4374 Homework(05) Selectioninc++ 1

Fundamentals of Programming  Homework Semester 1

HOMEWORK #5 (SELECTION IN C++) 5.

Implement in C++ the following PDL program (developed for Homework #4) that reads in a distance in miles, then calculates and displays the shipping cost. global

shippingDistance, variableShippingCost

produceShippingCost local totalShippingCost local const fixedShipmentCost = 50 output( "Enter the distance in miles: ") input( shippingDistance) if ( shippingDistance ≥ 0) then //calculate part of the cost that varies with the distance call calculateVariableCost //add fixed charge set totalShippingCost to (variableShippingCost + fixedShipmentCost) //display cost output( “The total shipment cost is: £”, totalShippingCost) else //when distance is negative //display error message output( “ERROR: Cannot calculate cost: invalid distance!”) endif proc calculateVariableCost //calculate part of the cost that varies with the distance if ( shippingDistance ≤ 100) then //distance ≤ 100 //£5 per mile set variableShippingCost to (5 * shippingDistance) else //distance > 100 if ( shippingDistance ≤ 500) then //distance > 100 and distance ≤ 500 //£5 for each of first 100 miles, £4 for remaining miles set variableShippingCost to ( (5 * 100) + (4 * (shippingDistance - 100)) ) else //distance > 500 //£5 for first 100 miles, £4 for next 400 miles, £3 for remaining distance set variableShippingCost to ( (5 * 100) + (4 * 400) + (3 * (shippingDistance - 500)) ) endif endif endproc Format the program's outputs so that it shows the cost in the usual currency format, e.g.,

Enter the distance in miles:: 520.5 The total shipment cost is: £2211.50

25471259.doc, 25/11/09

Module 4374, Homework1

Fundamentals of Programming  Homework Semester 1

For this exercise, you should:

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Use C++ facilities for implementing selection (if .. else) sequences & functions (NO need for repetition).

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Keep the structure of the PDL algorithm given in your C++ program (same procedures, same order, same logic).

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Use the global and local variables/constants declared.

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Use the identifiers given in PDL for the variables & functions in your C++ program.

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Put comments (between the two // up to the end of the line or between /* and */) to give information about your program, the functions & variables it used so as to make your solution easier to understand.

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Format your program's outputs as specified (see solution to Homework #3).

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Test your program with the various distances (e.g., try, at least -10, 0, 50, 100, 200, 500, 520 and also 10.5).

You do not have to check the validity of the type of the input (i.e. you can assume that the user will only enter a number for the distance). Look at section 3.4 in the C++ notes & refer to tutorial sheet # 4 to find out how to format the output for currency (£ sign and numbers representing pounds and pence).

25471259.doc, 25/11/09

Module 4374, Homework2