Static method and static variable : static member functions « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. static member functions

#include <iostream>
using namespace std;
class MyClass {
    static int a;
    int b;
  public:
    void set(int i, int j){
      a=i;
      b=j;
    }
    static void show();
};

int MyClass::a;

void MyClass::show(){
  cout << "This is static a: " << a << endl;
}

int main(void) {
  MyClass x, y;

  x.set(1,1);
  y.set(2,2);
  MyClass::show();
  y.show();
  x.show();
}