Convert to JavaScript

Java Conversion/Assignment 2/Assignment 2.docx

Jacqui wants you to enter the daily totals for each employee in a pro-

gram that computes and determines the following statistics:

• Total coupon purchases attributed to each employee

• Name of the employee with the highest coupon purchase total

• Total coupon purchases for all employees

The promotion might be repeated, so she doesn’t want you to lock in

the number of employees. However, you can specify that it’s a five-

day promotion. Here are some guidelines for your program:

• You don’t need to retain every daily amount; just add it to the total

for an employee. You need to set each employee’s total to 0 before

entering the daily amounts.

• You don’t need to retain every employee’s name, just the one with

the highest total.

• You need an outer loop for employees and an inner loop for the

five days of the promotion.

• You don’t know the number of employees, so use a sentinel value

for the outer loop. Remember that you need a priming prompt

and a prompt at the end of the loop. In addition, you need to ask

for the employee’s name before the daily amounts, so the sentinel

should be a string value that can’t be confused with a name. Q for

“quit” will work.

• You know the number of iterations for the inner loop, so a For loop

is suitable.

Discussion: First, you create your algorithm in pseudocode, and then

convert it to JavaScript and test it. Start with the IPO method:

• What outputs are requested?

• Total coupon purchases attributed to each employee (numeric):

empTot

• Name of the employee with the highest sales (string): maxName

• Total coupon sales for all employees (numeric): grandTot

• What inputs do you have available?

• Employee name (string): empName

• Daily coupon sales amounts (numeric): dailyAmt

• What processing is required?

• Add daily amounts to total for each employee.

• After each employee’s five amounts have been entered, display

the employee’s name and total.

• Keep track of the highest total by any employee (numeric):

maxTot. To do this, initialize a variable for the maximum to 0,

compare any new value with it, and replace the variable’s value

with the new value if it’s higher.

• If the employee’s total is the highest so far, retain this amount

and the employee’s name.

• After the numbers for all employees have been entered, display

the grand total and the name of the employee with the highest

total.

1. Open a new document in Notepad, and save it as

frozenRainbowPromotion.txt. Your pseudocode should look

something like the following:

// Program name: Frozen Rainbow Promotion

// Purpose: Compute stats for coupon purchases

// attributed to employees for a 5-day period

// Author: Paul Addison

// Date last modifi ed: 01-Sep-2011

Start

// Declare variables

Declare String empName

// employee name

Declare String maxName

// employee with high total

Declare Numeric dailyAmt

// daily employee amounts

Declare Numeric empTot

// total employee purchases

Declare Numeric maxTot = 0

// highest employee total

Declare Numeric grandTot = 0

// total of all purchases

Declare Numeric dayIndex

// loop index for weekdays

// Display program header,

// prompt for fi rst employee name

Display "Frozen Rainbow Promotion Program"

Display "Enter employee's name or Q to quit: "

Input empName

// Start the outer loop,

// and set employee's total to 0

While empName != "Q"

empTot = 0

// Start the inner loop,

// prompt for daily amounts

// Add each daily amount to total

For dayIndex = 1 to 5

Display "Enter the amount for day: " +

dayIndex

Input dailyAmt

empTot = empTot + dailyAmt

End For

// Display employee's name and total

// Compare total with max total

// If higher,

// replace max total and employee's name

// Add total to grand total

Display empName + ": total is " + empTot

If empTot > maxTot Then

maxTot = empTot

maxName = empName

End If

grandTot = grandTot + empTot

// Prompt for next employee's name, end loop

Display "Enter employee's name or Q to quit: "

Input empName

End While

// Display grand total and display

// name and amount of highest employee

Display "Grand total of coupon purchases: "

+ grandTot

Display "Employee with highest amount: "

+ maxName

Display "Highest amount: " + maxTot

// Thank the user and exit the program

Display "Frozen Rainbow thanks you!"

Stop

2. Now convert the pseudocode to JavaScript. Save the file as

frozenRainbowPromotion.html, and open it in a browser.

Enter the following data:

• First employee: Mandy Lifeboats. Daily amounts: 15, 19,

22, 10, 20

• Second employee: Saul Teasnacks. Daily amounts: 17, 12,

28, 15, 19

• For the third employee, enter Q to quit the program. Your

output should look similar to Figure 6-5. If your program

doesn’t produce the correct output, compare it with frozen-

RainbowPromotion-solution.html in your student data files.

In this Programmer’s Workshop, you have used a loop to accumulate

amounts and determined the maximum amount by comparing each

total with the current maximum. In the Object Lesson, you learn the

difference between variables that each object gets and variables that

occur only once for the class.