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- // Chapter 5 - Program 6
- #include <iostream.h>
-
- class box {
- int length;
- int width;
- public:
- box(void); //Constructor
- void set(int new_length, int new_width);
- int get_area(void) {return (length * width);}
- ~box(void); //Destructor
- };
-
-
- box::box(void) //Constructor implementation
- {
- length = 8;
- width = 8;
- }
-
-
- // This method will set a box size to the two input parameters
- void box::set(int new_length, int new_width)
- {
- length = new_length;
- width = new_width;
- }
-
-
- box::~box(void) //Destructor
- {
- length = 0;
- width = 0;
- }
-
-
- main()
- {
- box small, medium, large; //Three boxes to work with
-
- small.set(5, 7);
- // Note that the medium box uses the values
- // supplied by the constructor
- large.set(15, 20);
-
- cout << "The small box area is " << small.get_area() << "\n";
- cout << "The medium box area is " << medium.get_area() << "\n";
- cout << "The large box area is " << large.get_area() << "\n";
-
- }
-
-
-
-
- // Result of execution
- //
- // The small box area is 35
- // The medium box area is 64
- // The large box area is 300
-