How i have to configure VS Code to don't get a “undefined reference” error message?

My work environment :

EDI: Visual Studio Code

C ++ Compiler: GCC

Extensions:

Microsoft C / C ++

.run Code Runner

My source code :

main.cpp

#include <iostream>
#include "personne.h"

int main() {

 personne jojo("fabien");

 std::cout <<"la personne s'appelle "<<jojo.get_nom()<<" et a " 
 <<jojo.get_age()<<" ans "<<std::endl;

 personne titi("lena",3);

 std::cout <<"la personne s'appelle "<<titi.get_nom()<<" et a " 
 <<titi.get_age()<<" ans "<<std::endl;
}

personne.cpp

#include "personne.h"

std::string personne::get_nom() {
    return nom;
}
int personne::get_age() {
    return age;
}

personne::personne(std::string n){
    nom=n;
    age=0;
}

personne::personne(std::string n, int a) {
    nom=n;
    age=a;
}

personne.h

#ifndef __PERSONNE__
#define __PERSONNE__

#include <string>

class personne {
    std::string nom;
    int age;enter code here

public :
    std::string get_nom();
    int get_age();

    personne(std::string);
    personne(std::string, int);
};

#endif // __PERSONNE__

Errors messages :

Windows PowerShell Copyright © Microsoft Corporation. Tous droits réservés.

PS T:\VSCC++\LEssentiel> cd "t:\VSCC++\LEssentiel\chapitre 2 la programmation orientee objets\la_zim" ; if ($?) { g++ main.cpp -o main } ; if ($?) { .\main } C:\Users\Pierre\AppData\Local\Temp\ccKhfKRw.o:main.cpp:(.text+0x4e): undefined reference to personne::personne(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)' C:\Users\Pierre\AppData\Local\Temp\ccKhfKRw.o:main.cpp:(.text+0x72): undefined reference to personne::get_age()’ C:\Users\Pierre\AppData\Local\Temp\ccKhfKRw.o:main.cpp:(.text+0x87): undefined reference to personne::get_nom[abi:cxx11]()' C:\Users\Pierre\AppData\Local\Temp\ccKhfKRw.o:main.cpp:(.text+0x137): undefined reference to personne::personne(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, int)’ C:\Users\Pierre\AppData\Local\Temp\ccKhfKRw.o:main.cpp:(.text+0x15b): undefined reference to personne::get_age()' C:\Users\Pierre\AppData\Local\Temp\ccKhfKRw.o:main.cpp:(.text+0x170): undefined reference to personne::get_nomabi:cxx11’ collect2.exe: error: ld returned 1 exit status PS T:\VSCC++\LEssentiel\chapitre 2 la programmation orientee objets\la_zim>

[babu-thomas]

Hello @Pierre8r ,

The errors are due to personne.cpp not being compiled and linked with main.cpp. As far as I can tell, your current run command only compiles main.cpp. main.cpp includes the personne.h file but during linking g++ can’t find the definitions of the class functions because they are in personne.cpp.

To fix this change your run command for cpp in code-runner.executorMap to:

"code-runner.executorMap": {
        "cpp": "cd $dir && g++ -o $fileNameWithoutExt *.cpp && $dir$fileNameWithoutExt"
}

This command will compile and link all your .cpp files in the directory, and then run the compiled program.

If the above command doesn’t work, then also attach your settings.json file in your comment so that I can better figure out what’s going wrong.

[formulahendry]

Thanks @babu-thomas ! Closing this now. @Pierre8r , Feel free to reopen or create new issue if you have question.