newbie c question

[Arthur Gold]

You want to type:
./hello

(assuming that '.', i.e. the current directory, is not in your PATH--as
it most likely
isn't...and shouldn't be)

When looking for executables, *n*x searches only those directories
contained in 
your PATH environment variable--do an 'echo $PATH' to see how your PATH
is defined.

For further info, look through your Running Linux book--it discusses the
issue
quite nicely, IIRC.

HTH,
--ag

Robert Luke wrote:
> 
> Hello, I'm looking at C for the first time and am trying to compile a simple
> example found in "Running Linux (2ed)" by Matt Welsh and Lar Kaufman.  I
> have Caldera OpenLinux 2.2 on my laptop.  If someone could tell me what
> bonehead mistake I'm making, I'd be grateful!  :-)
> 
> 1.  I've created a program called "hello.c" which contains the following
> lines:
> 
>     #include <stdio.h>
>     int main() {
>       (void)printf("Hello, world!\n");
>       return 0;
>     }
> 
> 2.  I compile and run it at the following two prompts:
> 
>     $ gcc -o hello hello.c
>     $ hello
> 
>     bash:  hello:  command not found
> 
>     (I.e., it seems to compile okay, but it doesn't execute.)
> 
> 3.  My first thought was that the executable file "hello" isn't actually
> executable; but the result of "ls -al" is
> 
>    -rwxr-xr-x   1   robert   users   34935   Aug 22   17:54   hello
> 
> Please help!  TIA,
> -Robert