Share static variable among different class instances : member variable « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. member variable

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

int MyClass::a;

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

int main(void){
  MyClass x, y;

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