_long2string((c[i])->getCap()) +
                 Utility::riempimento(15 - ((c[i])->getVia()).size(), ' ') +
                 (c[i])->getCitta() +
                 Utility::riempimento(15 - ((c[i])->getCitta()).size(), ' ') +        
                 (c[i])->getProvincia() +
                 Utility::riempimento(15 - ((c[i])->getProvincia()).size(), ' ') +
                 (c[i])->getNazione() +
                 Utility::riempimento(15 - ((c[i])->getNazione()).size(), ' ') +
                 Utility::num_long2string((c[i])->getNumeroCartaCredito()) +
                 Utility::riempimento(15 - (Utility::num_long2string((c[i])->getNumeroCartaCredito())).size(), ' ') +
                 Utility::num2string((c[i])->getNumeroNoleggi()) +
                 Utility::riempimento(15 - (Utility::num2string((c[i])->getNumeroNoleggi())).size(), ' ') +
                 Utility::num_long2string((c[i])->getChilometriPercorsi()) +
                 Utility::riempimento(15 - (Utility::num_long2string((c[i])->getChilometriPercorsi())).size(), ' ') +
                 Utility::num_long2string((c[i])->getSpesaTotale()) +
                 Utility::riempimento(15 - (Utility::num_long2string((c[i])->getSpesaTotale())).size(), ' ') +
                 (c[i])->getTarga() +
                 Utility::riempimento(15 - ((c[i])->getTarga()).size(), ' '));                        
        s.append("|");                    
    }
    s.append("ESCI");
    Menu sceltaCliente(s, "VISUALIZZA LE INFORMAZIONI DI UN Cliente");
    do {
        system("cls");
        system("pause");
        cout<<s;system("pause");
        sceltaCliente.setSceltaUtente();/* e qui il problema*/system("pause");
        if(sceltaCliente.getSceltaUtente() > 0 && sceltaCliente.getSceltaUtente() <= c.size()) {system("pause");
            (c[sceltaCliente.getSceltaUtente() - 1])->stampaCliente();
            cout << endl << "\n\nCliente " << sceltaCliente.getSceltaUtente()
                         << "   di   " << c.size() << "." << endl;
            system("pause");
        }
    }
    while(sceltaCliente.getSceltaUtente() != 0);
    return;
}


void ControlloreVeicoli::stampaListaVeicoli(vector<Veicolo *> v) {
    string s = "";
    for(int i = 0; i < v.size(); i++) {
        s.append((v[i])->getCategoria() +
                 Utility::riempimento(15 - ((v[i])->getCategoria()).size(), ' ') +
                 (v[i])->getCasaCostruttrice() +
                 Utility::riempimento(15 - ((v[i])->getCasaCostruttrice()).size(), ' ') +
                 (v[i])->getModello() +
                 Utility::riempimento(15 - ((v[i])->getModello()).size(), ' ') +
                 (v[i])->getTarga());
        s.append("|");
    }
    s.append("ESCI");
    Menu scegliVeicolo(s, "VISUALIZZA LE INFORMAZIONI DI UN VEICOLO");
    do {
        system("cls");
        scegliVeicolo.setSceltaUtente();
        if(scegliVeicolo.getSceltaUtente() > 0 && scegliVeicolo.getSceltaUtente() <= v.size()) {
            (v[scegliVeicolo.getSceltaUtente() - 1])->stampaVeicolo();
            cout << endl << "\n\nVeicolo " << scegliVeicolo.getSceltaUtente()
                         << "   di   " << v.size() << "." << endl;
            system("pause");
        }
    }
    while(scegliVeicolo.getSceltaUtente() != 0);
    return;
}
0
Comment
Question by:zprestaz
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7 Comments
 
LVL 13

Expert Comment

by:SteH
ID: 9911197
Can you please show the code for setSceltaUtente () of class Menu.  

A hint: not everyone will understand "e qui il problema" - The problem is here.
0
 

Author Comment

by:zprestaz
ID: 9911206
Code of class menu:

// Menu.cpp

#include "Menu.h"
#include "Utility.h"

//costruttore
Menu::Menu( string o, string t ="", string dv = "20", string ev = "0")
   : sceltaUtente("Seleziona",dv,ev,"-1")
{
  titolo = ( t=="" ? "MENU'" : t );
  escapeValue = ev;
 
  int index;
  do {
     index = o.find("|");
     if ( index != string::npos ) {  // se non ho trovato "|" ...
        opzioni.push_back( o.substr(0,index) );
        o = o.substr(index+1);
     }
     else {
        opzioni.push_back( o );
        o = "";
     }
  } while ( !o.empty() );
}

//la scelta
bool Menu::valutaOpzione()    
{
  if  ( sceltaUtente.getDato() == atoi(escapeValue.c_str()) )
      return true;

  if  ( sceltaUtente.getDato() < 0 || sceltaUtente.getDato() > opzioni.size() )
     return  false;
  else
     return true;
}


