a question about <iostream.h>

tqviet · 07-26-2009, 04:02 AM

hi everbody,

I got a trouble when I compiled a file, coded in C++ language.

//The file was named by thu1.cpp is below:

#include<stdlib.h>
#include<iostream.h>

int main()
{
cout<< "hi everybody" << endl;
return 1;
}

In the terminal, I typed:

g++ -o thu1 thu1.cpp

and I got:

thu1.cpp:2:21: error: iostream.h: No such file or directory
thu1.cpp: In function ‘int main()’:
thu1.cpp:7: error: ‘cout’ was not declared in this scope
thu1.cpp:7: error: ‘endl’ was not declared in this scope

is there anyone help me ? Thank you.

PS: I use Debian-Linux.

EricTRA · 07-26-2009, 04:05 AM

Hi,

You're missing a package, that's obvious, most likely a development library. What distro are you using?

Kind regards,

Eric

Nylex · 07-26-2009, 04:08 AM

Per the C++ standard, you should be using "iostream", rather than "iostream.h". Also, for C headers (e.g. stdlib.h), you should drop the ".h" and prefix a "c" (so "stdlib.h" should become "cstdlib"). The problem of cout and endl not being declared in scope is due to the fact that they're defined in the std namespace. You need to either make the entire namespace available (by adding the statement "using namespace std;" below your include directives), include the specific objects you want to use (by including the statements "using std::cout;" and "using std::endl;" below your include directives) or fully qualify the cout and endl objects when you use them (e.g. "cout" should become "std::cout").

Edit: you don't actually make use of anything from stdlib.h/cstdlib, so why do you need to include it?

Edit: also, as this is a programming question, I've reported your thread to be moved to the programming forum.

chigurh8 · 07-26-2009, 04:11 AM

Code:

#include <cstdlib>
#include <iostream>
using namespace std;

int main()
{
    cout << "hello" << endl;
    return 0;
}

chigurh8 · 07-26-2009, 04:12 AM

They're not missing anything, if written the same way it's written in their code, the exact same message will show up on mine. I'm not missing anything.

pixellany · 07-26-2009, 07:38 AM

Moved: This thread is more suitable in <Programming> and has been moved accordingly to help your thread/question get the exposure it deserves.