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Cream of the Crop 1
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Cream of the Crop 1.iso
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PROGRAM
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CPTUTS22.ARJ
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OBJDYNAM.CPP
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C/C++ Source or Header
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1992-01-20
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1KB
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67 lines
// Chapter 6 - Program 4
#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);
};
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;
}
// This method will calculate and return the area of a box instance
int box::get_area(void)
{
return (length * width);
}
main()
{
box small, medium, large; //Three boxes to work with
box *point; //A pointer to a box
small.set(5, 7);
large.set(15, 20);
point = new box; // Use the defaults supplied by the constructor
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";
cout << "The new box area is " << point->get_area() << "\n";
point->set(12, 12);
cout << "The new box area is " << point->get_area() << "\n";
delete point;
}
// Result of execution
//
// The small box area is 35
// The medium box area is 64
// The large box area is 300
// The new box area is 64
// The new box area is 144