Comments on: C++ Unary and binary operator overloading and static members

By: admin

admin — Thu, 24 Jun 2010 17:23:09 +0000

@Tim
Yes, I see what you mean now. (I always did a postfix instead of a prefix and postfix). I’ve corrected the example and also changed the other examples to things you send by email.

Thank you for helping to improve this tutorial.

By: Tim

Tim — Wed, 23 Jun 2010 19:59:43 +0000

Well, I must say, while I can see you improved the tutorial, my point is still not addressed. Try using normal ints instead of Inc instances, you’ll see what I mean:
int a = 0;
int b = a++;
cout << a << endl; // This prints 1, ok.
cout << b << endl; // This prints 0, not 1!

This tutorial program prints this:
Result prefix (on a) and postfix (on b)
c = 2
d = 6
While it should really print this:
Result prefix (on a) and postfix (on b)
c = 2
d = 5

This is because Inc operator++(int) is not implemented correctly.

By: admin

admin — Tue, 22 Jun 2010 21:22:28 +0000

Tim, you are right! So we have re-written the tutorial.
The new tutorial (see above) should be much easier to understand than the old one.
It also has more (larger and complete) examples and we’ve added a download link to the source.
Also added a link to an unary and binary operator table .

So we hope you and the other visitors will like it!

By: Tim

Tim — Tue, 22 Jun 2010 09:45:01 +0000

EDIT: see comment of the admin below! The code in mentioned in this comment is not used in the re-written C++ tutorial.

Original comment:
In this tutorial, pre- and post-increment are implemented identical. This is not correct. They are not the same thing. The difference is that post-increment will return the OLD value. They should be more like this:

Rational& operator++()
{
num += den;
return *this;
}

Rational operator++(int)
{
Rational old_value(*this);
++(*this); // Or you could just write: num += den;
return old_value;
}

kthxbye

By: Hala Khanji

Hala Khanji — Sat, 01 May 2010 14:09:04 +0000

Thaaaaaaaaaaaaaaaaaaaaaaank you very much! You really helped me out . You see my doctors suck at teaching!

By: abhishek

abhishek — Sat, 05 Dec 2009 07:06:29 +0000

its amazing..
its very easy understandable…
thank..

By: sabera

sabera — Fri, 06 Nov 2009 14:58:46 +0000

itz very useful to me and its helped me to update my knowledge