Here we will see how to initialize the private static member variables initialization in C++. We can put static members (Functions or Variables) in C++ classes. For the static variables, we have to initialize them after defining the class.
To initialize we have to use the class name then scope resolution operator (::), then the variable name. Now we can assign some value.
The following code will illustrate the of static member initializing technique.
#include <iostream> using namespace std; class MyClass{ private: static int st_var; public: MyClass(){ st_var++; //increase the value of st_var when new object is created } static int getStaticVar() { return st_var; } }; int MyClass::st_var = 0; //initializing the static int main() { MyClass ob1, ob2, ob3; //three objects are created cout << "Number of objects: " << MyClass::getStaticVar(); }
Number of objects: 3