The !! operator reassures the lint tool that what you wrote is what you meant: do this operation, then take the truth value of the result. A third use is to produce logical XOR and logical XNOR.

I recently saw the above operator in a code,I googled for it but found nothing.The code is below.Please describe what actually does this operator do? #include<stdio.h> int main() { …

Jun 7, 2011 · What is the ?: (question mark and colon operator aka. conditional or "ternary") operator and how can I use it?

Apr 26, 2012 · Ternary operator refers to any operator with three parameters, thus this is a ternary operator but not the ternary operator. Major languages (C#, Java, PHP) consider it a …

Jan 13, 2013 · I wonder if adding something like pipe equal operator to this question or any other documentation on the topic wouldn't help people searching.

In general I think the base class should define a operator== overload (internally or via friend class doesn't matter) which check typeid equality and calls an abstract virtual "equals" function …

Class& operator @= (const Class& rhs); That is, the function takes its parameter by const reference (because it doesn't modify it), then returns a mutable reference to the object.

Nov 24, 2017 · The overloadable operator <=> is a three-way comparison function and has precedence higher than < and lower than <<. It returns a type that can be compared against …

Assuming that we're talking about overloading operator << for all classes derived from std::ostream to handle the Matrix class (and not overloading << for Matrix class), it makes …

The %*% operator is used to multiply two matrices. I didn't realise 'matrix multiplication' was an established algebraic method so it was useful to learn the underlying calculation, not yet …