Starting Out with C++ from Control Structures to Objects (9th Edition)
9th Edition
ISBN: 9780134443850
Author: GADDIS
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 3, Problem 20PC
Pizza Pi
Joe’s Pizza Palace needs a
A) Ask the user for the diameter of the pizza in inches.
B) Calculate the number of slices that may be taken from a pizza of that size.
A) Display a message telling the number of slices.
To calculate the number of slices that may be taken from the pizza, you must know the following facts:
• Each slice should have an area of 14.125 inches.
• To calculate the number of slices, simply divide the area of the pizza by 14.125.
• The area of the pizza is calculated with this formula:
Area = πr2
NOTE: π is the Greek letter pi. 3.14159 can be used as its value. The variable r is the radius of the pizza. Divide the diameter by 2 to get the radius.
Make sure the output of the program displays the number of slices in fixed-point notation, rounded to one decimal place of precision. Use a named constant for pi.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Party-On sells individual hot/cold cups and dessert plates for parties. SueChen wants a program that allows her to enter the price of a cup, the price of a plate, the number of cups purchased, and the number of plates purchased. The program should then calculate the total cost of the purchase, including the sales tax. Finally, the program should display the total cost on the screen. Desk-check your solution’s algorithm using $0.50 as the cup price, $1 as the plate price, 35 as the number of cups, 35 as the number of plates, and 2% as the tax rate. Then desk-check it using $0.25, $0.75, 20, 10, and 6%.
(Geometry: great circle distance) The great circle distance is the distance between two points on the surface of a sphere. Let (x1, y1) and (x2, y2) be the geographi- cal latitude and longitude of two points. The great circle distance between the two points can be computed using the following formula: d = radius * arccos(sin(x1) * sin(x2) + cos(x1) * cos(x2) * cos(y1 - y2)) Write a program that prompts the user to enter the latitude and longitude of two points on the earth in degrees and displays its great circle distance. The average earth radius is 6,378.1 km. The latitude and longitude degrees in the formula are for north and west. Use negative to indicate south and east degrees.
Scientists measure an object's mass in kilograms and its weight in Newtons. If you know the amount of mass of an object, you can calculate it's weight in Newtons with the following formula:
Design a program that asks the user to enter an object's mass, and then calculates its weight. If the object weighs more than 1,000 Newtons, display a message indicating that it is too heavy. If the object weighs less than 10 Newtons, display a message indicating that it is too light.
Show in Python and in Flowchart!!!!
Chapter 3 Solutions
Starting Out with C++ from Control Structures to Objects (9th Edition)
Ch. 3.1 - Prob. 3.1CPCh. 3.1 - Prob. 3.2CPCh. 3.1 - Assume value is an integer variable. If the user...Ch. 3.1 - A program has the following variable definitions....Ch. 3.1 - Prob. 3.5CPCh. 3.1 - Complete the following program skeleton so it asks...Ch. 3.2 - Complete the table below by determining the value...Ch. 3.2 - Write C++ expressions for the following algebraic...Ch. 3.2 - Prob. 3.9CPCh. 3.2 - Complete the following program skeleton so it...
Ch. 3.5 - Assume the following variable definitions: int a =...Ch. 3.5 - Complete the following program skeleton so it asks...Ch. 3.5 - Prob. 3.13CPCh. 3.6 - Write a multiple assignment statement that assigns...Ch. 3.6 - Write statements using combined assignment...Ch. 3.6 - Prob. 3.16CPCh. 3.7 - Write cout statements with stream manipulators...Ch. 3.7 - Prob. 3.18CPCh. 3.7 - The following program skeleton asks for an angle...Ch. 3.9 - Prob. 3.20CPCh. 3.9 - Assume the variables angle1 and angle2 hold angles...Ch. 3.9 - To find the cube root (the third root) of a...Ch. 3.9 - The cosecant of the angle a is 1sina Write a...Ch. 3 - Assume the following variables are defined: int...Ch. 3 - Prob. 2RQECh. 3 - Prob. 3RQECh. 