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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
When passing argument to main() in a C or C++ application, will argv[0] always be the name of the executable? Or is this just a common convention and not guaranteed to be true 100% of the time?
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Why use #ifndef CLASS_H and #define CLASS_H in .h file but not in .cpp?
...his prevents redefinition errors.
And to address your second concern:
In C++ programming as a general practice we separate development into two file types. One is with an extension of .h and we call this a "header file." They usually provide a declaration of functions, classes, structs, global v...
What is the point of a private pure virtual function?
...ic suggest a pretty common confusion. The confusion is common enough, that C++ FAQ advocated against using private virtuals, for a long time, because confusion seemed to be a bad thing.
So to get rid of the confusion first: Yes, private virtual functions can be overridden in the derived classes. Me...
Why isn't sizeof for a struct equal to the sum of sizeof of each member?
...) (like structure Z in the example above).
IMPORTANT NOTE: Both the C and C++ standards state that structure alignment is implementation-defined. Therefore each compiler may choose to align data differently, resulting in different and incompatible data layouts. For this reason, when dealing with ...
What's the point of g++ -Wreorder?
...r a warning. I thought I'd provide some historical context. The creator of C++, Bjarne Stroustrup, explains in his book The C++ programming language (3rd edition, Page 259):
The members’ constructors are called before the body of the containing class’ own constructor is executed. The constru...
Difference between passing array and array pointer into function in C
... There is a difference when using (at least some older) MSVC C++ compilers, due to the compiler incorrectly mangling the function name differently in the two cases (while recognizing that they are the same otherwise), resulting in link problems. See "Won't fix" bug report here connect....
smart pointers (boost) explained
...nce the same object. Transfer of ownership cannot really be implemented in C++ currently, because there are no means to transfer something from one object to another supported by the language: If you try to return an object from a function, what is happening is that the object is copied. So a smart ...
Difference between “managed” and “unmanaged”
...pplication managed by the CLR. If you are writing an application in Visual C++ .NET you can produce managed code if you like, but it's optional.
Unmanaged Code
Unmanaged code compiles straight to machine code. So, by that definition all code compiled by traditional C/C++ compilers is 'unmanaged co...
What is better, adjacency lists or adjacency matrices for graph problems in C++?
What is better, adjacency lists or adjacency matrix, for graph problems in C++?
What are the advantages and disadvantages of each?
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std::unique_ptr with an incomplete type won't compile
...e for unique_ptr are set to {nullptr} in the header file of the class with c++11 style, a complete declaration is also needed for the above reason.
– feirainy
Apr 11 '19 at 5:16
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