Starting Out with C++: Early Objects (9th Edition)

9th Edition

ISBN: 9780134400242

Author: Tony Gaddis, Judy Walters, Godfrey Muganda

Publisher: PEARSON

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Textbook Question

Chapter 15, Problem 5PC

File Filter

A file filter reads an input file, transforms it in some way, and writes the results to an output file. Write an abstract file filter class that defines a pure virtual function for transforming a character. Create one subclass of your file filter class that performs encryption, another that transforms a file to all uppercase, and another that creates an unchanged copy of the original file.

The class should have a member function

void doFilter(ifstream &in, ofstream &out)

that is called to perform the actual filtering. The member function for transforming a single character should have the prototype

char transform(char ch)

The encryption class should have a constructor that takes an integer as an argument and uses it as the encryption key.

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Chapter 15, Problem 4PC

Chapter 15, Problem 6PC

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Chapter 15 Solutions

Starting Out with C++: Early Objects (9th Edition)

Ch. 15.3 - Prob. 15.1CP Ch. 15.3 - Prob. 15.2CP Ch. 15.3 - What will the following program display? #include...Ch. 15.3 - What will the following program display? #include...Ch. 15.3 - What will the following program display? #include...Ch. 15.3 - What will the following program display? #include...Ch. 15.3 - How can you tell from looking at a class...Ch. 15.3 - What makes an abstract class different from other...Ch. 15.3 - Examine the following classes. The table lists the...Ch. 15 - A class that cannot be instantiated is a(n) _____...

Ch. 15 - A member function of a class that is not...Ch. 15 - A class with at least one pure virtual member...Ch. 15 - In order to use dynamic binding, a member function...Ch. 15 - Static binding takes place at _____ time.Ch. 15 - Prob. 6RQE Ch. 15 - Prob. 7RQE Ch. 15 - Prob. 8RQE Ch. 15 - The is-a relation between classes is best...Ch. 15 - The has-a relation between classes is best...Ch. 15 - If every C1 class object can be used as a C2 class...Ch. 15 - A collection of abstract classes defining an...Ch. 15 - The keyword _____ prevents a virtual member...Ch. 15 - To have the compiler check that a virtual member...Ch. 15 - C++ Language Elements Suppose that the classes Dog...Ch. 15 - Will the statement pAnimal = new Cat; compile?Ch. 15 - Will the statement pCreature = new Dog ; compile?Ch. 15 - Will the statement pCat = new Animal; compile?Ch. 15 - Rewrite the following two statements to get them...Ch. 15 - Prob. 20RQE Ch. 15 - Find all errors in the following fragment of code,...Ch. 15 - Soft Skills 22. Suppose that you need to have a...Ch. 15 - Prob. 1PC Ch. 15 - Prob. 2PC Ch. 15 - Sequence Sum A sequence of integers such as 1, 3,...Ch. 15 - Prob. 4PC Ch. 15 - File Filter A file filter reads an input file,...Ch. 15 - Prob. 6PC Ch. 15 - Bumper Shapes Write a program that creates two...Ch. 15 - Bow Tie In Tying It All Together, we defined a...

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