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CppStatic

(C++) static

Keyword enabling in-class or in-function static variables.

A common use of static is when you want to keep track of how many instances a class has:

  1. include <iostream>
class InstanceCounter { static int mNinstances; public: InstanceCounter() { ++mNinstances; std::cout << "Constructed an instance." << "Now there are " << mNinstances << "." << std::endl; } ~InstanceCounter() { --mNinstances; std::cout << "Destructed an instance." << "Now there are " << mNinstances << "." << std::endl; } }; int InstanceCounter::mNinstances = 0; int main() { InstanceCounter one, two, three, four,five; }


A good example of a static variable in a function is here.

Code links



'static' links



last edited (November 16, 2006) by bilderbikkel, Number of views: 3804, Current Rev: 7 (Diff)

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