Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Return to start function?

Posted on 2001-06-21
4
175 Views
Last Modified: 2013-11-20
Hi experts,

I call function A(), A() calls B(),...., calls Z().
If something wrong in function Z(), program will be stoped by exit(0) in the function Z().
Now, I want it goes back to function A(), instead of stoped, if anything wrong in function Z().
I know we can do that by 'return' from z() to Y()....to A() but need hard work!

Any good suggestions?
0
Comment
Question by:learn
  • 2
4 Comments
 
LVL 12

Accepted Solution

by:
migel earned 60 total points
ID: 6214017
Hi!
use exception mechanism
that is:
A()
{
try
{
B();
}
catch(int)
{
// something wrong in the call chain
}
}

B()
{
Z();
}

Z()
{
if (error condition)
 throw 5; // generate exception;
}
0
 
LVL 3

Expert Comment

by:cypherljk
ID: 6214019
learn,
  I don't know what you mean by 'something goes wrong' but take a look at using 'try' and 'catch' blocks.  If an error or exception is caught it will be passed back up the calling stack.  the calling stack is a list of the functions that are currently executing. For example if A(), A() calls B(),...., calls Z() and exception 1 happens in z() if your catch block in in z catchs errors/exceptions of type 1 you could call a() from there OR you could have the catch in a(). You'll need to look up exceptions handling as there are many ways you can handle and pass exceptions and errors.

My 2 cents...
0
 

Author Comment

by:learn
ID: 6214640
Thanks a lot, that works great.

Thanks to all experts as well.....
0
 
LVL 3

Expert Comment

by:cypherljk
ID: 6216884
close the reference to this ? in the c++ section

my 2 cents...
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
MFC Dialog 9 51
Installing Microsoft R server on REDHAT or SUSE Linux 4 147
centeredAverage challenge 8 179
"Black Box" Testing of Control System Software 2 70
Introduction: The undo support, implementing a stack. Continuing from the eigth article about sudoku.   We need a mechanism to keep track of the digits entered so as to implement an undo mechanism.  This should be a ‘Last In First Out’ collec…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

837 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question