CMPSC-121 Project #2

Write a C++ program to read details of invoices from a file and to output invoices which indicate the total cost of each item and the total cost of the invoice together with full details.

Details of an invoice are available as follows:

The number of items on the invoice, the date of the invoice

For each item, an item code (6 digits), a quantity and a unit cost.

Thus a typical set of lines in the file for invoices might be:

3 10/22/2014

161432 5 6.50

543289 10 2.25

876234 2 10.75

2 10/25/2014

135876 12 22.50

543287 4 19.25

The above indicates that there are three items on the first invoice and its date is 3/15/2014, the first item has an item code of 161432, an order quantity of 5 and a unit price of $6.50. There are two items on the next invoice, etc.

Write a C++ program to read the file (input.txt) with details of invoices and to output to a file an invoice which indicates the total cost of each item and the total cost of the invoice together with full details. The above details might produce a file as follows:

Invoice date: 10/22/2014

Item Quantity Unit Price Total Price

161432 5 6.50 32.50

543289 10 2.25 22.50

876234 2 10.75 21.50

Total 76.50

Invoice date: 10/25/2014

Item Quantity Unit Price Total Price

135876 12 22.50 270.00

543287 4 19.25 77.00

Total 347.00

The functions could be specified as follows:

Function type : double

Function name : calccost

Operation : Calculates the cost for a single item.

Description : Given the unit price of an item in

dollars and cents and the quantity of

the item, it calculates the total cost in

dollars and cents

Parameters : int quantity

double unitcost

Return : totalCost

--------------------------------------------------------------------------

Function type : double

Function name : acctotal

Operation : Accumulates the total cost of invoice

Description : Given current total invoice cost and

the total cost of an invoice item

calculates the new total invoice cost.

Parameters : double totalCost

double itemCost

Return : newTotalCost --------------------------------------------------------------------------

Function type : void

Function name : writeLine

Operation : Writes a line of the invoice.

Description : Given the item reference number, the

quantity, the unit price and total

price of an item, outputs a line of

the invoice.

Parameters : string itemno

int quantity

double unitCost

double totalCost --------------------------------------------------------------------------

Function type : void

Function name : printHeader

Operation : Writes Invoice date: and the date to the file

Description : Accepts the date and writes Invoice date: followed by the date into the file. Parameters : string date -------------------------------------------------------------------------- Function type : void

Function name : printTotal

Operation : Writes Total followed by the total and then an endl in the file.

Description : Accepts the total and writes it followed by a line of dots and then the invoice total and an endl date into the file. Parameters : double invoiceTotal

The pseudocode for main would be:

Open output file (Before main, create output file with the line: ofstream fout;

Create and open input file

Be sure to test to see if you can read the file. If not display a message and end the program.

Read number of items and date. Date can just be a string. This will be the main read loop which will end the program when it encounters end of file

while( fin >> items >> date)

totalCost = 0

printHeader (date)

Use a for loop (i=0;i

fin >> item >> quantity >> unitPrice totalcost = calcCost(quantity, unitPrice) invoiceCost = accTotal(invoiceCost, totalCost) writeLine(itemno, quantity, unitCost, totalCost) end for printTotal(invoiceCost)

End main read loop

Close input and output files

To submit this project for grading, upload the .cpp file only to the Project 2 dropbox.

See instructor for help as needed.