Any way to call default variable values without specifying them?

[Swiftslide]

I'm doing integrity checks on variables before initialising them; if they fail the checks I want them to be set to the default value. So that I don't have to edit two different sections of code (e.g. in the .h and .cpp files of a class) if I want to change the value later, is there any "set as default" function that I can call within the body of a set method?

Not exactly an urgent issue, of course, but it'd be good to know.

[Athar]

if I want to change the value later, is there any "set as default" function that I can call within the body of a set method?

That depends on whether you created such a function.

class.h:

void set_percentage(int newPercentage)
{
  if (newPercentage<0 || newPercentage>100)percentage=get_default_percentage();
  else percentage=newPercentage;
}

static int get_default_percentage();

class.cpp:

int myClass::get_default_percentage()
{
  return 0;
}

It doesn't necessarily have to be a function, nor does it need to be static.

[Swiftslide]

I was talking about the default value that can be written in the method signature.

Based on your example, in a .h file for a class I might have a method header:

void set_percentage(int newPercentage = 50);

Where 50% is the default. In your above method, therefore, is there a way to change the "else" action so that I can retrieve that value (short of recursively calling the method with no value specified, i.e. set_percentage(); )?

Basically I want to know whether that number 50 can be accessed, so that I can simply change its value the .h file without having to touch the actual implementation.

[firedraco]

No, you can't unfortunately...although you could just call the function with no arguments if you get a bad value:

int my_set_percentage(int new_value) {
    if(new_value > 0 && new_value < 100) set_percentage(new_value);
    else set_percentage();
}

[Swiftslide]

Fair enough, just thought I'd asked. Thanks for your help.