invalid operands to binary expression (string to string (aka basic string))

Question

I get this problem when trying to input a string in a constructor of my class Personne :

Invalid operands to binary expression ('string' (aka 'basic_string<char, char_traits<char>, allocator<char> >') and 'string')

Here are my Files :

Personne.hpp :

#ifndef Personne_hpp
#define Personne_hpp
#include <iostream>
#include <string>
using namespace std;
class Personne{
protected:
string nom;
string prenom,cin,adresse;
public:
// constructeur par défaut:
Personne();
// constructeur par valeur:
Personne(string,string,string,string);
// presenter personne:
void presenter();
// Destructeur:
virtual ~Personne();
};
#endif /* Personne_hpp */

Personne.cpp:

#include "Personne.hpp"

// constructeur :
Personne::Personne(){
    cout<<"entrez le nom de la personne: " <<endl;
    cin>>this->nom;
    cout<<"entrez le prenom de la personne: "<<endl;
    cin>> this->prenom;
    cout<<"entrez le cin de la personne: "<<endl;
    cin>> this->cin;
    cout<<"entrez l'adresse de la personne: "<<endl;
    cin>> this->adresse;
}

This is but one of the reasons why “using namespace std” is considered bad practice. Pretty convincing, no? — user4581301
– user4581301, Commented May 17, 2019 at 0:14

Jonathon K · Accepted Answer · 2019-05-17 00:08:23Z

3

You have a name collision in your class between std::cin and your member string cin. Rename the member.

answered May 17, 2019 at 0:08

Jonathon K

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3 Comments

Lightness Races in Orbit Over a year ago

And stop using using namespace std

Mohammed Chanaa Over a year ago

thank you I just find it more easy to write.. does it make a lot of problems to use the namespace instead of std:: ?

Jonathon K Over a year ago

In the grand scheme of things no... But, as you just experienced, it can cause confusion...

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