//costruzione menù grafico
void Menu::setSceltaUtente( bool clean=true , bool main = false )
{
    do {
        if (clean) system("cls");
        cout << endl;
        cout << Utility::riempimento(lunghezza, '^') << endl;
        cout << ">" << Utility::riempimento(lunghezza - 2, ' ') << "<" << endl;
        cout << ">" << Utility::riempimento((lunghezza - 2 - titolo.size()) / 2, ' ') << titolo;

        cout << (
            titolo.size() % 2 == 1 ?
            Utility::riempimento((lunghezza - titolo.size() - 2) / 2, ' ') :
            Utility::riempimento((lunghezza - titolo.size() - 2) / 2 + 1, ' ')
                 )
            << "<" << endl;

        cout << ">" << Utility::riempimento(lunghezza - 2, ' ') << "<" << endl;
        cout << Utility::riempimento(lunghezza, '^') << endl;
        cout << ">" << Utility::riempimento(lunghezza - 2, ' ') << "<" << endl;
        for(int i = 0; i < opzioni.size() - 1; i++)
                cout << ">      " << i + 1 << " )   " << opzioni[i]
                     << Utility::riempimento(lunghezza - opzioni[i].size() - 14, ' ') << "<" << endl;
        cout << ">" << Utility::riempimento(lunghezza - 2, ' ') << "<" << endl;

        cout << ">      0 )   " << opzioni[opzioni.size() - 1]
             << Utility::riempimento(lunghezza - opzioni[opzioni.size() - 1].size() - 14, ' ')
             << "<" << endl;
        cout << ">" << Utility::riempimento(lunghezza - 2, ' ') << "<" << endl;
        cout << Utility::riempimento(lunghezza, '^') << endl;
        cout << endl;

        sceltaUtente.setDato(false);
    }
    while ( !valutaOpzione() );
}


int Menu::getSceltaUtente()
{
    return sceltaUtente.getDato();
}
0
 
LVL 13

Expert Comment

by:SteH
ID: 9911482
From that piece of code I would look deeper into while (!valutaOpzione()). Does this end? How about sceltaUtente.getData and .setDato?
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Author Comment

by:zprestaz
ID: 9911538
Can you explain better please.......................
do you want another piece of code or what??
0
 
LVL 13

Expert Comment

by:SteH
ID: 9911617
At first I want to give you hints to find the error yourself. Only if this fails I might find the time to get into it more deeply. I suggest you to use a debugger to look at that line and whether it returns "true" at some time. For me knowledge of getDato and setDato prevent me from giving an answer.
0
 

Author Comment

by:zprestaz
ID: 9912131
the point is that in void ControlloreVeicoli::stampaListaVeicoli(vector<Veicolo *> v) the problem doesn't exist....................,but in void ControlloreClienti::stampaListaClienti(vector<Cliente *> c) yes.............
the two methods are so identic......................the problem exists only in runtime...........and in function void ControlloreClienti::stampaListaClienti(vector<Cliente *> c) i've added system("pause") and i've find that the command that block the program is sceltaCliente.setSceltaUtente();

GetDato() and SetDato() are methods of class CasellaInt (derivated from Casella class) that i attack below.These class take data on input and check this input

#include <cmath>
#include "Casella.h"

extern bool admin;

//messaggio della richiesta di input
void Casella::showMessage() {
    if(admin)
        cout << messaggioRichiesta << "  -#>  ";
    else
        cout << messaggioRichiesta << "  -@>  ";
}

//costruttore
Casella::Casella(string mr, string dd, string ec, string d)
{
      messaggioRichiesta = mr;
      defaultDato = dd;
      escapeChar = ec;
      dato = d;

}

//lettura dato da tastiera
void Casella::setDato(bool repeat=true)
{

  do{
    errorMsg=string();
    char buffer[200];        
    showMessage();
    cin.getline(buffer,200,'\n'); //fino al RETURN, max 200 char
    dato = buffer;

    if (dato=="") {
        dato = defaultDato;
        return;
    }
    else
      if (dato!=escapeChar) {
        isValid();         //chiama la funzione virtuale, ovvero quella di ogni classe specifica
        if( Error() && repeat )
        {
//          cout << "\a\nErrore: " << getError() << endl;
//          system("pause");
//          system("cls");
        }
        if(!repeat) return;
      }
  }
  while( repeat && Error() );    

}

bool Casella::Error() {
    return !errorMsg.empty();
}


string Casella::getError()
{
  return errorMsg;
}

// CasellaInt.cpp

#include <cmath>
#include "CasellaInt.h"


     
//controllo specifico per la suddetta classe
void CasellaInt::isValid()
{

  bool esito=true;
  errorMsg=string();
  int start = ( ( dato.at(0) == '-' ) ? 1 : 0 );   //da dove deve partire se c'è il segno meno
  for (int i=start; i<dato.size(); i++)
     if ( !isdigit( dato.at(i) ) )
        {
          errorMsg= "Il dato inserito non e' un numero intero";
          esito=false;
          break;
        }
  if (!esito)
     dato = errorDato;
 
}  
   

   
//costruttore


CasellaInt::CasellaInt(string mr, string dd, string ec, string ed="")
   : Casella(mr,dd,ec,"")
{
      errorDato = ed;
}

//restituzione dato come numero    
int CasellaInt::getDato()
{
  return atoi( dato.c_str() );    //conversione stringa vecchio stile C
}
     

//restituzione dato come stringa

string CasellaInt::getDatoString(){
  return dato;
}
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LVL 13

Accepted Solution

by:
SteH earned 80 total points
ID: 9912245
sceltaCliente.setSceltaUtente(); is called twice but with different menus. Now you say it blocks: this could mean that a loop never ends and there is only one while and one for loop inside which could possibly not end. The for loop has a predefined number ofiterations so you're left with the while loop. But it could be another function call within this function. Without all code it's difficult to tell but I prefer that you try it yourself  and I give some guidance.
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