Starting Out With C++: Early Objects (10th Edition)
10th Edition
ISBN: 9780135235003
Author: Tony Gaddis, Judy Walters, Godfrey Muganda
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 7, Problem 5PC
Population
In a population, the birth rate and death rate are calculated as follows:
Birth Rate = Number of Births ÷ Population
Death Rate = Number of Deaths ÷ Population
For example, in a population of 100,000 that has 8,000 births and 6,000 deaths per year,
Birth Rate = 8,000 ÷ 100,000 = 0.08
Death Rate = 6,000 ÷100,000 = 0.06
Design a Population class that stores a current population, annual number of births, and annual number of deaths for some geographic area. The class should allow these three values to be set in either of two ways: by passing arguments to a three-parameter constructor when a new Population object is created or by calling the setPopulation, setBirths, and setDeaths class member functions. In either case, if a population figure less than 2 is passed to the class, use a default value of 2. If a birth or death figure less than 0 is passed in, use a default value of 0. The class should also have getBirthRate and getDeathRate functions that compute and return the birth and death rates. Write a short program that uses the Population class and illustrates its capabilities.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Quadratic equations
The form of a quadratic equation is ax2 + bx + c = 0.
Write a program that solves a quadratic equation in all cases, including when both roots are complex numbers. Remember that the solutions are
x = (-b + sqrt(b2 -4ac))/2a and (-b - sqrt(b2 -4ac))/2a
For this you will need to set up the following classes:
Complex: Encapsulates a complex number.
ComplexPair: Encapsulates a pair of complex numbers.
Quadratic: Encapsulates a quadratic equation. – Assume the coefficients are all of type int for this example.
SolveEquation: Contains the main method. (I give this to you it is shown below)
Along with the usual constructors, accessors and mutators you will need the following additional methods:
In the Complex class a method called isReal to determine whether a complex object is real or not returning a boolean value.
In the ComplexPair class a method bothIdentical that determines if both complex numbers are identical, returning a boolean value.
In the…
inventory.py templete
#========The beginning of the class ==========
classShoe:
def__init__(self,country,code,product,cost,quantity):
pass
''' In this function, you must initialise the following attributes:
● country,
● code,
● product,
● cost,
and ● quantity.
'''
defget_cost(self):
pass
''' Add the code to return the cost of the shoe in this method. '''defget_quantity(self):pass''' Add the code to return the quantity of the shoes. '''
def__str__(self):
pass
''' Add a code to returns a string representation of a class. '''
#=============Shoe list==========='''The list will be used to store a list of objects of shoes.'''
shoe_list=[]
#==========Functions outside the class==============
defread_shoes_data():
pass
''' This function will open the file inventory.txt and read the data from this file, then create a shoes object with this data and append this object into the shoes list. One line in this file represents data to create one object of shoes. You must use the try-except in this…
esign a class named WorkingDays. The purpose of the class is to store a value that represents number of hours worked and then convert it into number of days worked according to the formula given below:
8 working hours = 1 working day
For example:
v 8 hours would be equal to 1 day
v 12 hours would be equal to 1.5 days
v 18 hours would be equal to 2.25 days
Chapter 7 Solutions
Starting Out With C++: Early Objects (10th Edition)
Ch. 7.5 - Which of the following shows the correct use of...Ch. 7.5 - An objects private member variables can be...Ch. 7.5 - Assuming that soap is an instance of the Inventory...Ch. 7.5 - Complete the following code skeleton to declare a...Ch. 7.7 - Briefly describe the purpose of a constructor.Ch. 7.7 - Constructor functions have the same name as the A)...Ch. 7.7 - A constructor that requires no arguments is called...Ch. 7.7 - Assume the following is a constructor: ClassAct: :...Ch. 7.7 - Prob. 7.9CPCh. 7.7 - True or false: A class may have a constructor with...
