The wood-screw inventory

Problem description

Write a C program that keeps an inventory of different sizes of wood-screw. The sizes are 4, 6, 8, 10, and 12. Assume all the screws are the same length, and made from the same material. The program should start from a zero inventory and be able to accept input in the form of a screw size and an amount by which to increase or decrease (if negative) the holding of that size of screw. . The cost of each supply item is constant and is hard-coded in the program. At the end of the input, a list of screw sizes, their amounts and the total money worth of the inventory should be printed.

Procedure

Follow these steps to end up with a successful program:

1. Write a one sentence problem statement.
2. Write the problem description, as given above.
3. Do a TDSR analysis for tasks and subtasks. Draw the TDSR diagram that you get from this analysis.
4. Write a C program code from your analysis in 3.
5. Create a source file using the editor.
6. Compile the source code using gcc.
7. The program should create an "empty" inventory that can handle the screw sizes mentioned above, here with their unit cost:
   
   4 $0.30
   6 $0.35
   8 $0.45
   10 $0.50
   12 $0.65
   
8. Deliverables:
• your design document with its three sections: problem statement, problem description, TDSR diagram.
• your source code, suitably commented and with good layout
• the output produced by the program with the following input sequence (note the use of a special value as a sentinel -- see page 69). The first number is the size of screw, and the second is the inventory change.6 1000
  8 1500
  10 1200
  4 500
  12 100
  8 -255
  4 -62
  10 -720
  8 500
  4 100
  9999 0
• your source code e-mailed to the grader, login name salahmed.

Notes and hints

• the design needs to show that all the input is not done before processing starts. This is an example of a "loop" design where the top-level task is a loop of some sort. The output phase, is separate, however, and is done after all input and processing have been completed.
• prompt the user for input, mentioning especially the sentinel value.
• display screen output with reasonable layout, taking note of the display of money values. Use %10.2f as a format specifier
• use an array for the numbers of screws of each size. Index the array by applying a function to the screw size: e.g. screw size 4 goes in array element 0, size 6 goes in element 1 etc.
• when you are ready to produce the final output of the program, redirect the standard output produced by cout into a file by typing:
  a.out > outputfile
which you can then print on the lineprinter.
• mail your source code with:
  mail salahmed < filename.c

Due Date

Submit your completed assignment before 5pm. on Friday March 21st.