I have an undefined reference for C++ program and have no idea on how to treat it

Question

Ive been getting an undefined reference error even though ive checked and found no discrepancies with header file inclusion, wrong function name in either the header file or .cpp file. Ive also checked weather its my function call thats wrong but it seems all correct. I've never had to deal with this kind of problem before and i'm completely stumped. I imagine this might be a ton of code, so if you have any tips for me to treat it myself is already good enough as long as you take my previous tries in consideration.

g++ main.cpp republica.cpp morador.cpp tarefa.cpp conta.cpp -o SRO.o
/usr/bin/ld: /tmp/cc1XrC11.o: in function `gerenciarMoradores(tarefa**, morador**)':
main.cpp:(.text+0x1579): undefined reference to `pessoa::getNome[abi:cxx11](morador*)'
/usr/bin/ld: main.cpp:(.text+0x1694): undefined reference to `pessoa::setNome(morador*, 
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/usr/bin/ld: main.cpp:(.text+0x16cd): undefined reference to `pessoa::setIdade(morador*, 
int)'
/usr/bin/ld: main.cpp:(.text+0x16fa): undefined reference to 
`pessoa::setHierarquia(morador*, int)'
/usr/bin/ld: main.cpp:(.text+0x1739): undefined reference to 
`pessoa::setAniversario(morador*, std::__cxx11::basic_string<char, std::char_traits<char>, 
std::allocator<char> >)'
/usr/bin/ld: main.cpp:(.text+0x1a4f): undefined reference to `pessoa::getNome[abi:cxx11] 
(morador*)'
/usr/bin/ld: /tmp/cc1XrC11.o: in function `gerenciarRepublica(int, morador**, tarefa**, 
republica*)':
main.cpp:(.text+0x20e6): undefined reference to `rep::setNome(republica*, 
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/usr/bin/ld: main.cpp:(.text+0x2109): undefined reference to 
`rep::setQtd_morador(republica*, int)'
/usr/bin/ld: main.cpp:(.text+0x2122): undefined reference to `rep::setSaldo(republica*, 
float)'
/usr/bin/ld: main.cpp:(.text+0x2139): undefined reference to 
`rep::setQtd_morador(republica*, int)'
/usr/bin/ld: /tmp/cc1XrC11.o: in function `controledeTarefas(int, tarefa**)':
main.cpp:(.text+0x26e9): undefined reference to `task::getNome[abi:cxx11](tarefa*)'
/usr/bin/ld: main.cpp:(.text+0x27d6): undefined reference to `task::setNome(tarefa*,  
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/usr/bin/ld: main.cpp:(.text+0x2809): undefined reference to `task::setHorario(tarefa*, 
int)'
/usr/bin/ld: /tmp/cc1NzJ6p.o: in function `imprimeRep(republica*)':
republica.cpp:(.text+0x170): undefined reference to `rep::getNome[abi:cxx11](republica*)'
/usr/bin/ld: republica.cpp:(.text+0x1d4): undefined reference to 
`rep::getQtd_morador(republica*)'
/usr/bin/ld: republica.cpp:(.text+0x238): undefined reference to `rep::getSaldo(republica*)'
/usr/bin/ld: /tmp/ccRWurEO.o: in function `imprimeMoradores(morador**)':
morador.cpp:(.text+0xd8): undefined reference to `pessoa::getNome[abi:cxx11](morador*)'
/usr/bin/ld: morador.cpp:(.text+0x11c): undefined reference to `pessoa::getIdade(morador*)'
/usr/bin/ld: /tmp/ccVsueeD.o: in function `salvaLista(lista*)':
conta.cpp:(.text+0x673): undefined reference to `conta::getOp(movimentacao*)'
/usr/bin/ld: /tmp/ccVsueeD.o: in function `editaMovm(int, lista*)':
conta.cpp:(.text+0x1394): undefined reference to `conta::setCod(movimentacao*, int)'
/usr/bin/ld: conta.cpp:(.text+0x13bd): undefined reference to `conta::setNome(movimentacao*, 
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/usr/bin/ld: conta.cpp:(.text+0x13e2): undefined reference to 
`conta::setValor(movimentacao*, float)'
/usr/bin/ld: conta.cpp:(.text+0x13fd): undefined reference to `conta::setOp(movimentacao*, 
bool)'
collect2: error: ld returned 1 exit status
make: *** [Makefile:2: all] Error 1

The header file is

#include <iostream>
#include <string>
#include "tarefa.hpp"
using namespace std;

typedef struct morador Morador;

Morador* alocaMorador(string nome, int idade, int hierarquia, Tarefa** tarefa, string 
anniversario);
void imprimeMoradores(Morador** a);
void deletaMorador(Morador* a);

namespace pessoa{

string getNome(Morador* a);
void setNome(Morador* a, string b);
int getIdade(Morador* a);
void setIdade(Morador* a, int b);
int getHierarquia(Morador* a);
void setHierarquia(Morador* a, int hierarquia);
string getAniversario(Morador*a);
void setAniversario(Morador* a, string aniversario);

