functions

[9605fSEw]

While observing an existing code, i see a following statements sometime...can anyone help me to understand what do they mean..?

1-
func1(cl1 a, cl2 b)
{
----
----
datatype obj::readById();

}

...now i wonder why the function readByID was not called using dot operator as it is usually done...this sure calls the function but how it is different from a usual call..?



2-

within the definition a class, i see the following:

void setConCode(const std::string& value);

std::string getConCode() const;

While the fist looks like a usual declaration of a function but i do not understand the syntax of the secod one....can anyone explain..?

Thanks in anticipation...

[helios]

1. readById() is a static method of obj, so it doesn't need need an instance to be called.
2. According to a certain book:

If you declare a class method const, you are promising that the method won't change the value of any of the members of the class.
void SomeFunction() const;

It seems to me like an utter waste of time to declare anything like that. This is why I skipped const.

[9605fSEw]

Thanks fr ur reply... :-)

[Zhuge]

It seems to me like an utter waste of time to declare anything like that. This is why I skipped const.

Well, it is important if you are going to have any const instances of your class, since as far as I know the compiler will not let you call any non-const methods of a const class.