3 - Complete the following table by determining the...Ch. 3 - Write C++ expressions for the following algebraic...Ch. 3 - Assume a program has the following variable...Ch. 3 - Assume a program has the following variable...Ch. 3 - Assume qty and salesReps are both integers. Use a...Ch. 3 - Rewrite the following variable definition so that...Ch. 3 - Complete the following table by providing...Ch. 3 - Write a multiple assignment statement that can be...Ch. 3 - Write a cout statement so the variable divSales is...Ch. 3 - Write a cout statement so the variable totalAge is...Ch. 3 - Prob. 14RQECh. 3 - The__________ library function returns the cosine...Ch. 3 - The ___________ library function returns the sine...Ch. 3 - The ________ library function returns the tangent...Ch. 3 - The __________ library function returns the...Ch. 3 - The _________ library functionreturns the...Ch. 3 - The _________ library function returns the natural...Ch. 3 - Prob. 21RQECh. 3 - The _______ library function returns the value of...Ch. 3 - The _________ libraryfunction returns the square...Ch. 3 - The ________ file must beincluded in aprogramthat...Ch. 3 - A retail store grants its customers a maximum...Ch. 3 - Write a pseudocode algorithm for a program that...Ch. 3 - Write a pseudocode algorithm for a program that...Ch. 3 - using namespace std; int main () { double number1,...Ch. 3 - #include iostream using namespace std; int main()...Ch. 3 - #include iostream; using namespace std; int main()...Ch. 3 - #include iostream; using namespace std; main { int...Ch. 3 - #inc1ude iostream; using namespace std; main {...Ch. 3 - #inc1ude iostream; using namespace std; int main()...Ch. 3 - What will each of the following programs display?...Ch. 3 - #include iostream using namespace std; int main()...Ch. 3 - (Assume the user enters George Washington.)...Ch. 3 - (Assume the user enters 36720152. Use a...Ch. 3 - Miles per Gallon Write a program that calculates a...Ch. 3 - Stadium Seating There are three seating categories...Ch. 3 - Test Average Write a program that asks for five...Ch. 3 - Average Rainfall Write a program that calculates...Ch. 3 - Male and Female Percentages Write a program that...Ch. 3 - Ingredient Adjuster A cookie recipe calls for the...Ch. 3 - Box Office A movie theater only keeps a percentage...Ch. 3 - How Many Widgets? The Yukon Widget Company...Ch. 3 - How Many Calories? A bag of cookies holds 30...Ch. 3 - How Much Insurance? Many financial experts advise...Ch. 3 - Automobile Costs Write a program that asks the...Ch. 3 - Celsius to Fahrenheit Write a program that...Ch. 3 - Currency Write a program that will convert U.S....Ch. 3 - Monthly Sales Tax A retail company must file a...Ch. 3 - Property Tax A county collects property taxes on...Ch. 3 - Senior Citizen Property Tax Madison County...Ch. 3 - Math Tutor Write a program that can be used as a...Ch. 3 - Interest Earned Assuming there are no deposits...Ch. 3 - Monthly Payments The monthly payment on a loan may...Ch. 3 - Pizza Pi Joes Pizza Palace needs a program to...Ch. 3 - How Many Pizzas? Modify the program you wrote in...Ch. 3 - Angle Calculator Write a program that asks the...Ch. 3 - Stock Transaction Program Last month Joe purchased...Ch. 3 - Planting Grapevines A vineyard owner is planting...Ch. 3 - Word Game Write a program that plays a word game...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Before GUIs became popular, the _____ interface was the most commonly used. a. command line b. remote terminal ...
Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
Why is the study of database technology important?
Database Concepts (7th Edition)
_____ is the only language computers can process directly, without any conversion required.
Starting Out With Visual Basic (8th Edition)
Write Java statements that will cause the following to be written to the screen: Once upon a time, there were t...
Java: An Introduction to Problem Solving and Programming (8th Edition)
What are the advantages in implementing a language with a pure interpreter?
Concepts of Programming Languages (11th Edition)
What do you call a program that runs Java byte-code instructions?
