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Grocery Store Checkout System in C using Files

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Please help with the following as it relates to the existing code (separate attachment)

Instead of getting the product names and prices from the standard input, enhance the program to read it from a file instead. Do not hard-code the filename within the program; ask the user to enter it instead. Also, enhance the program to support up to 100 product entries. Note that each line of input starts with a new field "product code", so define a new array to store the product codes as well. Within the checkout procedure's loop, instead of listing all the products and asking the user to select one by the index, ask the user to input a product code and search for it in the product code array to find the corresponding product. Please include comments throughout the code. Also, please provide a flowchart of the code. Thank you.
Example of what it should look like (User inputs in Red):
Grocery Checkout Program
Enter the input filename: data.txt
Input: 9516 1.99 Apples
Input: 9234 0.99 Oranges
Input: 9745 1.19 Tomatoes
Input: 4114 0.49 Bananas
Input: 2385 1.49 Peanuts
Input: 9145 0.49 Cucumbers
Input: 3498 8.99 Cherries
7 entries read.
C for Checkout, X to exit: C
Enter the product code or 0 to complete checkout: 1234
Invalid product code. Try again.
Enter the product code or 0 to complete checkout: 9745
Enter the weight: 10.5
Enter the product code or 0 to complete checkout: 3498
Enter the weight: 5.8
Enter the product code or 0 to complete checkout: 0
Total: $ 64.64
Discount: $ 3.23
Amount due: $ 61.41
C for Checkout, X to exit: C
Enter the product code or 0 to complete checkout: 9145
Enter the weight: 4.2
Enter the product code or 0 to complete checkout: 2385
Enter the weight: 5.2
Enter the product code or 0 to complete checkout: 4114
Enter the weight: 5.6
Enter the product code or 0 to complete checkout: 0
Amount due: $ 12.55
C for Checkout, X to exit: X
Thanks for using Checkout program.

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https://brainmass.com/computer-science/c/grocery-store-checkout-system-in-c-using-files-96303

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I have included the code as follows and also attached are the code and executable as compiled and linked by djgpp. In Brainmass we ...

Solution Summary

I have included the code as follows and also attached are the code and executable as compiled and linked by djgpp. In Brainmass we strive to help students with understanding the problem they are solving and give solutions with the hope that they can solve it and similar problems by themselves. Using the code, it is easy to create a flowchart on your own. Please note, flowchart should represent the logical flow of your program in process rectangles and decision diamond shapes with arrows pointing toward s the execution path.

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See Also This Related BrainMass Solution

T.J.'s small local grocery store

T.J.'s market is a small local grocery store with only one checkout counter. Assume that the shoppers arrive at the checkout lane at an average rate of 15 customers per hour and that the average order takes 3 minutes to ring up and bag.

a) If T.J. does not want the average time waiting for service to exceed 5 minutes, what would you tell T.J. about the current system? Is the current system working well?

b) One of the ways to meet this requirement is to improve the current service rate. But he does not know how much to do it. What would be the new service rate to meet his 5 minutes or less waiting time?

c) Another option is to hire a full-time person to assist in the checkout operation. T.J. believes that if the new employee assists the checkout cashier, average service time could be reduced to 2 minutes. Will this satisfy his goal of 5 minutes or less waiting time?

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