Notes—Chap. 6b Data Structures and Objects
(pp. 227 – 242)
- Sections 6.3 and 6.4 present the object-oriented analysis, object-oriented
design, and object implementation of a Drill object.
- Object-oriented analysis is the process required to identify the attributes and
behaviors required for one or more classes of objects that are needed in the
developments of some application.
- Object-oriented design is the process required to determine for these
classes the appropriate names and types to represent the attributes and the ,
appropriate function and operator prototypes and algorithms to represent the
behaviors and the appropriate accessibilities.
- Will cover the author's implementation of the Drill class (with revisions):
#include <iostream>
using namespace std;
const double PI = 3.141592654;
class Drill {
public:
Drill()
// Create an uninitialized drill.
{}
Drill(double d, // diameter of drill bit in mm
double f, // feed rate in mm per revolution
double s // rotational speed in revolutions per minute (rpm)
);
// Create a drill with the given diameter, feed, and speed.
double mrr() const;
// Return drill's material removal rate in mm^3/sec.
double torque(double up // unit power dissipated in cutting
// a workpiece material (W . s/mm^3)
) const;
// Return the torque on drill given dissipated unit power up.
private:
double diameter, // diameter of drill bit in mm
feed, // feed rate in mm per revolution
speed; // rotational speed in revolutions per minute (rpm)
