How to compile a c++ program in Linux?

Question

I made a file hi.cpp and I wrote the command given below:

#include <iostream> using namespace std; int main () {   cout << "Hello World! ";   cout << "I'm a C++ program";   return 0; } 

then I ran it in my RHEL 6 machine with the following command

gcc hi.cpp 

and I got some errors which are as follows:

[chankey@localhost ~]$ gcc hi.cpp /tmp/cc32bnmR.o: In function `main': hi.cpp:(.text+0xa): undefined reference to `std::cout' hi.cpp:(.text+0xf): 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> >&, const char*)' hi.cpp:(.text+0x19): undefined reference to `std::cout' hi.cpp:(.text+0x1e): 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> >&, const char*)' /tmp/cc32bnmR.o: In function `__static_initialization_and_destruction_0(int, int)': hi.cpp:(.text+0x4c): undefined reference to `std::ios_base::Init::Init()' hi.cpp:(.text+0x51): undefined reference to `std::ios_base::Init::~Init()' /tmp/cc32bnmR.o:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0' collect2: ld returned 1 exit status [chankey@localhost ~]$  

What do these errors denote? My code is correct then why am I getting errors?

Answer 1

Use g++

g++ -o hi hi.cpp 

g++ is for C++, gcc is for C although with the -libstdc++ you can compile c++ most people don't do this.