Absolute Java (6th Edition)
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
- Assuming there are no deposits other than the original investment, the balance in a saving account after one year may be calculated as Amount=Principal * (1+ Rate / T)T principal -balance in the saving account, Rate -the interest rate, T - number of times the interest is compounded during a year. Write a program that asks for : the principal, the interest rate, and the number of times the interest is compounded. It should display a report similar to Interest Rate: 4.25% Times Compounded: 12 Principal: $ 1000.00 Interest: $ 43.34 Amount in Savings: $ 1043.34arrow_forwardsoftware sales a software company sells a package that retails for $99. quantity discounts are given according to the following table: quantity discount 10-19 10% 20-49 20% 50-99 30% 100 or more 40% write a program that asks the user to enter the number of packages purchased. the program should then display the amount of the discount (if any) and the total amount of the purchase after the discount.arrow_forwardLULU Shopping wants to calculate the Commission given their employee. The program should ask the user to the number of items, and the unit amount. The sales bill is computed by multiplying the number of items and the unit amount A commission is computed based on the Sales as shown in the table below: sales bill commission 1 – 150 10% of the sales bill More than 150 18% of the sales bill Display the Sales bill and the commission. (Python)arrow_forward
- Widgets and Gizmos An online retailer sells two products: widgets and gizmos. Each widget weighs 75 grams. Each gizmo weighs 112 grams. Write a program that reads the number of widgets and the number of gizmos in an order from the user. Then your program should compute and display the total weight of the order.arrow_forwardFat Gram Calculator Design a program that asks for the number of fat grams and calories in a food item. Validate the input as follows: Make sure the number of fat grams and calories is not less than 0. According to nutritional formulas, the number of calories cannot exceed fat grams x 9. Make sure that the number of calories entered is not greater than fat grams x 9. Once corrected data has been entered, the program should calculate and display the percentage of calories that come from fat. Use the following formula: Percentage of calories from fat = (Fat grams x 9) / calories ANSWER IN PSEUDOCODE USE ONLY WHILE LOOPS DO NOT USE MODULES/FUNCTIONSarrow_forwardFat Gram Calculator Design a program that asks for the number of fat grams and calories in a food item. Validate the input as follows: Make sure the number of fat grams and calories is not less than 0. According to nutritional formulas, the number of calories cannot exceed fat grams x 9. Make sure that the number of calories entered is not greater than fat grams x 9. Once corrected data has been entered, the program should calculate and display the percentage of calories that come from fat. Use the following formula: Percentage of calories from fat = (Fat grams x 9) / calories ANSWER IN PSEUDOCODEarrow_forward
- True or False In code, true and false must be lowercase.arrow_forward(Geometry: distance of two points) Write a program that prompts the user to enter two points (x1, y1) and (x2, y2) and displays their distance between them. The formula for computing the distance is: Square root of ((x2 - x1) squared + (y2 - y1) squared) Note that you can use pow(a, 0.5) to compute square root of a. Sample Run Enter x1 and y1: 1.5 -3.4 Enter x2 and y2: 4 5 The distance between the two points is 8.764131445842194arrow_forwardFinancial application: calculate tips) Write a program that reads the subtotal and the gratuity rate, then computes the gratuity and total. For example, if the user enters 10 for subtotal and 15% for gratuity rate, the program displays $1.5 as gratuity and $11.5 as total. please take screenshots of the stops.arrow_forward
- Summary During each summer, John and Jessica grow vegetables in their backyard and buy seeds and fertilizer from a local nursery. The nursery carries different types of vegetable fertilizers in various bag sizes. When buying a particular fertilizer, they want to know the price of the fertilizer per pound and the cost of fertilizing per square foot. Instructions The following program prompts the user to enter the size of the fertilizer bag, in pounds, the cost of the bag, and the area, in square feet, that can be covered by the bag. The program should output the desired result. However, the program contains logic errors. Find and correct the logic errors so that the program works properly. //Logic errors.#include <iostream>#include <iomanip> using namespace std; int main(){ double cost; double area; double bagSize; cout << fixed << showpoint << setprecision(2); cout << "Enter the amount of fertilizer, in pounds, " <<…arrow_forwardSummary During each summer, John and Jessica grow vegetables in their backyard and buy seeds and fertilizer from a local nursery. The nursery carries different types of vegetable fertilizers in various bag sizes. When buying a particular fertilizer, they want to know the price of the fertilizer per pound and the cost of fertilizing per square foot. Instructions The following program prompts the user to enter the size of the fertilizer bag, in pounds, the cost of the bag, and the area, in square feet, that can be covered by the bag. The program should output the desired result. However, the program contains logic errors. Find and correct the logic errors so that the program works properly. //Logic errors.#include <iostream>#include <iomanip> using namespace std; int main(){ double cost; double area; double bagSize; cout << fixed << showpoint << setprecision(2); cout << "Enter the amount of fertilizer, in pounds, " <<…arrow_forwardMiles per Gallon A car holds 15 gallons of gasoline and can travel 375 miles before refueling. Write a program that calculates the number of miles per gallon (MPG) the car gets. Display the result on the screen.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage Learning
C++ Programming: From Problem Analysis to Program...
Computer Science
ISBN:9781337102087
Author:D. S. Malik
Publisher:Cengage Learning
Python Tutorial #10; Math Functions in Python; Author: Art of Engineer;https://www.youtube.com/watch?v=OviXsGf4qmY;License: Standard YouTube License, CC-BY