Teach Yourself Borland C++ in 14 Days - portal

130 Day 4
Quiz
Q Do I have to understand every aspect of file I/O to program in C++Builder?
A No. C++Builder has plenty of built-in file I/O through its use of components. A
basic understanding of file I/O is a good idea in any case. As always, it depends on
what your program does.
Q Can I open a file in such a way that I can read from and write to the file as
needed?
A Yes. In addition to the file I/O classes I discussed in this chapter, there is also a class
called fstream. This class allows you to read from a file, write to the file, and
reposition the file pointer as needed.
1. How do classes and structures differ in C++?
2. What is the purpose of having private data members and functions?
3. How can you keep data members private, yet allow users to read and set their
values?
4. How and when is a class’s destructor called?
5. What does it mean to override a function of the base class?
6. How can you override a base class function and still get the benefit of the operation
the base class function performs?
7. What does an initializer list do?
8. Can a class contain other class instances as data members?
9. How can you get the functionality of two separate classes all rolled into a single
class?
Exercises
1. Write a class that takes a person’s height in inches and returns the height in feet.
2. Derive a class from the class in exercise 1 that also returns the height in meters,
centimeters, or millimeters. (Hint: There are 25.4 millimeters in an inch.)
3. Write a program that takes user input and writes it to a data file.
4. Modify the program in exercise 3 so that it reads the data file and displays the
output after the file is written.
5. Take a day off from work. You’ve earned it!