return from the main

[Citis]

I want to see the result of a c programme (the value a of the "return a;" command of the "main" function). How can I do it in the terminal program of a Linux operating system.

int main(int argc,char *argv[])
{
	int a=10;
	return a;
}

[shadow123]

Hi, with
echo $?
you are able to print the last exit code returned to the shell.

[MrHutch]

If you want to automate it, just write a script of some sort:

Example called ShowReturn. You'd pass the program name into this script. It's written using the Korn shell, but can be easily adapted.

#!/usr/bin/ksh

if [ $# -eq 1 ]
then
   prog_name=$1
   if [ -f ./$prog_name ]
   then
      $prog_name
      print "$prog_name returned $?"
   else
      print "File $prog_name doesn't exist"
      exit
   fi
else
   print "Usage: ShowReturn <program_name>" 
   exit
fi

You'd run your program through it like so (let's assume your program is called a.out): ShowReturn a.out

The output printed would be:

a.out returned 10

[Citis]

Thank you

[S G H]

Is there a way to get some other program's Return Value?
Like, I have a program that always returns 16, and a Launcher, how can I get the first program's Return Value from the Launcher?