Call class constructor without new operator : instance object « Class « C++ Tutorial

1. C++ Tutorial
2. Class
3. instance object

#include <iostream>
using std::cout;
using std::endl;

class Box {
  public:
    double length;
    double width;
    double height;

    // Constructor
    Box(double lengthValue, double widthValue, double heightValue) {
      cout << "Box constructor called" << endl;
      length = lengthValue;
      width = widthValue;
      height = heightValue;
    }

    double volume() {
      return length * width * height;
    }
};

int main() {
  Box firstBox(80.0, 50.0, 40.0);

  cout << "Size of first Box object is "
       << firstBox.length  << " by "
       << firstBox.width << " by "
       << firstBox.height << "\n "
       << "Volume of first Box object is " << firstBox.volume()
       << endl;

  return 0;
}

Box constructor called
Size of first Box object is 80 by 50 by 40
 Volume of first Box object is 160000