Psy 315 Week 5 Programming Problem Essay

Hw #2

Ch 14

Review Questions and Exercises, P 879: 1, 7, 10, 20, 38, 43, 45, 52, 60, 62;

Programming Challenges, P 884: 4, 5, 6.

Describe the difference between an instance member variable and a static member variable.

The main difference between an instance member variable and a static member variable is each class object has its own copy of class’s instance member variables. If a class’s member variable is static, however, only one instance of the variable exists in memory. All objects of that class have access to that one variable.

7. When is a copy constructor called?

Copy constructor is a special constructor that is called whenever a new object is created and initialized with another object’s data.

10. Why must the parameter of a copy constructor be a reference?

To do that you make a copy, and to do that you call the copy constructor. But to do that, we need to make a new value, so we call the copy constructor

20. Explain the programming steps necessary to make a class’s member function static.

1. Place the key word static before the member function’s prototype.

2. After that place a separate definition of the variable outside the class.

38. Object aggregation is useful for creating a(n) has a relationship between two classes.

43. Assume a class named Collection exists. Write the header for a member function that overloads the [] operator for that class.

Given class name;

Collection

The header for a member function that overloads the [] operator for that class: void Collection:: &operator[](constant Collection &sub)

45. T F Static member variables are defined outside their class declaration.

52. T F You cannot use the = operator to assign one object’s values to another object, unless you overload the operator.

60. class