Question

My main() file does not call to the class created in a .hpp file. It comes out with the error "undefined reference to "___" const.

I want to solve this by only changing the main() .cpp file, not the .hpp file.

.cpp file

include <iostream> include <string> tinclude "CourseMember.hpp using namespace std int main0 CourseMember CourseMember(90, "Jeff", "Goldblum"): // initializing the constructor cout<< "Member ID is <<CourseMember.getID) << endl; 1/ calling getID) accessor cout <<"First Name is " << CourseMember.getFirstName << endl; // calling getFirstName) accessor cout<< "Last Name is <CourseMember.getLastName () << endl; // calling getLastName() accessor return 0;

.hpp file

Thank you!

Answer 1

The main error is that you created the .hpp file. In this file you just initialize the CourseMember class but you not implemented that class in other cpp file so here is the full code with output

main.cpp

#include<iostream>

#include"CourseMember.hpp"

using namespace std;

int main()

{

CourseMember courseMember(90,"Jeff","Goldblum");

cout<<"Member id is: "<<courseMember.getId()<<endl;

cout<<"First name is: "<<courseMember.getFirstName()<<endl;

cout<<"Lasr name is: "<<courseMember.getLastName()<<endl;

return 0;

}

CourseMember.hpp

#ifndef CourseMember_hpp

#define CourseMember_hpp

#include<string>

class CourseMember

{

public:

CourseMember(int id,std::string first,std::string last);

int getId() const;

std::string getFirstName() const;

std::string getLastName() const;

private:

int id;

std::string first_name;

std::string last_name;

};

#endif

CourseMember.cpp

#include"CourseMember.hpp"

CourseMember::CourseMember(int id,std::string first,std::string last)

{

this->first_name=first;

this->last_name=last;

this->id=id;

}

std::string CourseMember::getFirstName() const

{

return this->first_name;

}

std::string CourseMember::getLastName() const

{

return this->last_name;

}

int CourseMember::getId() const

{

return this->id;

}

Output

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D. course Member error sohing-Microsoft Visual Studio FILE EDIT VIEW PROJECT BUILD DEBUG TEAM SQL TOOLS TEST ARCHITECTURE ANALYZE WINDOW HELP Quick Launch (Ctrl+Q) 0 , a a .2 Local Windows Debugger, Debug X CourseNumber.cpp Solution Explorer (Global Scope) #includec iostream» #include "cour Search Solution Explorer (Ctri+) error solving' (1 project) using namespa error solving ember id is: 98 First name is: Jeff Lasr name is: Goldblum Press any key to continue Eint main) r.hpp cout<<"Me cout<<"Fi cout<<"La return e er.cpp View Output Show output from: B 1>--Build st 1> nain.cpp 1> CourseNunber 1> Generating Co 1 Course Member Build: Error List Output Build succeeded O Type here to search ←回匀農 23:03 02-02-2019