A bit reversed, but this should work: If you want the counter initialization code at the top instead of the bottom, you can create a decorator: Then use the code like this: It’ll still require you to use the foo. prefix, unfortunately. (Credit: @ony)
The keyword static has several different meanings in C++, and the code you’ve written above uses them in two different ways. In the context of member functions, static means “this member function does not have a receiver object. It’s basically a normal function that’s nested inside of the scope of the class.” In the context … Read more
You can not have static array which size is given as a variable That’s why constants should be #defined: This way preprocessor will replace a with 6, making it valid declaration.
The modifiers must be on the function declarations, otherwise it would be impossible to call the functions given just the declarations. Since they must be on the declarations, it would be redundant to put them on the definitions as well. There’s no particularly good reason to disallow them (as long as they match the declaration), … Read more
The short answer is that not only is static useful, it is pretty well always going to be desired. First, note that static and constexpr are completely independent of each other. static defines the object’s lifetime during execution; constexpr specifies that the object should be available during compilation. Compilation and execution are disjoint and discontiguous, both in time and space. So once the program is … Read more
Static methods can not be overridden in the exact sense of the word, but they can hide parent static methods In practice it means that the compiler will decide which method to execute at the compile time, and not at the runtime, as it does with overridden instance methods. For a neat example have a … Read more
The static keyword in C has several effects, depending on the context it’s applied to. when applied to a variable declared inside a function, the value of that variable will be preserved between function calls. when applied to a variable declared outside a function, or to a function, the visibility of that variable or function is limited … Read more
There are several flavors of arrays, depending on how and where they are declared. Fixed-length Arrays Fixed-length arrays must have their size determined at compile time. You cannot change the size of a fixed-length array after it has been defined. Fixed-length arrays are declared in one of the following ways: In the first three cases, … Read more
The initialization of the static member counter must not be in the header file. Change the line in the header file to And add the following line to your employee.cpp: Reason is that putting such an initialization in the header file would duplicate the initialization code in every place where the header is included.
The non-static block: Gets called every time an instance of the class is constructed. The static block only gets called once, when the class itself is initialized, no matter how many objects of that type you create. Example: This prints: