I am having some problems when I try to compile my C ++ project example, I try to read the sequencing file, but when I compile I got some errors, here is the code:
// ReadClientFile.cpp // Lendo e imprimindo um arquivo sequêncial. #include <iostream> using std::cerr; using std::cout; using std::endl; using std::fixed; using std::ios; using std::left; using std::right; using std::showpoint; #include <fstream> // Fluxo de arquivo using std::ifstream; // Insere fluxo de arquivo #include <iomanip> using std::setw; using std::setprecision; #include <string> using std::string; #include <cstdlib> using std::exit; // Sai do protótipo de funcão void outputLine( int, const string, double ); // Protótipo int main() { // Construtor ifstream, abre o arquivo ifstream inClientFile( "Clients.dat", ios::in ); // Fecha o programa se ifstream não pode abrir o arquivo if ( !inClientFile ) { cerr << "File could not be opened" << endl; exit ( 1 ); } // Fim do if int account; char name[ 30 ]; double balance; cout << left << setw( 10 ) << "Account" << setw( 13 ) << "Name" << "Balance" << endl << fixed << showpoint; // Exibe cada registro do arquivo while ( inClientFile >> account >> name >> balance ) outputLine( account, name, balance ); return 0; // Destrutor ifstream fecha o arquivo } // Fim de main // Exibe um registro do arquivo void outputLine( int account, const string name, double balance ) { cout << left << setw( 10 ) << account << setw( 13 ) << name << setw( 7 ) << setprecision( 2 ) << right << balance << endl; } // Fim da funcão outputLine
And here is the compilation log:
ubuntu@ubuntu-laptop :~/C++$ gcc ReadClientFile.cpp /tmp/ccVkuUp1.o: In function `__static_initialization_and_destruction_0(int, int)': ReadClientFile.cpp:(.text+0x1d): undefined reference to `std::ios_base::Init::Init()' ReadClientFile.cpp:(.text+0x22): undefined reference to `std::ios_base::Init::~Init()' /tmp/ccVkuUp1.o: In function `outputLine(int, std::basic_string<char, std::char_traits<char>, std::allocator<char> >, double)': ReadClientFile.cpp:(.text+0xd1): undefined reference to `std::cout' ReadClientFile.cpp:(.text+0xd6): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::ios_base& (*)(std::ios_base&))' ReadClientFile.cpp:(.text+0xe7): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)' ReadClientFile.cpp:(.text+0xf8): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(int)' ReadClientFile.cpp:(.text+0x109): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)' ReadClientFile.cpp:(.text+0x11a): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char>, std::allocator<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)' ReadClientFile.cpp:(.text+0x12b): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)' ReadClientFile.cpp:(.text+0x13c): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setprecision)' ReadClientFile.cpp:(.text+0x14c): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::ios_base& (*)(std::ios_base&))' ReadClientFile.cpp:(.text+0x15b): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(double)' ReadClientFile.cpp:(.text+0x163): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' ReadClientFile.cpp:(.text+0x16b): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))' /tmp/ccVkuUp1.o: In function `main': ReadClientFile.cpp:(.text+0x1ac): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream(char const*, std::_Ios_Openmode)' ReadClientFile.cpp:(.text+0x1bf): undefined reference to `std::basic_ios<char, std::char_traits<char> >::operator!() const' ReadClientFile.cpp:(.text+0x1d2): undefined reference to `std::cerr' ReadClientFile.cpp:(.text+0x1d7): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' ReadClientFile.cpp:(.text+0x1df): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' ReadClientFile.cpp:(.text+0x1e7): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))' ReadClientFile.cpp:(.text+0x234): undefined reference to `std::cout' ReadClientFile.cpp:(.text+0x239): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::ios_base& (*)(std::ios_base&))' ReadClientFile.cpp:(.text+0x24d): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)' ReadClientFile.cpp:(.text+0x25d): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' ReadClientFile.cpp:(.text+0x271): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)' ReadClientFile.cpp:(.text+0x281): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' ReadClientFile.cpp:(.text+0x291): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)' ReadClientFile.cpp:(.text+0x299): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)' ReadClientFile.cpp:(.text+0x2a1): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))' ReadClientFile.cpp:(.text+0x2b1): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::ios_base& (*)(std::ios_base&))' ReadClientFile.cpp:(.text+0x2c1): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::ios_base& (*)(std::ios_base&))' ReadClientFile.cpp:(.text+0x2e0): undefined reference to `std::allocator<char>::allocator()' ReadClientFile.cpp:(.text+0x2ff): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&)' ReadClientFile.cpp:(.text+0x32f): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()' ReadClientFile.cpp:(.text+0x357): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()' ReadClientFile.cpp:(.text+0x373): undefined reference to `std::allocator<char>::~allocator()' ReadClientFile.cpp:(.text+0x39b): undefined reference to `std::allocator<char>::~allocator()' ReadClientFile.cpp:(.text+0x3c4): undefined reference to `std::basic_istream<char, std::char_traits<char> >::operator>>(int&)' ReadClientFile.cpp:(.text+0x3d5): undefined reference to `std::basic_istream<char, std::char_traits<char> >& std::operator>><char, std::char_traits<char> >(std::basic_istream<char, std::char_traits<char> >&, char*)' ReadClientFile.cpp:(.text+0x3e9): undefined reference to `std::basic_istream<char, std::char_traits<char> >::operator>>(double&)' ReadClientFile.cpp:(.text+0x3fd): undefined reference to `std::basic_ios<char, std::char_traits<char> >::operator void*() const' ReadClientFile.cpp:(.text+0x41d): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::~basic_ifstream()' ReadClientFile.cpp:(.text+0x453): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::~basic_ifstream()' /tmp/ccVkuUp1.o:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0' collect2: ld returned 1 exit status