Aros/Developer/Docs/Examples/HelloWorld

Description

This is an example 'Hello World' program to demonstrate the basics of using c under AROS

The Code

#include <stdio.h>
 
int main(void)
{
    puts("Hello, world!");
    return 0;
}

Save this as a plain text file named 'helloworld.c'. Inside AROS you can do this by opening a shell (e.g. hit RightAROSKey* + w in Wanderer), typing 'edit helloworld.c', entering the code above, hit RightAROSKey + w to save it, hit RightAROSKey + q to quit editing.

(*on most keyboards RightAROSKey is the Windows key on the right side)

Making It Compile

If you've created 'helloworld.c' inside AROS, compile it with:

 gcc -o helloworld helloworld.c

To cross-compile it from linux, provided you've got a proper SDK installed, making the executable helloworld program on AROS-linux-hosted takes this step:

i386-aros-gcc -o helloworld helloworld.c

In both cases, the result will be an executeable called 'helloworld', which should run under AROS.

Running It

In case you've cross-compiled from linux, move the executable into the AROS-linux-hosted installation tree, e.g. like this (assuming 'AROS/' is the root directory of AROS-linux-hosted, which corresponds to the 'System' partition inside AROS):

> mv helloworld AROS/

Inside AROS, find and run your executable via Wanderer, in our case: double-click 'System' icon on Wanderer desktop, double-click 'helloworld' icon (you might have to hold right mouse button and select 'Window -> View -> All Files' to see it). A window will be opened displaying the program's output.

Or, to run it from AROS' shell, assuming you are still in the same directory where you compiled it, just type its name:

System:> helloworld