}

main.cpp is

#include <iostream>
#include <unistd.h>
#include <string>
#include "conta.hpp"
#include "tarefa.hpp"
#include "morador.hpp"
#include "republica.hpp"
using namespace std;

void menu(int a, int b); 
void gerenciarMoradores(Tarefa** tarefas, Morador** aux); 
void gerenciarRepublica(int flag, Morador** moradores, Tarefa** tarefas, Rep* aux); 
void controledeTarefas(int flag,  Tarefa** aux); 
void controleFinanceiro(int flag, Lista* aux); 

int main(int argc, char const *argv[]) {
Rep* rep;
Morador** moradores = new Morador*[12];
Tarefa** tarefas;
Lista* financeiro;
int flag;
cout << "\e[8;18;74t";
cout << "\033[2J\033[1;1H";
cout<<"Deseja abrir uma republica nova(1) ou deseja abrir uma republica salva(2)? (0 para 
sair): ";cin>>flag;
while(flag<0||flag>2){
  cout << "\e[8;18;74t";
  cout << "\033[2J\033[1;1H";
  cout<<"INVALIDO, por favor selecione  1-abrir uma republica nova||2-abrir uma republica 
salva||0-Sair : ";
  cin>>flag;
}
if(flag==0){
  cout << "\e[8;18;74t";
  cout << "\033[2J\033[1;1H";
  cout << "\t\t\tSAINDO!!!\n\n\n";
  sleep(1);
  cout << "\e[8;18;74t";
  cout << "\033[2J\033[1;1H";
  return 0;
}
else{
  gerenciarRepublica(flag, moradores, tarefas, rep);
  controleFinanceiro(flag, financeiro);
}
int op;
menu(0,0);
cin>>op;
while(op!=0){

  switch (op){
    case 1:
      gerenciarRepublica(0, moradores, tarefas,rep);
      menu(0,0);
      break;
    case 2:
      gerenciarMoradores(tarefas, moradores);
      menu(0,0);
      break;
    case 3:
      controledeTarefas(0, tarefas);
      menu(0,0);
      break;
    case 4:
      controleFinanceiro(0, financeiro);
      menu(0,0);
      break;
    default:
      menu(1, 0);
    break;
  }
  cin>>op;
}
cout << "\e[8;18;74t";
cout << "\033[2J\033[1;1H";
cout << "\t\t\tSAINDO!!!\n\n\n";
sleep(1);
cout << "\e[8;18;74t";
cout << "\033[2J\033[1;1H";
return 0;
}

morador.cpp (where the functions are implemented):

#include "morador.hpp"

struct morador{
string nome;
int idade;
int hierarquia;
Tarefa** tarefa;
string aniversario;
};

Morador* alocaMorador(string nome, int idade, int hierarquia, Tarefa** 
tarefa, string anniversario){
Morador* aux = new Morador;
aux->nome = nome;
aux->idade = idade;
aux->hierarquia = hierarquia;
aux->tarefa = tarefa;
aux->aniversario = anniversario;
return aux;
}
void imprimeMoradores(Morador** a){
for(int i=0; i<12; i++){
  cout<<pessoa::getNome(a[i])<<" Idade: "<<pessoa::getIdade(a[i]);
  if(a[i]->hierarquia == 12)
    cout<<" Bixo ";
  else if(a[i]->hierarquia == 11)
    cout<<" Semi-Bixo ";
  else if(a[i]->hierarquia <= 10&&a[i]->hierarquia>1)
    cout<<" Morador -"<<i;
  else
    cout<<" Decano";
  cout<<" | Nascimento "<<a[i]->aniversario<<endl;
}
}
void deletaMorador(Morador* a){
delete[] a;
}

string getNome(Morador* a){
return a->nome;
}
void setNome(Morador* a, string b){
a->nome = b;
}
int getIdade(Morador* a){
return a->idade;
}
void setIdade(Morador* a, int b){
a->idade = b;
}
int getHierarquia(Morador* a){
return a->hierarquia;
}
void setHierarquia(Morador* a, int hierarquia){
a->hierarquia = hierarquia;
}
string getAniversario(Morador*a){
return a->aniversario;
}
void setAniversario(Morador* a, string b){
a->aniversario = b;
}

Where do you define all of those functions you have declared? — NathanOliver, Oct 03 '19 at 21:13
Where and how these functions (e.g. `pessoa::getNome`) are implemented? A [mcve] would help. — HolyBlackCat, Oct 03 '19 at 21:13
[What is undefined reference error and how to fix it?](https://stackoverflow.com/questions/12573816/what-is-an-undefined-reference-unresolved-external-symbol-error-and-how-do-i-fix) — R Sahu, Oct 03 '19 at 21:14
@HolyBlackCat they are inside morador.cpp, would you like me to add them to the question? — lucas sa, Oct 03 '19 at 21:15

score 1 · Accepted Answer · answered Oct 03 '19 at 21:26

1

You need to enclose your code in the .cpp file inside the same namespace declaration as in the header:

// your includes


namespace pessoa{
    // your cpp code here ...
}

answered Oct 03 '19 at 21:26

Amir Kirsh

12,564
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I have an undefined reference for C++ program and have no idea on how to treat it

1 Answers1