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  1. // www.tutorialspoint.com/cplusplus/cpp_static_members.htm
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6. class Box {
  7.    public:
  8.       static int objectCount;
  9.  
  10.       // Constructor definition
  11.       Box(double l = 2.0, double b = 2.0, double h = 2.0) {
  12.          cout <<"Constructor called." << endl;
  13.          length = l;
  14.          breadth = b;
  15.          height = h;
  16.  
  17.          // Increase every time object is created
  18.          objectCount++;
  19.       }
  20.       double Volume() {
  21.          return length * breadth * height;
  22.       }
  23.  
  24.    private:
  25.       double length;     // Length of a box
  26.       double breadth;    // Breadth of a box
  27.       double height;     // Height of a box
  28. };
  29.  
  30. // Initialize static member of class Box
  31. int Box::objectCount = 0;
  32.  
  33. int main(void) {
  34.    Box Box1(3.3, 1.2, 1.5);    // Declare box1
  35.    Box Box2(8.5, 6.0, 2.0);    // Declare box2
  36.  
  37.    // Print total number of objects.
  38.    cout << "Total objects: " << Box::objectCount << endl;
  39.  
  40.    return 0;
  41. }
Success #stdin #stdout 0.01s 5448KB
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Standard input is empty
stdout
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Constructor called.
Constructor called.
Total objects: 2
https://ideone.com/eJniNm
language:
C++14 (clang 8.0)
created:
1 year ago
visibility:
public

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