Ch. 7.7 - A destructor function name always starts with A) a...Ch. 7.7 - True or false: Just as a class can have multiple...Ch. 7.7 - What will the following program code display on...Ch. 7.7 - What will the following program code display on...Ch. 7.9 - 7.15 private class member function can be called...Ch. 7.9 - When an object is passed to a function, a copy of...Ch. 7.9 - If a function receives an object as an argument...Ch. 7.9 - Prob. 7.18CPCh. 7.9 - Prob. 7.19CPCh. 7.10 - Prob. 7.20CPCh. 7.10 - Write a class declaration for a class named...Ch. 7.10 - Write a class declaration for a class named Pizza...Ch. 7.10 - Write four lines of code that might appear in a...Ch. 7.11 - Assume the following class components exist in a...Ch. 7.11 - What header files should be included in the client...Ch. 7.12 - Write a structure declaration for a structure...Ch. 7.12 - Prob. 7.27CPCh. 7.12 - Prob. 7.28CPCh. 7.12 - Write a declaration for a structure named...Ch. 7.12 - Write a declaration for a structure named City,...Ch. 7.12 - Write assignment statements that store the...Ch. 7.12 - Prob. 7.32CPCh. 7.12 - Write a function that uses a Rectangle structure...Ch. 7.12 - Prob. 7.34CPCh. 7.15 - Prob. 7.35CPCh. 7.15 - When designing an object -oriented application,...Ch. 7.15 - How do you identify the potential classes in a...Ch. 7.15 - What two questions should you ask to determine a...Ch. 7.15 - Look at the following description of a problem...Ch. 7 - Prob. 1RQECh. 7 - Which of the following must a programmer know...Ch. 7 - Prob. 3RQECh. 7 - ______programming is centered around functions, or...Ch. 7 - An object is a software entity that combines both...Ch. 7 - An object is a(n) ______ of a class.Ch. 7 - Prob. 7RQECh. 7 - Once a class is declared, how many objects can be...Ch. 7 - An objects data items are stored in its...Ch. 7 - The procedures, or functions, an object performs...Ch. 7 - Bundling together an objects data and procedures...Ch. 7 - An objects members can be declared public or...Ch. 7 - Normally a classs _________ are declared to be...Ch. 7 - A class member function that uses, but does not...Ch. 7 - A class member function that changes the value of...Ch. 7 - When a member functions body is written inside a...Ch. 7 - A class constructor is a member function with the...Ch. 7 - A constructor is automatically called when an...Ch. 7 - Constructors cannot have a(n) ______ type.Ch. 7 - A(n) ______ constructor is one that requires no...Ch. 7 - A destructor is a member function that is...Ch. 7 - A destructor has the same name as the class but is...Ch. 7 - A constructor whose parameters all have default...Ch. 7 - A class may have more than one constructor, as...Ch. 7 - Prob. 25RQECh. 7 - In general, it is considered good practice to have...Ch. 7 - When a member (unction forms part of the interface...Ch. 7 - When a member function performs a task internal to...Ch. 7 - True or false: A class object can be passed to a...Ch. 7 - Prob. 30RQECh. 7 - It is considered good programming practice to...Ch. 7 - If you were writing a class declaration for a...Ch. 7 - If you were writing the definitions for the Canine...Ch. 7 - A structure is like a class but normally only...Ch. 7 - By default, are the members of a structure public...Ch. 7 - Prob. 36RQECh. 7 - When a structure variable is created its members...Ch. 7 - Prob. 38RQECh. 7 - Prob. 39RQECh. 7 - Prob. 40RQECh. 7 - Prob. 41RQECh. 7 - Write a function called showReading. It should...Ch. 7 - Write a function called input Reading that has a...Ch. 7 - Write a function called getReading, which returns...Ch. 7 - Indicate whether each of the following enumerated...Ch. 7 - Prob. 46RQECh. 7 - Assume a class named Inventory keeps track of...Ch. 7 - Write a remove member function that accepts an...Ch. 7 - Prob. 49RQECh. 7 - A) struct TwoVals { int a, b; } ; int main() { }...Ch. 7 - A) struct Names { string first; string last; } ;...Ch. 7 - A) class Circle: { private double centerX; double...Ch. 7 - A) class DumbBell; { int weight; public: void set...Ch. 7 - If the items on the following list appeared in a...Ch. 7 - Look at the following description of a problem...Ch. 7 - Soft Skills Working in a team can often help...Ch. 7 - Date Design a class called Date that has integer...Ch. 7 - Report Heading Design a class called Heading that...Ch. 7 - Widget Factory Design a class for a widget...Ch. 7 - Car Class Write a class named Car that has the...Ch. 7 - Population In a population, the birth rate and...Ch. 7 - Gratuity Calculator Design a Tips class that...Ch. 7 - Inventory Class Design an Inventory class that can...Ch. 7 - Movie Data Write a program that uses a structure...Ch. 7 - Movie Profit Modify the Movie Data program written...Ch. 7 - Prob. 10PCCh. 7 - Prob. 11PCCh. 7 - Ups and Downs Write a program that displays the...Ch. 7 - Wrapping Ups and Downs Modify the program you...Ch. 7 - Left and Right Modify the program you wrote for...Ch. 7 - Moving Inchworm Write a program that displays an...Ch. 7 - Coin Toss Simulator Write a class named Coin. The...Ch. 7 - Tossing Coins for a Dollar Create a game program...Ch. 7 - Fishing Came Simulation Write a program that...Ch. 7 - Group Project 19. Patient Fees This program should...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Practice Problem 3.43 (solution page 344) Suppose you are given the job of checking that a C compiler generates...
Computer Systems: A Programmer's Perspective (3rd Edition)
Explain how entities are transformed into tables.
