Lab 6B Coin Collection

Transcription

1 HNHS Computer Programming I / IPFW CS Bower - Page 1 Lab 6B Coin Collection You will create a program that allows users to enter the quantities of an assortment of coins (quarters, dimes, nickels, and pennies) and determine how much cash is in the collection. Users will also discover whether or not they have enough money to purchase a product. In this example, a stuffed panda bear has a purchase price of $ Objectives Implement Functions Use of ToolTip Handle multiple events with one event handler

2 HNHS Computer Programming I / IPFW CS Bower - Page 2 Requirements & Tips Comment your code (including functions)!!! Use text boxes to obtain a name and the amount of quarters, dimes, nickels, and pennies the user has. Determine what item the users will try to buy and what the purchase price will be. You will need two images one for when users can buy the item and another for when users cannot buy the item Place a picture box on the form. Its Image property will eventually equal the image returned by the DeterminePicture() function. Place a label on your form that will display a statement about whether or not the item can be purchased. The text property will eventually equal the String returned by the PurchaseSentence() function. End the program with an EXIT button. When users click the ADD COINS button... o Declare variables to hold the name of the user and the integer quantities of quarters, dimes, nickels, and pennies. o Declare a variable to hold the amount of money in the coin collection it will eventually equal the value returned by the AddTheCoins() function. o Declare a boolean variable to hold whether or not there is enough money to buy the item it will eventually equal the value returned by the IsThereEnoughMoney() function. o Make sure users have entered a name o Make sure users have entered numeric data in the textboxes (probably use Try Catch) and that the values are non-negative o Set your total cash variable equal to the AddTheCoins() function [it returns the cash value of the coin collection o Display the total amount of cash in a label o Set your boolean variable equal to the IsThereEnoughMoney() function [it returns whether or not (true/false) users have enough to purchase the item] o Set the text of your message label equal to the PurchaseSentence() function [it returns a statement about the user s ability to purchase the item] o Set the Image property of your picture box equal to the DeterminePicture() function [it returns an image of the item or something else]

3 HNHS Computer Programming I / IPFW CS Bower - Page 3 You will make an AddTheCoins() function that returns a Double. o It will have four Integer parameters - the number of quarters, the number of dimes, the number of nickels, and the number of pennies. o Remember that nickels have a value of o Calculate how much cash there is and return that amount You will make an IsThereEnoughMoney() function that returns a Boolean o It will have two Double parameters one for the cost of the item and one for the amount of money available to spend on the item o Determine whether or not there is enough money to pay for the item and return true or false You will make a PurchaseSentence() function that returns a String o It will have three parameters a Boolean indicating whether or not there is enough money to make the purchase, a String with the name of the user, and a String with the name of the item. o Create sentences for both situations (user can or can t make the purchase). Return the sentence. You will make a DeterminePicture() function that returns an Image o It will have one parameter a Boolean indicating whether or not there is enough money to make the purchase o Declare an Image variable at the start of the function o Set the variable equal to whatever image is appropriate (My.Resources.PandaBear00, for example) o Return that Image variable. When users click the RESET button... o All textboxes should clear, as well as answer labels and images. o The focus should be assigned to the first textbox. You will have one AnyTextChanged() sub that handles all five TextChanged events for the five text boxes o Answer labels and images should clear Tab order: Use a logical tab order (shouldn t hop all over your form!) Include keyboard access to the four buttons and tool tips for the buttons, textboxes and answer label. AcceptButton is AddCoins button; CancelButton is Exit button

4 HNHS Computer Programming I / IPFW CS Bower - Page 4 Use Tool Tips for the textboxes, buttons, and money answer label Type and modify the following at the top of the code: 'Your Name 'Date 'Assignment Name (Lab 6B Coin Collection, for example) 'Computer Programming I - Bower (or CS Bower if you want IPFW class) 'This program will... (describe the program)

5 HNHS Computer Programming I / IPFW CS Bower - Page 5 Sample Data (remember that the access key underscores only appear when users press ALT)

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7 HNHS Computer Programming I / IPFW CS Bower - Page 7 Grading Form design/ Naming standards 3 Runs properly 3 Comments/documentation included 3 Add Coins button 1 Reset button 1 Exit/End button 1 AddTheCoins function 3 IsThereEnoughMoney function 3 PurchaseSentence function 3 DeterminePicture function 3 AnyTextChanged sub 1 Accurate results 2 ToolTip 1 Run-time communication with user 2 (includes error messages) TOTAL 30