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:

An invoice header with number of items on the invoice and the date of the invoice

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

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

3 2/12/2017

134276 Framis-R 8 7.35

125790 Framis-L 12 15.76

100086 Aglet 395 0.11 2 1/23/2017

135876 Wrench 12 22.50

543287 Henway 4 19.25

The above indicates that there are three items on the first invoice and its date is 2/12/2017, the first item has an item code of 134276 is a Framis-R an order quantity of 8 and a unit price of $7.35. 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:

Erie Industrial Supply Corporation

Invoice date: 1/15/2017

134246 Framis-R 8 7.35 58.80

125790 Framis-L 12 15.76 189.12

100086 Aglet 395 0.11 43.45

Total ................291.37

Invoice date: 1/23/2017

135876 Wrench 12 22.50 270.00

543287 Henway 4 19.25 77.00

Total ...............347.00

The functions shall 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 : printLine

Operation : Writes a line of the invoice.

Description : Given the item reference number, the name, the

quantity, the unit price and total

price of an item, outputs a line of

the invoice.

Parameters : string itemno string name

int quantity

double unitCost

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

Function type : void

Function name : printInvoiceHeader

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 : printReportHeader

Operation : Writes Erie Industrial Supply Corporation as the first line of the file

Description : Displays the company name

Parameters : None --------------------------------------------------------------------------

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 in main.

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

printReportHeader()

while( fin >> items >> date)

totalCost = 0

printInvoiceHeader (date)

Use a for loop (i=0;i

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

End main read loop