Database Concepts (7th Edition)
Under what circumstances does an object become a candidate for garbage collection?
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
What Visual Basic function would you use to get the current time from the system, without the date?
Starting Out With Visual Basic (8th Edition)
Summarize the booting process.
Computer Science: An Overview (13th Edition) (What's New in Computer Science)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- In a population, the birth rate and death rate are calculated as follows:Birth Rate = Number of Births ÷ Population Death Rate = Number of Deaths ÷ PopulationFor example, in a population of 100,000 that has 8,000 births and 6,000 deaths 2per year,Birth Rate = 8,000 ÷ 100,000 = 0.08 Death Rate = 6,000 ÷ 100,000 = 0.06Design a Population class that stores a current population, annual number of births, and annual number of deaths for some geographic area. The class should allow these three values to be set in either of two ways: by passing arguments to a three-parameter constructor when a new Population object is created or by calling the set_population, set_births, and set_deaths class member functions. The class should also have get_birth_rate and get_death_rate functions that compute and return the birth and death rates. Write a short program that uses the Population class and illustrates its capabilities.Input Validation: If a population figure less than 2 is passed to the class, use…arrow_forwardInvoicing.java Create a class named Invoicing (no instance private data fields) that includes three overloaded computeInvoice() methods and one displayDetails() method for a book store: see pages 140 and 183 for examples... * Define a constant for the 8% tax rate at the top of the Invoicing class. Set the TAXRATE double constant to 0.08. Do not set to a whole number. When computeInvoice() receives a single parameter, it represents the price of one book ordered. Calculate the tax using the TAXRATE constant. Add the tax to the price and save the total due in a variable. Call the displayDetails() method, defined in the computeInvoice() class, being sure to pass the total due as an argument to the display method. * When computeInvoice() receives two parameters, they represent the price of a book and the quantity ordered. Multiply the price times quantity, calculate the tax using the TAXRATE constant, and calculate the total due. Call the displayDetails() method, defined in the…arrow_forward(Date Class) Create a class called Date that includes three pieces of information as datamembers—a month (type int), a day (type int) and a year (type int). Your class should have a constructor with three parameters that uses the parameters to initialize the three data members. For thepurpose of this exercise, assume that the values provided for the year and day are correct, but ensurethat the month value is in the range 1–12; if it isn’t, set the month to 1. Provide a set and a get function for each data member. Provide a member function displayDate that displays the month, dayand year separated by forward slashes (/). Write a test program that demonstrates class Date’s capabilities.arrow_forward
- Problem: Employee and ProductionWorker Classes Write a python class named ProductionWorker that is a subclass of the Employee class. The ProductionWorker class should keep data attributes for the following information: • Shift number (an integer, such as 1, 2, or 3)• Hourly pay rateThe workday is divided into two shifts: day and night. The shift attribute will hold an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Write the appropriate accessor and mutator methods for this class. Once you have written the class, write a program that creates an object of the ProductionWorker class, and prompts the user to enter data for each of the object’s data attributes. Store the data in the object, then use the object’s accessor methods to retrieve it and display it on the screen Note: The program should be written in python. Sample Input/Output: Enter the name: Ahmed Al-AliEnter the ID number: 12345Enter the department:…arrow_forwardDirectionsThe total cost of a group of items at a grocery store is based on the sum of the individual product prices and the tax (which is 5.75%). Products that are considered “necessities” are not taxed, whereas products that are considered “luxuries” are. For this practice problem you will need to download Shopping Trip Starting Code.zip The Product class is abstract, and it has a method called getTotalPrice. Your task is to create two subclasses of Product: NecessaryProduct and LuxuryProduct and implement the getTotalPrice method in each of these classes appropriately.Then modify the driver program to instantiate four products (two necessary and two luxury) and store them in the product array, print out each item in the array, and display the total cost of the items. You should not make any change at all to Product.java, and you should only add to ShoppingTripStartingCode.java. Do not change any code that is already present. Make sure that it is for anygiven…arrow_forwardMortgage Calculator In this exercise, you will be completing part of the MortgageCalc class. The MortgageCalc class is a class containing static methods to help calculate elements related to home loans, such as a payment calculator, principal payment calculator, and a remaining principal balance calculator. You will write two methods of the class. public class MortgageCalc { /** * This method calculates the monthly payments for a mortgage payment * @param principal Initial amount of the loan * @param numPayments number of months in the loan * @return the monthly payment for the loan */ public static double payment(double principal, int numPayments) { /* To Be implemented in part A */ } /** * This method returns the remaining balance for a given month * in the loan. * @param originalBal original balance of the loan * @param numPayments original number of months in the loan * @param currPeriod the month to calculate the remaining balance * @return the remaining balance on the…arrow_forward
