[Dev-C++] student needs a little help

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Hello Everyone,
I'm currently a CS Student and need a little help. I have been given the enclosed programming assignment but I'm not sure how to do it. It seems like a simple problem to solve but I don't know how to do list let and from the looks of the problem it will need one. I guess the teacher things we are supposed to know how to do list already.
Anyhow, I'd like a few pointers on how to do this problem if possible. Maybe how to do the part of the code where it would require a list and search.
Any help is appreciated, thanks.
Marton 
Program #2:&nbsp;&nbsp; Grocery Store Checkout&nbsp;&nbsp;&nbsp; (60 points)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>
<o:p>&nbsp;</o:p>
Your assignment is to write, run, and test a C++ program, pg2, to simulate the operation of a<o:p></o:p>
grocery store checkout system. Your program should first build a data structure to contain<o:p></o:p>
information on all the products available in the store. Then the program should print the cash <o:p></o:p>
register receipt for each customer. 
<o:p>&nbsp;</o:p>
INPUT<o:p></o:p>
The input for pg2 has two sources: the inventory information is input from a text file, <o:p></o:p>
and the customer transactions are input from the keyboard.<o:p></o:p>
<o:p>&nbsp;</o:p>
1. The information about each product carried by the store is listed on a single line in the<o:p></o:p>
&nbsp;&nbsp;&nbsp; inventory file invent.dat", in the following format:<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;product number&gt; &lt;description&gt; &lt;price&gt; &lt;tax&gt;<o:p></o:p>
&nbsp;&nbsp;&nbsp; where &lt;product number&gt; is a five-digit positive (nonzero) integer, &lt;description&gt; is a string of <o:p></o:p>
&nbsp;&nbsp;&nbsp; at most 12 characters with no embedded blanks, &lt;price&gt; is a real number, and &lt;tax&gt; is a <o:p></o:p>
&nbsp;&nbsp;&nbsp; character ('T' if the product is taxable; 'N' if it is not taxable). The data in the inventory file is <o:p></o:p>
&nbsp;&nbsp;&nbsp; ordered from smallest to largest product number.<o:p></o:p>
<o:p>&nbsp;</o:p>
2. The customer transactions are input from the keyboard, in the following format:<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &lt;product number&gt; &lt;times&gt;<o:p></o:p>
&nbsp;&nbsp;&nbsp; where &lt;product number&gt; is as described above, and &lt;times&gt; is an integer in the range 1 to 100, <o:p></o:p>
&nbsp;&nbsp;&nbsp; indicating the quantity of this product desired. A zero input for &lt;product number&gt; indicates the <o:p></o:p>
&nbsp;&nbsp;&nbsp; end of the customer's order. (The store will soon be using a scanner to input the product number, <o:p></o:p>
&nbsp;&nbsp;&nbsp; but for now it is typed in by the cashier.) <o:p></o:p>
<o:p>&nbsp;</o:p>
OUTPUT<o:p></o:p>
<o:p>&nbsp;</o:p>
The program outputs should be written to a text file called receipts.out", which can be printed<o:p></o:p>
out for purposes of determining your grade. <o:p></o:p>
<o:p>&nbsp;</o:p>
1. The inventory information of invent.dat is echo printed to the output file. <o:p></o:p>
<o:p>&nbsp;</o:p>
2. The cash register receipt for each customer is written to the output file. The receipts should be <o:p></o:p>
&nbsp;&nbsp;&nbsp; nicely formatted, with the product description (not the product number), number of items, item <o:p></o:p>
&nbsp;&nbsp;&nbsp; price, and total price for each product printed on a single line. At the end of each customer's <o:p></o:p>
&nbsp;&nbsp;&nbsp; order, the subtotal for all items, amount of tax on taxable items, and total bill should be printed, <o:p></o:p>
&nbsp;&nbsp;&nbsp; clearly labeled. (The tax rate is 7.5% for taxable items.) <o:p></o:p>
<o:p>&nbsp;</o:p>
PROCESSING<o:p></o:p>
<o:p>&nbsp;</o:p>
pg2 first reads in all of the inventory information from file invent.dat, echo printing the <o:p></o:p>
information to the output file receipts.out. The program then prompts the cashier to begin inputting <o:p></o:p>
the order for the first customer. This customer's order is processed, and the receipt is printed to the <o:p></o:p>
output file.<o:p></o:p>
After each customer's order is processed, the program should ask the cashier if another customer is <o:p></o:p>
to be processed. If the answer is 'Y', the program sets up to process the next customer; if the answer <o:p></o:p>
is 'N', the program terminates with a friendly message. 
