g++ compiler and error undefined reference












-2














i use linux and g++ compiler for cplusplus and i made a class called Command.h with Command.cpp. my code is below



main.cpp



#include <iostream>
#include <string>
#include <ctime>

#include "./people.h"
#include "./Command.h"

using namespace std;
int main() {


string CMD="";
cout << "Type Your Valid Command To Do Action"<<endl << " help To show help-Menunn";

bool ConTact(false);

BeGiN:
do{

cin >> CMD;
Cmd CODE(CMD);
}while((cin>>CMD));


while(!(cin>>CMD)){
cout << "Unvalid Input :)nn";

goto BeGiN;
}

}


and my Command.h



#pragma once
#include <iostream>
#include <string>


using namespace std;

class Cmd{
public:
Cmd(string);
void Help();

private:
string _name;
};


and my Command.cpp:



#include <iostream>
#include <string>
#include "./Command.h"



Cmd::Cmd(string code ){
cout <<" hi n";

if(code =="help");//show help menu ;
else if(code=="add");//show add contact menu
else if(code=="rm"); // show remove contact menu
else if(code=="change"); //show change menu
else if(code=="ls"); //show list of types of contacts
else if(code=="ls-l"); //show list of favorit contact
else if(code=="ls-f"); //show list of family contact
else if(code=="ls-d"); //show list of friends contact
else if(code=="ls-fe"); //show list of female contact
else if(code=="ls-ma"); //show list of male contact
else if(code=="ls-best"); //show list of 10 best favorite contact
else if(code=="ls-last"); //show list of 10 lastest added contact
else if(code=="ls-d"); //show list of friends contact


}



when i typed g++ main.cpp in terminal a strange error occurred



/usr/bin/ld: /tmp/ccWpq3Ix.o: in function `main':
main.cpp:(.text+0xc6): undefined reference to
`Cmd::Cmd(std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >)'
collect2: error: ld returned 1 exit status


what should i do??
i used visual studio code.










share|improve this question







New contributor




mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
















  • 1




    Welcome to Code Review. I'm afraid this question does not match what this site is about. Code Review is about improving existing, working code. Code Review is not the site to ask for help in fixing or changing what your code does. Once the code does what you want, we would love to help you do the same thing in a cleaner way! Please see our help center for more information.
    – Heslacher
    39 mins ago










  • CodeReview reviews working code, so this question is off-topic here. Try asking on stackoverflow.com instead.
    – user673679
    38 mins ago










  • @user673679 SO won't accept this question either.
    – Mast
    21 mins ago
















-2














i use linux and g++ compiler for cplusplus and i made a class called Command.h with Command.cpp. my code is below



main.cpp



#include <iostream>
#include <string>
#include <ctime>

#include "./people.h"
#include "./Command.h"

using namespace std;
int main() {


string CMD="";
cout << "Type Your Valid Command To Do Action"<<endl << " help To show help-Menunn";

bool ConTact(false);

BeGiN:
do{

cin >> CMD;
Cmd CODE(CMD);
}while((cin>>CMD));


while(!(cin>>CMD)){
cout << "Unvalid Input :)nn";

goto BeGiN;
}

}


and my Command.h



#pragma once
#include <iostream>
#include <string>


using namespace std;

class Cmd{
public:
Cmd(string);
void Help();

private:
string _name;
};


and my Command.cpp:



#include <iostream>
#include <string>
#include "./Command.h"



Cmd::Cmd(string code ){
cout <<" hi n";

if(code =="help");//show help menu ;
else if(code=="add");//show add contact menu
else if(code=="rm"); // show remove contact menu
else if(code=="change"); //show change menu
else if(code=="ls"); //show list of types of contacts
else if(code=="ls-l"); //show list of favorit contact
else if(code=="ls-f"); //show list of family contact
else if(code=="ls-d"); //show list of friends contact
else if(code=="ls-fe"); //show list of female contact
else if(code=="ls-ma"); //show list of male contact
else if(code=="ls-best"); //show list of 10 best favorite contact
else if(code=="ls-last"); //show list of 10 lastest added contact
else if(code=="ls-d"); //show list of friends contact


}



when i typed g++ main.cpp in terminal a strange error occurred



/usr/bin/ld: /tmp/ccWpq3Ix.o: in function `main':
main.cpp:(.text+0xc6): undefined reference to
`Cmd::Cmd(std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >)'
collect2: error: ld returned 1 exit status


what should i do??
i used visual studio code.










share|improve this question







New contributor




mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
















  • 1




    Welcome to Code Review. I'm afraid this question does not match what this site is about. Code Review is about improving existing, working code. Code Review is not the site to ask for help in fixing or changing what your code does. Once the code does what you want, we would love to help you do the same thing in a cleaner way! Please see our help center for more information.
    – Heslacher
    39 mins ago










  • CodeReview reviews working code, so this question is off-topic here. Try asking on stackoverflow.com instead.
    – user673679
    38 mins ago










  • @user673679 SO won't accept this question either.
    – Mast
    21 mins ago














-2












-2








-2







i use linux and g++ compiler for cplusplus and i made a class called Command.h with Command.cpp. my code is below



main.cpp



#include <iostream>
#include <string>
#include <ctime>

#include "./people.h"
#include "./Command.h"

using namespace std;
int main() {


string CMD="";
cout << "Type Your Valid Command To Do Action"<<endl << " help To show help-Menunn";

bool ConTact(false);

