Hands On C++: Project 10

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Hands On C++: Project 10

Objectives

1. Practice designing, declaring and using classes.
2. Practice defining function members.
3. Practice defining friend functions.

Introduction

Each of these projects deals with objects that are not readily modeled using the predefined C++ data types. In each project, you are to build a class to represent the object described, as well as the operations appropriate for such an object. Your instructor will tell you which one of the following projects to do.

Projects

10.1. Extend class Fraction by overloading the remaining arithmetic operators (+, - and /), the six relational operators (==, !=, <, >, <= and >=). Then construct a menu-driven 4-function calculator that an elementary student can use to check his or her fraction homework assignments.

Alternatively, create a "drill" program that generates random fractions (using class RandomInt from C++ An Introduction to Computing), that young students can use to practice their fractional arithmetic.

For extra credit, overload ! as a Fraction "invert" operator (i.e., if fract == n/d, !fract == d/n).

10.2. A quadratic equation has the form

   ax^2 + bx + c = 0

where a, b, and c are all real values. Write a class Quadratic that can be used to model a quadratic equation, with operations to construct, input, output, extract the data members of, evaluate (for a given value of x), and find the x value at which the value of the Quadratic is minimized (or maximized).

To test your class, write a menu-driven program that allows a user to enter a quadratic, and repeatedly process it using any of the provided operations.

10.3. A phone number consists of four separate pieces of information: an area code, an exchange, a local number, and a long-distance indicator (true or false). Design and build a PhoneNumber class that models a phone number, providing operations to construct, input, output extract each of the data members of a PhoneNumber object, and indicate whether or not the number is long-distance. The input operation should read a local or long-distance number and set the long-distance indicator accordingly. The output operation should display a local number differently from the way it displays a long-distance number (e.g., 555-1234 vs. (616) 555-1234).

To test your class, write a program that simulates an intelligent computer modem dialer by reading a PhoneNumber, and displaying the number to be dialed. If the number is a long distance number, it should be preceded by 1-; otherwise it should be displayed as a local number.

10.4. A playing card has two attributes, its rank (e.g., 2, 3, 4, 5, 6, 7, 8, 9, 10, J, Q, K, A) and its suit (e.g., clubs, diamonds, hearts, spades). Design and build a PlayingCard class that models a playing card. Your class should provide operations to construct, input, output, compare, and extract the data members of a PlayingCard object.

A deck of cards is simply a sequence of cards. Design and create a class DeckOfCards that represents such objects by using a vector to store a sequence of PlayingCard values. Your DeckOfCards class should provide operations to construct, shuffle, and take the top card. The class constructor should initialize the DeckOfCards as a new deck of 52 cards (i.e., 2-clubs, 3-clubs, ..., A-clubs, 2-diamonds, ..., A-diamonds, 2-hearts, ..., A-hearts, 2-spades, ..., A-spades). The shuffle operation should rearrange the cards in a deck in random order. The final operation should remove the top card from the deck, and return that card.

To test your classes, write a program that plays a simple card game (i.e., blackjack, go fish, etc.) against a human opponent.

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