STARTING OUT WITH C++ MPL
9th Edition
ISBN: 9780136673989
Author: GADDIS
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 31RQE
A derived class inherits the _____ of its base class.
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Consider the following relations:
Student(snum: integer, sname: string, rmajor: string,
level: string, age: integer)
Class(cname: string, meets_at: time, room: string, fid: integer)
Enrolled(snum: integer, cname: string)
Faculty(fid: integer, fname: string, deptid: integer)
The meaning of these relations is straightforward; for example, Enrolled has one record per student-class pair such that the student is enrolled in the class.
2. Express each of the following integrity constraints in SQL unless it is implied by the primary and foreign key constraint; if so, explain how it is implied. If the constraint cannot be expressed in SQL, say so. For each constraint, state what operations (inserts, deletes, and updates on specific relations) must be monitored to enforce the constraint.
(a) Every faculty member must teach at least two courses.
(b) Every student must be enrolled in the course called 'Math101'.
(c) A student cannot add more than two courses at a time…
Consider the following relational schema. An employee can work in more than one department; the pct_time field of the Works relation shows the percentage of time that a given employee works in a given department.
Emp(eid: integer, ename: string, age: integer, salary: real)
Works(eid: integer, did: integer, pct_time: integer)
Dept(did: integer, budget: real, managerid: integer)
Write the following queries in SQL:
a. Print the name of each employee whose salary exceeds the budget of all of the departments that he or she works in.
b. Find the enames of managers who manage only departments with budgets larger than $1 million, but at least one department with budget less than $5 million.
Consider the following schema:
Suppliers(sid: integer, sname: string, address: string)
Parts(pid: integer, pname: string, color: string)
Catalog(sid: integer, pid: integer, cost: real)
The Catalog relation lists the prices charged for parts by suppliers.
Write the following queries in SQL:
a. Find the sids of suppliers who charge more for some part than the average cost of that part (averaged over all the suppliers who supply that part).
b. Find the sids of suppliers who supply a red part or a green part.
c. For every supplier that supplies a green part and a red part, print the name and price of the most expensive part that she supplies.
Chapter 11 Solutions
STARTING OUT WITH C++ MPL
Ch. 11.3 - What is the difference between an instance member...Ch. 11.3 - Static member variables are declared inside the...Ch. 11.3 - Does a static member variable come into existence...Ch. 11.3 - What limitation does a static member function...Ch. 11.3 - What action is possible with a static member...Ch. 11.3 - If class X declares function f as a friend, does...Ch. 11.3 - Suppose that class Y is a friend of class X,...Ch. 11.5 - Briefly describe what is meant by memberwise...Ch. 11.5 - Prob. 11.9CPCh. 11.5 - Prob. 11.10CP
Ch. 11.5 - When is a copy constructor called?Ch. 11.5 - How does the compiler know that a member function...Ch. 11.5 - What action is performed by a classs default copy...Ch. 11.6 - Assume there is a class named Pet. Write the...Ch. 11.6 - Assume that dog and cat are instances of the Pet...Ch. 11.6 - What is the disadvantage of an overloaded ...Ch. 11.6 - Prob. 11.17CPCh. 11.6 - Prob. 11.18CPCh. 11.6 - Assume there is a class named Animal, which...Ch. 11.6 - Prob. 11.20CPCh. 11.6 - Describe the values that should he returned from...Ch. 11.6 - Prob. 11.22CPCh. 11.6 - What type of object should an overloaded operator...Ch. 11.6 - Prob. 11.24CPCh. 11.6 - If an overloaded or operator accesses a private...Ch. 11.6 - Prob. 11.26CPCh. 11.6 - When overloading a binary operator such as or as...Ch. 11.6 - Explain why overloaded prefix and postfix and ...Ch. 11.6 - Prob. 11.29CPCh. 11.6 - Overload the function call operator ( ) (int i,...Ch. 11.8 - Prob. 11.31CPCh. 11.8 - How is the type declaration of an r value...Ch. 11.8 - Prob. 11.33CPCh. 11.8 - Prob. 11.34CPCh. 