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I've stumbled upon strange behavior when using operator+ on QStrings until I found out that QString doesn't overload operator+ (in contrary to std::string). What reasons are there not to do it (especially since they overloaded quite a bunch of other operators)?
Edit: Sorry, I have looked up the wrong section in the docs. Can someone please close the question?
It does provides the + operator, but the question is what you have at the right hand side?
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Do the conventions in a programming language such as in C++ (such as extraction operator >> ) can be changed by a developer? Or is it restricted?
You're asking two questions here.
Who makes the C++ Standard?
The C++ Standards Committee
Can I change the behavior of an operator such as operator>>?
Yes, you can, via a capability defined in the standard. See:
http://en.cppreference.com/w/cpp/language/operators
What are the basic rules and idioms for operator overloading?
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I was given a question: how operator overloading in C++ impacts on performance?
I'm not pretty sure how to answer it. I fully understand the idea and how to overload operators in C++, but what about performance?
Calling an overloaded operator is the same as calling any function in the object. If you mark the operator as inline, you get the same benefits (or lack thereof) as any other inline function.
Nothing complicated at all.
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When I used a WebService, It me a HTML type data, i.e the whole website HTML document.
I saw a code sample before, It's suppose to provide XML type.
I tried, can't figure what's going on.
It turns out that it was my parameters mistake.
Check your character spelling before doing other things when you're a newbie.
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During an interview for the position of C/C++ , I faced one question Write a c program to implement sizeof operator ,I have wrote the code ,Then he asked me to implement using bitwise operations .I tried for int.... But I coudlnt ,,,, anyone can post the code ,, how to implement ,,,
You cannot do this, since the set of data types that support bitwise operations is not a superset of the set of types that support sizeof.
Proof: int*.
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I'm trying to understand in a simple raytracer what does the BSDF function does and in theory I got it but in practice I don't know how to implement one.
Can someone point me out some simple examples (well-explained if possible) on how to use it?
check PBRT project. It is great book, but if you do not want to read it, there is well documented source code availabe: PBRT