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  1. [10 pts] We would like you to self-test how much you retained from the lecture. Write the correct solution to the Mandatory Practice Problems. Debug your code until it runs correctly. Circle below how you wrote your code.
    1. (10 pts) I was able to write the code without referring to anything.
    2. (10 pts) I had to look at the notes, but still I was able to write the code without looking at the solution.
    3. (10 pts) I had to look at solutions to finish to code.
    4. (0 pts) I didn't do this.
    If you had to look at the solution, briefly describe what you missed but understand now.

  2. [90pts] Write a program hw.cpp that works as follows:

    1. It reads in a data file containing fruit name/price-per-pound pairs (e.g. fruit1.txt, fruit2.txt)
      Note: If the file can't be opened, the program should print the message File not found! and exit.
    2. It reads and executes the following commands:
      • add amount lbs name — which adds amount lbs of fruit name to the current order
        Note: if the name is not one of the ones read from the file, print the error message: Error! name not found!
      • price name — which prints the price of the fruit name formatted as in this example: blueberries are $1.59 per pound
        Note: if the name is not one of the ones read from the file, print the error message: Error! name not found!
      • checkout — which exits the program, printing out the total price of the order in the format: total is $num
    Assume the user always enters a valid command from the three above.

    Requirement: Use an array or arrays containing struct objects!

    Sample Runs
    ~/$ ./hw
Filename: fruit1.txt
command: add 3 lbs mango
command: price asdf
Error! asdf not found!
command: price peaches
Error! peaches not found!
command: price blueberries
blueberries are $1.59 per pound
command: add 2.1 lbs blueberries
command: checkout
total is $5.469

    ~/$ ./hw
Filename: fruit2.txt
command: add 2.0 lbs oranges
command: price kiwi
kiwi are $1.07 per pound
command: price starfruit
Error! starfruit not found!
command: add 1.5 lbs peas
Error! peas not found!
command: add 1.5 lbs plums
command: checkout
total is $2.505

    ~/$ ./hw
Filename: foobar.txt
File not found!

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