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How To Return to Main()

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Join Date: Nov 2008

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arshad115

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How To Return to Main()

Mar 10th, 2009

i have so many functions in my program,what i want to do is, i want to return back to the main() but in somewhere middle of it!.

should i use goto statements?
i tried 'em,it gave some error!

if i should use goto then please explain how to,thanks

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Join Date: Aug 2005

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iamthwee

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Re: How To Return to Main()

Mar 10th, 2009

I'm guessing you're a newbie.

There are a few justifications that warrant the use of gotos. I'm willing to bet this ain't one of them.

Post your code?

*Voted best profile in the world*

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Join Date: Jul 2008

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ArkM

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Re: How To Return to Main()

Mar 10th, 2009

It's freeware in the public domain. Try this, it works:

 Help with Code Tags 
 c++ Syntax (Toggle Plain Text) 
struct Cry {
  const char* what() const {
    return "Mummy, I\'m afraid!";
  }
};
void Lots() { 2*2==4; throw Cry(); }
void of () { Lots(); }
void functions  () { of(); } 
int main() 
{
  try {
    functions();
  }
  catch(Cry mail) {
    cout << mail.what() << "..\n";
    cout << "I\'m very glad to see you!" << endl;
  }
  catch(...) {
    cout << "Bye forever ;(" << endl;
  }
  return 0;
}
struct Cry {
  const char* what() const {
    return "Mummy, I\'m afraid!";
  }
};
void Lots() { 2*2==4; throw Cry(); }
void of () { Lots(); }
void functions  () { of(); } 
int main() 
{
  try {
    functions();
  }
  catch(Cry mail) {
    cout << mail.what() << "..\n";
    cout << "I\'m very glad to see you!" << endl;
  }
  catch(...) {
    cout << "Bye forever ;(" << endl;
  }
  return 0;
}

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Join Date: Aug 2005

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iamthwee

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Re: How To Return to Main()

Mar 10th, 2009

The above is proof that people who use c++ are geeks and have no life

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Join Date: Nov 2008

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arshad115

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Re: How To Return to Main()

Mar 10th, 2009

ya i am a newbie!
i want to return to the lines above ,where i call the function,i cant design my program.
i want to return to a menu which is in the main and if the user wants to run the function again then he can select it again from the main

•

Originally Posted by ArkM

It's freeware in the public domain. Try this, it works:
Help with Code Tags

c++ Syntax (Toggle Plain Text)
struct Cry {
  const char* what() const {
    return "Mummy, I\'m afraid!";
  }
};
void Lots() { 2*2==4; throw Cry(); }
void of () { Lots(); }
void functions  () { of(); } 
int main() 
{
  try {
    functions();
  }
  catch(Cry mail) {
    cout << mail.what() << "..\n";
    cout << "I\'m very glad to see you!" << endl;
  }
  catch(...) {
    cout << "Bye forever ;(" << endl;
  }
  return 0;
}
struct Cry { const char* what() const { return "Mummy, I\'m afraid!"; } }; void Lots() { 2*2==4; throw Cry(); } void of () { Lots(); } void functions () { of(); } int main() { try { functions(); } catch(Cry mail) { cout << mail.what() << "..\n"; cout << "I\'m very glad to see you!" << endl; } catch(...) { cout << "Bye forever ;(" << endl; } return 0; }

thanks for posting,but can u plz explain a bit?

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Join Date: Jul 2008

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ArkM

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Re: How To Return to Main()

Mar 10th, 2009

•

Originally Posted by arshad115

...but can u plz explain a bit?

Better look at http://www.cprogramming.com/tutorial/exceptions.html or search Google for C++ exception handling.
It's possible to use exceptions for the program control (however as usually it's considered as a bad style).
I think no special problems to design your menu handling to provide fast return to the main loop without gotos and exceptions...

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monkey_king monkey_king is offline

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Junior Poster

Re: How To Return to Main()

Mar 11th, 2009

goto's can only jump to labels within the same function,
so I don't think you will be able to do it with goto's if you are in some far away function.

There are any beautifull way of doing what you want without having to redesign you program or use c++ exceptions.

On a general note goto should be avoided.
I've only found them usefill in some crazy switch statements.
Which basicly changes it to a jump table.

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Join Date: Nov 2008

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arshad115

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Junior Poster in Training

Re: How To Return to Main()

Mar 11th, 2009

i have functions that call "other functions",and i want to make a menu that return the user from the "other functions" to the main directly,but i also have a while loop in main,and some code above it,i want to goto the while loop from the "other functions"!

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Join Date: Jul 2008

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cikara21

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Re: How To Return to Main()

Mar 11th, 2009

Reset your var..Cleanup..Then call menu..It's hard to read your codes..esspecialy if it invinsible..

$.:-cikara21-:.$

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Join Date: Feb 2009

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tux4life

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Re: How To Return to Main()

#10

Mar 11th, 2009

Maybe you should just try to call 'return <something>' in your code ...
After the return instruction no code is executed anymore so the function will go back to 'main()' (if the function is called from the 'main()' function)

P.S. : Can you please post us some code so we can take a look at what exactly you do mean?

Last edited by tux4life; Mar 11th, 2009 at 2:57 pm.