BeGiN:
do{

cin >> CMD;
Cmd CODE(CMD);
}while((cin>>CMD));


while(!(cin>>CMD)){
cout << "Unvalid Input :)nn";

goto BeGiN;
}

}


and my Command.h



#pragma once
#include <iostream>
#include <string>


using namespace std;

class Cmd{
public:
Cmd(string);
void Help();

private:
string _name;
};


and my Command.cpp:



#include <iostream>
#include <string>
#include "./Command.h"



Cmd::Cmd(string code ){
cout <<" hi n";

if(code =="help");//show help menu ;
else if(code=="add");//show add contact menu
else if(code=="rm"); // show remove contact menu
else if(code=="change"); //show change menu
else if(code=="ls"); //show list of types of contacts
else if(code=="ls-l"); //show list of favorit contact
else if(code=="ls-f"); //show list of family contact
else if(code=="ls-d"); //show list of friends contact
else if(code=="ls-fe"); //show list of female contact
else if(code=="ls-ma"); //show list of male contact
else if(code=="ls-best"); //show list of 10 best favorite contact
else if(code=="ls-last"); //show list of 10 lastest added contact
else if(code=="ls-d"); //show list of friends contact


}



when i typed g++ main.cpp in terminal a strange error occurred



/usr/bin/ld: /tmp/ccWpq3Ix.o: in function `main':
main.cpp:(.text+0xc6): undefined reference to
`Cmd::Cmd(std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >)'
collect2: error: ld returned 1 exit status


what should i do??
i used visual studio code.










share|improve this question







New contributor




mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











i use linux and g++ compiler for cplusplus and i made a class called Command.h with Command.cpp. my code is below



main.cpp



#include <iostream>
#include <string>
#include <ctime>

#include "./people.h"
#include "./Command.h"

using namespace std;
int main() {


string CMD="";
cout << "Type Your Valid Command To Do Action"<<endl << " help To show help-Menunn";

bool ConTact(false);

BeGiN:
do{

cin >> CMD;
Cmd CODE(CMD);
}while((cin>>CMD));


while(!(cin>>CMD)){
cout << "Unvalid Input :)nn";

goto BeGiN;
}

}


and my Command.h



#pragma once
#include <iostream>
#include <string>


using namespace std;

class Cmd{
public:
Cmd(string);
void Help();

private:
string _name;
};


and my Command.cpp:



#include <iostream>
#include <string>
#include "./Command.h"



Cmd::Cmd(string code ){
cout <<" hi n";

if(code =="help");//show help menu ;
else if(code=="add");//show add contact menu
else if(code=="rm"); // show remove contact menu
else if(code=="change"); //show change menu
else if(code=="ls"); //show list of types of contacts
else if(code=="ls-l"); //show list of favorit contact
else if(code=="ls-f"); //show list of family contact
else if(code=="ls-d"); //show list of friends contact
else if(code=="ls-fe"); //show list of female contact
else if(code=="ls-ma"); //show list of male contact
else if(code=="ls-best"); //show list of 10 best favorite contact
else if(code=="ls-last"); //show list of 10 lastest added contact
else if(code=="ls-d"); //show list of friends contact


}



when i typed g++ main.cpp in terminal a strange error occurred



/usr/bin/ld: /tmp/ccWpq3Ix.o: in function `main':
main.cpp:(.text+0xc6): undefined reference to
`Cmd::Cmd(std::__cxx11::basic_string<char, std::char_traits<char>,
std::allocator<char> >)'
collect2: error: ld returned 1 exit status


what should i do??
i used visual studio code.







constructor






share|improve this question







New contributor




mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question







New contributor




mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question






New contributor




mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked 43 mins ago









mohammadreza khorasani

1




1




New contributor




mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






mohammadreza khorasani is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 1




    Welcome to Code Review. I'm afraid this question does not match what this site is about. Code Review is about improving existing, working code. Code Review is not the site to ask for help in fixing or changing what your code does. Once the code does what you want, we would love to help you do the same thing in a cleaner way! Please see our help center for more information.
    – Heslacher
    39 mins ago










  • CodeReview reviews working code, so this question is off-topic here. Try asking on stackoverflow.com instead.
    – user673679
    38 mins ago










  • @user673679 SO won't accept this question either.
    – Mast
    21 mins ago














  • 1




    Welcome to Code Review. I'm afraid this question does not match what this site is about. Code Review is about improving existing, working code. Code Review is not the site to ask for help in fixing or changing what your code does. Once the code does what you want, we would love to help you do the same thing in a cleaner way! Please see our help center for more information.
    – Heslacher
    39 mins ago










  • CodeReview reviews working code, so this question is off-topic here. Try asking on stackoverflow.com instead.
    – user673679
    38 mins ago










  • @user673679 SO won't accept this question either.
    – Mast
    21 mins ago








1




1




Welcome to Code Review. I'm afraid this question does not match what this site is about. Code Review is about improving existing, working code. Code Review is not the site to ask for help in fixing or changing what your code does. Once the code does what you want, we would love to help you do the same thing in a cleaner way! Please see our help center for more information.
– Heslacher
39 mins ago




Welcome to Code Review. I'm afraid this question does not match what this site is about. Code Review is about improving existing, working code. Code Review is not the site to ask for help in fixing or changing what your code does. Once the code does what you want, we would love to help you do the same thing in a cleaner way! Please see our help center for more information.
– Heslacher
39 mins ago












CodeReview reviews working code, so this question is off-topic here. Try asking on stackoverflow.com instead.
– user673679
38 mins ago




CodeReview reviews working code, so this question is off-topic here. Try asking on stackoverflow.com instead.
– user673679
38 mins ago












@user673679 SO won't accept this question either.
– Mast
21 mins ago




@user673679 SO won't accept this question either.
– Mast
21 mins ago















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