GCC problems

natm · 10-12-2004, 11:53 AM

I am a C++ programmer and I am used to a windows IDE.
I have made the switch to linux but I want to know how to use GCC. I make the simplest of code that would work with codewarrior but when I compile it, I get all sorts of weird errors that I don't understand.

I am using the normal stuff:

#include<iostream.h>
void main()
{
cout<<"hello"<<endl;
}

normal things like this will not compile.

jacksmash · 10-12-2004, 12:10 PM

I'm having the same problem and would appreciate any pointers! (no pun intended)

Komakino · 10-12-2004, 12:40 PM

"all sorts of weird error messages" doesn't help us one bit. If you want any help solving problems you're gonna have to at least TELL us the problem. Post the error message.

[EDIT]
I'm pretty certain main() returns int, not void these days.

natm · 10-12-2004, 01:17 PM

first of all, I might be using the wrong command so it could yougive me the right command for compiling c++ programs?

I just type

gcc <filename>

but now that I think about it, I don't know how to specify where the compiled executable should go.

Komakino · 10-12-2004, 01:28 PM

Quote:

Originally posted by natm
first of all, I might be using the wrong command so it could yougive me the right command for compiling c++ programs?

I just type

gcc <filename>

but now that I think about it, I don't know how to specify where the compiled executable should go.

You need to familiarise yourself with manual pages. Type:
man gcc
and you'll get the whole manual page for GCC (the gnu compiler collection). Most linux programs have a manual page and you access them in exactly the same way. It's q to quit, btw.

Right o, the command for compiling c++ is g++ not gcc. gcc will compile plain old vanilla C, not C++. So you want:
g++ <filename> -o executablename
If you don't specify the executable name you'll get an executable called a.out

natm · 10-12-2004, 05:31 PM

the file shows up after being compiled but I don't know how to execute it.
I have read, write, and execute permissions for it.

Mara · 10-15-2004, 02:56 PM

Run
./executablename

DaHammer · 10-15-2004, 11:48 PM

Quote:

Originally posted by natm
I am a C++ programmer and I am used to a windows IDE.
I have made the switch to linux but I want to know how to use GCC. I make the simplest of code that would work with codewarrior but when I compile it, I get all sorts of weird errors that I don't understand.

I am using the normal stuff:

#include<iostream.h>
void main()
{
cout<<"hello"<<endl;
}

normal things like this will not compile.

Try:

Code:

#include <iostream>
using namespace std;
int main ()
{
  cout << "hello" << endl;
}

or

Code:

#include <iostream>
int main ()
{
  std::cout << "hello" << std::endl;
}

Code:

g++ hello.cpp -o hello

natm · 10-17-2004, 09:42 PM

Thanks, I got it to compile and run but I have one more question:

which header file do I use for getch() in linux?