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OrbWorks Community Forum • View topic - how to catch error ???????????

how to catch error ???????????

Discuss OrbForms Designer and PocketC Architect

Postby nekin on Tue Apr 18, 2006 10:36 am

hi
i m developing palm os application in pocketc Architect version 4.0

and i want to use facility like try catch to catch errors thrown by system calls.

so please help me how can i use it.. because i did not found any such information with in the editor help

plz help me as soon as possible

:- Nekin
nekin
nekin
 
Posts: 1
Joined: Mon Apr 17, 2006 11:11 am
Location: India

Postby mlambrigger on Tue Apr 18, 2006 10:59 am

Very simple: you can not.

You must develop algorythms with error control in or developp your own error system.
Exemple:
Code: Select all
int testSys(int val1, int val2){
// return 1 if values are equal
//  0 if not
// definition: the values must be positiv
// return -1 if val1 is not positiv
//  -2 if val2 is not positiv
//  -3 if both are negativ
  int result = 0;
 
  if(val1<0) result = -1;
  if(val2<0){
    if(result == -1) result = -3;
    else result = -2;
  }
  if(result>=0) result = !(val1 == val2);
  return result;
}


with that you have all the possible values used.

With databases, you can control each step you make:
Database db;
if(db.open(..,...)){
if(db.getrec(...,...)){
etc...
rec.close;
}
db.close;
}
else{
if(db.create(...,...,...,...)){
db.close();
result = this.self_call();
}
}
return result;

When you do that, you can be sure you control your program. Your program will be failure protected.

Marc Lambrigger
Marc Lambrigger
mlambrigger
 
Posts: 113
Joined: Fri Feb 13, 2004 11:07 am
Location: Switzerland


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