- Question Create a class called Quadratic for performing arithmetic on and solving quadratic equations. A quadratic equation is an equation of the form ax2 + bx + c = 0 Where a !=0. Use double variables to represent the values of a, b, and c and provide a constructor that enables objects of this class to be initialized when they are created. Give default values of a = 1, b = 0, and c = 0. Create a char variable called variable to represent the variable used in the equation and give it a default value of x. The constructor should not allow the value of a to be 0. If 0 is given, assign 1 to a). Provide public member functions that perform the following tasks. add—adds two Quadratic equations by adding the corresponding values of a, b, and c. The function takes another object of type Quadratic as its parameter and adds it to the calling object. subtract—subtracts two Quadratic equations by subtracting corresponding values of a, b, and…arrow_forwardProgramming Language = Python 1. Employee and ProductionWorker Classes Write an Employee class that keeps data attributes for the following pieces of information: • Employee name • Employee number Next, write a class named ProductionWorker that is a subclass of the Employee class. The ProductionWorker class should keep data attributes for the following information: • Shift number (an integer, such as 1, 2, or 3) • Hourly pay rate The workday is divided into two shifts: day and night. The shift attribute will hold an integer value representing the shift that the employee works. The day shift is shift 1 and the night shift is shift 2. Write the appropriate accessor and mutator methods for each class. Once you have written the classes, write a program that creates an object of the ProductionWorker class and prompts the user to enter data for each of the object’s data attributes. Store the data in the object and then use the object’s accessor methods to retrieve it and display it on the…arrow_forwardYou are required to design an Movie class which has following attributes String title; String director; Int duration; String release_Date; Provide default & Parameterized constructors. Provide getters & setters for data members. Provide a toString() method to print values. Now create an array of Movie store values in it (take values form user). After that you have to print the following All the movies in the array. Movie’s whose name starts with ‘a’; Movie with longest duration. All the movies having release date before 25-3-2021.arrow_forward
- c++ Declare an Animal class that has the attributes of Name, Genus, and Weight. Declare four (4) specific animal classes that inherit attributes from the Animal class. In the lab we built two, Duck and Butterfly. Implement show() and speak() methods for each subclass. These methods will also be virtual classes in Animal and will allow the use of an array of Animal* in the main(). Your program should ask the user for the number of animals they would like in there zoo. Allow the user to select each animal from the animal subclasses you have implemented. Store the selections in an array of Animal*. After the user has selected all the animals, step thru the array and have each animal show() and speak() in a sort of parade of selected animals. I'm having a problem with the error message and why it won't display to ascii art and have the user input --- This is my code so far --- /* * File: Zoo.cpp * Author: * Course: CS I * Assignment: What's In Your Zoo? * Due date: 11/10/21 * *…arrow_forward:Define and implement class Employee. This class should contain the following fields: first name, last name, employee id, hourly pay. This class should contain getters and setters for all its attributes. This class also needs at least one constructor. Implement method computePay() in this class. This method should accept an integer number of hours the employee worked as an input argument and return a floating point value indicating the pay the employee earned. If the number of hours is invalid (e.g. a negative number) this method should throw NumberFormatException. If the number of hours is over 40 then this method should throw a custom exception named TooManyHoursWorkedException. Remember that you will have to define your own exception class for this. Save this class and its definition into a file named Employee.java. Define and implement class EmployeeTest.This class should implement main() method. In the body of the main() method you should create an instance of Employee with the…arrow_forwardIn previous chapters, you have created programs for the Greenville Idol competition. Now create a Contestant class with the following characteristics: The Contestant class contains public static arrays that hold talent codes and descriptions. Recall that the talent categories are Singing Dancing, Musical instrument, and Other. The class contains an auto-implemented property that holds a contestants name. The class contains fields for a talent code and description. The set accessor for the code assigns a code only if it is valid. Otherwise, it assigns I for Invalid. The talent description is a read-only property that is assigned a value when the code is set. Modify the GreenvilleRevenue program so that it uses the Contestant class and performs the following tasks: The program prompts the user for the number of contestants in this years competition; the number must be between 0 and 30. The program continues to prompt the user until a valid value is entered. The expected revenue is calculated and displayed. The revenue is $25 per contestant. The program prompts the user for names and talent codes for each contestant entered. Along with the prompt for a talent code, display a list of the valid categories. After data entry is complete, the program displays the valid talent categories and then continuously prompts the user for talent codes and displays the names of all contestants in the category. Appropriate messages are displayed if the entered code is not a character or a valid code.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
Programming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:Cengage
Systems ArchitectureComputer ScienceISBN:9781305080195Author:Stephen D. BurdPublisher:Cengage Learning
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage
Systems Architecture
Computer Science
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Cengage Learning
Introduction to Classes and Objects - Part 1 (Data Structures & Algorithms #3); Author: CS Dojo;https://www.youtube.com/watch?v=8yjkWGRlUmY;License: Standard YouTube License, CC-BY