Please answer the following questions. 1. Define a class named "BoolVariable" that manages a variable name (string) and a boolean value (true or false). It should not have default constructor. The class must at least provide the following methods: o toString() method that can return a string in the following format: variable-name(variable-boolean-value) such as isSuccessful(true) o containsIgnoreCase() that accepts a search string and it will return true if its variable name contains that string (case-insensitive) and false otherwise. Show how this class being used to create objects and call all its methods and show how they work.
Please answer the following questions. 1. Define a class named "BoolVariable" that manages a variable name (string) and a boolean value (true or false). It should not have default constructor. The class must at least provide the following methods: o toString() method that can return a string in the following format: variable-name(variable-boolean-value) such as isSuccessful(true) o containsIgnoreCase() that accepts a search string and it will return true if its variable name contains that string (case-insensitive) and false otherwise. Show how this class being used to create objects and call all its methods and show how they work.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question 3:
Transcribed Image Text:Please answer the following questions.
1. Define a class named "BoolVariable" that manages a variable name (string)
and a boolean value (true or false). It should not have default constructor.
The class must at least provide the following methods:
o toString() method that can return a string in the following format:
variable-name(variable-boolean-value) such as isSuccessful(true)
o containsIgnoreCase() that accepts a search string and it will return true if
its variable name contains that string (case-insensitive) and false
otherwise.
Show how this class being used to create objects and call all its methods and show
how they work.
2. Define a new exception class named "VarNameException" that must inherit
from the C++ runtime error class. This class will capture the error case for a
variable name when it is empty, only blanks or starting with a number.
For example, if the user tries to create with a variable name of ",
"Iname", it will generate an exception and this class should capture the reason
and the error value.
*, or
3. Write a new class named "IntVariable" that must inherit from the
"BoolVariable" class. This class manages a variable name (string) and a value
(integer). Please note that this class must make use of inheritance.
The class must at least provide the following methods:
o toString() method that can return a string in the following format:
variable-name(variable-integer-value) such as count(100)
o isGreater() method that accepts another IntVariable object and returns true
if its own integer value is greater than the integer value of the given object
and false otherwise.
Its constructor will generate exception with the right error information
using the VarNameException class whenever it is given a variable name
that can be empty, all blanks or starting with a number.
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