If I declare a base class (or interface class) and specify a default value for one or more of its parameters, do the derived classes have to specify the same defaults and if not, which defaults will manifest in the derived classes? Addendum: I’m also interested in how this may be handled across different compilers … Read more
I’ve read and heard that C++11 supports Unicode. A few questions on that: How well does the C++ standard library support Unicode? Does std::string do what it should? How do I use it? Where are potential problems? 5 Answers 5
Can someone please explain how static variables in member functions work in C++. Given the following class: class A { void foo() { static int i; i++; } } If I declare multiple instances of A, does calling foo() on one instance increment the static variable i on all instances? Or only the one it … Read more
I have written a library that I used to compile using a self-written Makefile, but now I want to switch to cmake. The tree looks like this (I removed all the irrelevant files): . ├── include │ ├── animation.h │ ├── buffers.h │ ├── … │ ├── vertex.h │ └── world.h └── src ├── animation.cpp … Read more
I am new to C++11. I am writing the following recursive lambda function, but it doesn’t compile. sum.cpp #include <iostream> #include <functional> auto term = [](int a)->int { return a*a; }; auto next = [](int a)->int { return ++a; }; auto sum = [term,next,&sum](int a, int b)mutable ->int { if(a>b) return 0; else return term(a) … Read more
Does the default constructor (created by the compiler) initialize built-in-types? 7 Answers 7
From all the material I used to learn C++, auto has always been a weird storage duration specifier that didn’t serve any purpose. But just recently, I encountered code that used it as a type name in and of itself. Out of curiosity I tried it, and it assumes the type of whatever I happen … Read more
Is it safe to check a pointer to not being NULL by writing simply if(pointer) or do I have to use if(pointer != NULL)? 14 Answers 14
I have a weird problem about working with integers in C++. I wrote a simple program that sets a value to a variable and then prints it, but it is not working as expected. My program has only two lines of code: uint8_t aa = 5; cout << “value is ” << aa << endl; … Read more
Is there a built-in vector function in C++ to reverse a vector in place? Or do you just have to do it manually? 7 Answers 7
