Chaîne erreur membre statique

Question

Je fais un programme de base qui prend une entrée et l'imprime en arrière, mais je reçois étrange erreur de mon variable.Please statique me aider out.Thanks

code:

/* 

    Date:5th January 2011 
    Programmer:Fahad 
*/ 
#include <iostream> 
#include <string> 
using namespace std; 
class Persons //A class that will store the name,addresses and id numbers of the users 
{ 
    private: 
     string name_; 
     string address_; 
     int id_number_; 

    public: 
     static int count;//This is the count of the objects created 
     Persons(); 
     void getData(int n); 
     void displayData(int n); 
     //~Persons(); 
}; 
static int count;//initializing the static member 
int main() 
{ 
    cout << "Enter Number Of Persons:"; 
    int n;//This is the number of objects that the user wants to make. 
    cin >> n; 
    Persons *ptr;//A pointer that will be used for the dynamic memory allocation. 

    /*Exception Handling*/ 
    //////////////////////////////////////////////////////////////////// 
    try 
    { 
     //ptr=new [sizeof(Persons) * n]; 
     ptr=new Persons[n]; 
    } 
    catch(bad_alloc xa) 
    { 
     cout<<"Sorry,Program Can Not Continue"; 
     cin.get(); 
     exit(1); 
    } 
    ///////////////////////////////////////////////////////////////////// 
    for(int i = 0; i< n; i++) 
    { 
     ptr[i].getData(n); 
    } 
    for(int j = 0; j< n; j++) 
    { 
     ptr[j].displayData(n); 
    } 
    cin.get(); 
    delete[] ptr; 
    return 0; 
} 
/*Function Definitions*/ 
Persons::Persons() 
{ 
    name_=""; 
    address_=""; 
    id_number_=0; 
    count++; 
} 
void Persons::getData(int n) 
{ 

     cout<<"Enter Name (Press '$' To Exit):"; 
     getline(cin,name_,'$'); 
     cout<<endl<<"Enter Address (Press '$' To Exit):"; 
     getline(cin,address_,'$'); 
     cout<<endl<<"Enter Identitiy Card Number:"; 
     cin>>id_number_; 

} 
void Persons::displayData(int n) 
{ 

     cout<<"Name:"<<name_; 
     cout<<endl<<"Address:"<<address_; 
     cout<<endl<<"Identitiy Card Number:"<<id_number_; 

} 

erreur:

------ Build started: Project: new, Configuration: Debug Win32 ------ 
Compiling... 
program.cpp 
c:\documents and settings\1\my documents\visual studio 2008\projects\new\new\program.cpp(23) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 
Build log was saved at "file://c:\Documents and Settings\1\My Documents\Visual Studio 2008\Projects\new\new\Debug\BuildLog.htm" 
new - 1 error(s), 0 warning(s) 
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== 
? 

Answer 1

au lieu de

static int count;//initializing the static member 

écrire

int Persons::count; 

Answer 2

Vous devez définir la variable statique int Persons::count; en outre, votre getData &La syntaxe 210 est incorrecte. Vous devez utiliser l'opérateur -> au lieu de l'opérateur ..

Answer 3

Votre programme a deux problèmes

Problème n ° 1) de déclaration manquante pour exit(1);.
Solution: Inclure <cstdlib>

Problème no 2) membre statique count déclaré mais non défini.
Solution: Définissez le membre comme int Persons::count; au lieu de static int count.