<o:p>&nbsp;</o:p>
ERROR CHECKING<o:p></o:p>
<o:p>&nbsp;</o:p>
The following input errors are possible and should be handled by pg2<o:p></o:p>
<o:p>&nbsp;</o:p>
1. Duplicate &lt;product number&gt; in inventory file. Write an error message to the output file and skip <o:p></o:p>
&nbsp;&nbsp;&nbsp; the second entry. <o:p></o:p>
2. &lt;Product number&gt; not in inventory file. Write an error message on the receipt, ignore that product <o:p></o:p>
&nbsp;&nbsp;&nbsp; number, and continue with the next item. <o:p></o:p>
3. &lt;Times&gt; not in the specified range. Write an error message to the output file, ignore that line, and <o:p></o:p>
&nbsp;&nbsp;&nbsp; continue with the next item. <o:p></o:p>
<o:p>&nbsp;</o:p>
EXAMPLE<o:p></o:p>
&nbsp;
&nbsp;<?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:stroke joinstyle="miter"></v:stroke><v:path o:connecttype="rect" gradientshapeok="t"></v:path><v:shape id=_x0000_s1028 style="MARGIN-TOP: 0.05pt; Z-INDEX: 1; MARGIN-LEFT: 0px; WIDTH: 477.9pt; POSITION: absolute; HEIGHT: 321.45pt; mso-wrap-style: none; v-text-anchor: top-baseline" type="#_x0000_t202" stroked="f" filled="f" fillcolor="#0c9"><v:textbox style="mso-fit-shape-to-text: t"></v:textbox></v:shape>
<TABLE cellSpacing=0 cellPadding=0 width="100%">
<TBODY>
<TR>
<TD style="BORDER-RIGHT: #ece9d8; BORDER-TOP: #ece9d8; BORDER-LEFT: #ece9d8; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent">
<DIV class=shape style="PADDING-RIGHT: 7.2pt; PADDING-LEFT: 7.2pt; PADDING-BOTTOM: 3.6pt; PADDING-TOP: 3.6pt" v:shape="_x0000_s1028">
&nbsp;&nbsp; From File "Invent.in":<o:p></o:p>
&nbsp;&nbsp; &nbsp; 11012 &nbsp;&nbsp;&nbsp; gallon-milk&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 1.99 &nbsp;&nbsp;&nbsp;&nbsp; N<o:p></o:p>
&nbsp;&nbsp; &nbsp; 11014&nbsp;&nbsp; &nbsp; butter&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; 2.59&nbsp; &nbsp;&nbsp;&nbsp; N<o:p></o:p>
&nbsp;&nbsp; &nbsp; 11110&nbsp;&nbsp; &nbsp; pie-shells&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; 0.99 &nbsp;&nbsp;&nbsp;&nbsp; N<o:p></o:p>
&nbsp;&nbsp; &nbsp; 20115&nbsp;&nbsp;&nbsp;&nbsp; laundry-soap&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 3.60 &nbsp;&nbsp;&nbsp;&nbsp; T<o:p></o:p>
&nbsp;&nbsp; &nbsp; 30005&nbsp;&nbsp; &nbsp; homestyle-br&nbsp;&nbsp; 0.99 &nbsp;&nbsp;&nbsp; N<o:p></o:p>
&nbsp;&nbsp; From keyboard (one customer):<o:p></o:p>
&nbsp;&nbsp; &nbsp; 11110&nbsp; 2<o:p></o:p>
&nbsp; &nbsp;&nbsp; 40012&nbsp; 3<o:p></o:p>
&nbsp;&nbsp; &nbsp; 20115&nbsp; 1<o:p></o:p>
&nbsp;&nbsp; &nbsp; 0<o:p></o:p>
&nbsp;<o:p></o:p>
&nbsp;&nbsp; To "Receipts.out" file:<o:p></o:p>
---------------------------------------------------------<o:p></o:p>
<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:date Month="9" Day="10" Year="1998">SEP 10, 1998</st1:date> <st1:time Hour="18" Minute="0">6:00 pm</st1:time> (* date and time optional *)<o:p></o:p>
Customer 1<o:p></o:p>
pie-shells&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp; @&nbsp; 0.99&nbsp; 1.98<o:p></o:p>
*** item 40012 not in inventory ***<o:p></o:p>
laundry-soap&nbsp; 1&nbsp; @&nbsp; 3.60&nbsp; 3.60 TX<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp; Subtotal&nbsp; 5.58<o:p></o:p>
&nbsp;&nbsp;&nbsp;&nbsp; Tax&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0.27<o:p></o:p>
&nbsp;<o:p></o:p>
&nbsp;&nbsp; &nbsp; Total&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5.85 <o:p></o:p></DIV></TD></TR></TBODY></TABLE>
<o:p>&nbsp;</o:p>
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DATA STRUCTURE<o:p></o:p>
<o:p>&nbsp;</o:p>
The inventory information can be stored in a list of product records. Assume that the maximum <o:p></o:p>
number of products is 50, for purposes of writing this program. As the data in the inventory file <o:p></o:p>
is ordered from smallest to largest product number, it is very simple to insert the product records <o:p></o:p>
into this data structure in order. You can use either a sequential or binary search to locate a product <o:p></o:p>
number in the inventory.<o:p></o:p>
You should specify this data structure as an ADT, as described in the chapter; define and implement <o:p></o:p>
a set of operations to encapsulate it. <o:p></o:p>
<o:p>&nbsp;</o:p>
<o:p>&nbsp;</o:p>
TEST PLAN<o:p></o:p>
<o:p>&nbsp;</o:p>
Be sure to include test cases to test your error conditions in your test plan. <o:p></o:p>
<o:p>&nbsp;</o:p>
DELIVERABLES<o:p></o:p>
<o:p>&nbsp;</o:p>
1. A disk of the source code of the program pg2 and all included files. <o:p></o:p>
2. Hard copy of a listing of your implemented test plan.<o:p></o:p>
3. Hard copy of the output file, receipts.out", produced by running your program using the input <o:p></o:p>
&nbsp;&nbsp;&nbsp; specified in your test plan.<o:p></o:p>
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[Dev-C++] student needs a little help

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[Dev-C++] student needs a little help