11.8 - Which operator must be overloaded in a class...Ch. 11.8 - Prob. 11.36CPCh. 11.10 - What arc the benefits of having operator functions...Ch. 11.10 - Prob. 11.38CPCh. 11.10 - Assume that there is a class named BlackBox. Write...Ch. 11.10 - Assume there are two classes, Big and Smal1.Write...Ch. 11.13 - What type of relationship between classes is...Ch. 11.13 - Why does it make sense to think of a base class as...Ch. 11.13 - What is a base class access specification?Ch. 11.13 - Think of an example of two classes where one class...Ch. 11.13 - What is the difference between private members and...Ch. 11.13 - What is the difference between member access...Ch. 11.13 - Suppose a program has the following class...Ch. 11.14 - What is the reason that base class constructors...Ch. 11.14 - Why do you think the arguments to a base class...Ch. 11.14 - Passing arguments to base classes constructors...Ch. 11.14 - What will the following program display? #include...Ch. 11.14 - What will the following program display? #include...Ch. 11 - If a member variable is declared _____, all...Ch. 11 - Static member variables are defined _____ the...Ch. 11 - A(n) _____ member function cannot access any...Ch. 11 - A static member function may be called _____ any...Ch. 11 - A(n) _____ function is not a member of a class,...Ch. 11 - A(n) _____ tells the compiler that a specific...Ch. 11 - _____ is the default behavior when an object is...Ch. 11 - A(n) _____ is a special constructor, called...Ch. 11 - _____ is a special built-in pointer that is...Ch. 11 - An operator may be _____ to work with a specific...Ch. 11 - When the _____ operator is overloaded, its...Ch. 11 - Making an instance of one class a member of...Ch. 11 - Object composition is useful for creating a(n)...Ch. 11 - A constructor that takes a single parameter of a...Ch. 11 - The class Stuff has both a copy constructor and an...Ch. 11 - Explain the programming steps necessary to make a...Ch. 11 - Explain the programming steps necessary to make a...Ch. 11 - Consider the following class declaration: class...Ch. 11 - Describe the difference between making a class a...Ch. 11 - What is the purpose of a forward declaration of a...Ch. 11 - Explain why memberwise assignment can cause...Ch. 11 - Explain why a classs copy constructor is called...Ch. 11 - Explain why the parameter of a copy constructor...Ch. 11 - Assume a class named Bird exists. Write the header...Ch. 11 - Assume a class named Dollars exists. Write the...Ch. 11 - Assume a class named Yen exists. Write the header...Ch. 11 - Assume a class named Length exists. Write the...Ch. 11 - Assume a class named Collection exists. Write the...Ch. 11 - Explain why a programmer would want to overload...Ch. 11 - Each of the following class declarations has...Ch. 11 - A derived class inherits the _____ of its base...Ch. 11 - The base class named in the following line of code...Ch. 11 - The derived class named in the following line of...Ch. 11 - In the following line of code, the class access...Ch. 11 - In the following line of code, the class access...Ch. 11 - Protected members of a base class are like _____...Ch. 11 - Complete the following table by filling in...Ch. 11 - Complete the following table by filling in...Ch. 11 - Complete the following table by filling in...Ch. 11 - When both a base class and a derived class have...Ch. 11 - When both a base class and a derived class have...Ch. 11 - An overridden base class function may be called by...Ch. 11 - Each of the following class declarations and/or...Ch. 11 - Soft Skills 44. Your companys software is a market...Ch. 11 - Check Writing Design a class Numbers that can be...Ch. 11 - Day of the Year Assuming that a year has 365 days,...Ch. 11 - Day of the Year Modification Modify the DayOfYear...Ch. 11 - Number of Days Worked Design a class called...Ch. 11 - Palindrome Testing A palindrome is a string that...Ch. 11 - Prob. 6PCCh. 11 - Corporate Sales A corporation has six divisions,...Ch. 11 - Prob. 8PCCh. 11 - Rational Arithmetic II Modify the class Rational...Ch. 11 - HTML Table of Names and Scores Write a class whose...Ch. 11 - Prob. 11PC
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