2023 Homework 2 Instructions Selection statements In this homework you will design a program to | Assignment Collections

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EXAMPLE FROM BOOK

3.6 Focus on Problem Solving:

A New Car Price Calculator

In each “Focus on Problem Solving” section throughout this textbook, we will develop a longer program that makes use of much of the material in the current chapter. The program developed here contains selection structures and menus to help compute the cost of a new car purchased with various options.

Problem Statement

Universal Motors makes cars. They compute the purchase price of their autos by taking the base price of the vehicle, adding in various costs of different options, and then adding shipping and dealer charges. The shipping and dealer charges are fixed for each vehicle at $500 and $175, respectively, but regardless of the particular model, and the buyer can select the following options: type of engine, type of interior trim, and type of radio. The various choices for each option and the associated prices are listed in Table 3.4.

Table 3.4 Options available for Universal Motors’ vehicles

Engine                                                             Purchase Code                                               Price

6 cylinder                                                                    S                                                          $150

8 cylinder                                                                    E                                                          $475

Diesel                                                                          D                                                          $750

Interior Trim                                                  Purchase Code                                               Price

Vinyl                                                                            V                                                          $50

Cloth                                                                            C                                                          $225   

Leather                                                                        L                                                          $800

Radio                                                              Purchase Code                                               Price

AM/FM/CD/DVD                                                         C                                                          $100

With GPS                                                                     P                                                          $400

Universal Motors would like to have a program that inputs the base price of a vehicle and the desired options from the user, and then displays the selling price of that vehicle.

Problem Analysis

This problem has very clearly defined input and output. The input consists of the base price (BasePrice), the engine choice (EngineChoice), the interior trim choice (TrimChoice), and the radio choice (RadioChoice). After the user has entered a choice for an option, the program must determine the corresponding cost of that option: EngineCost, TrimCost, and RadioCost.

The only item output is the selling price (SellingPrice) of the vehicle. To determine sellingprice, the program must also know the fixed value of the shipping and dealer charges (ShippingCharge and DealerCharge). Then the following computation is simple: SellingPrice = BasePrice + EngineCost + TrimCost + RadioCost + ShippingCharge + DealerCharge

Program Design

Roughly speaking, the following are the things our program must do:

1.       Input the base price

2.       Process the various option choices to compute additional costs

3.       Total all the costs

4.       Display the final selling price

We will input the base price in the main module and the transfer control to several submodules, one for each available option. Within each submodule, a menu will be displayed allowing the user to enter a choice for that option (See Table 3.4). Then the submodule will use this selection to determine the corresponding option cost. After all the option selections are made, another module will compute the total cost and display the results. Thus the Main module will contain the following submodules.

·         Compute_Engine_Cost

·         Compute_Interior_Trim_Cost

·         Compute_Radio_Cost

·         Display_Selling_Price

The hierarchy chart shown in Figure 3.8 shows the program modules and their relationship to one another. We now describe each of the modules in more detail.

Main Module

This module displays a welcome message, inputs the base price, and calls the other modules. In the Main module we also declare all the variables that will be used by more than one module. The pseudocode for the Main module follows: