Parsing Command-Line Arguments Question

Level: Beginner

Focus: Command Line Arguments, Converting Strings to Numbers, For each loop, Error handling

Parsing Command-Line Arguments Question

Some applications accept command-line arguments as a way of configuring the application as it is being run. This exercise focuses on being able to read the arguments passed to an application and perform a task on those arguments.

Write a program that accepts the parameter "-addNumbers" as a command-line argument. The program will take all the arguments after the -addNumbers parameter, add them together and display the total to the user. The program must:

• display the message "No command-line arguments have been entered!" to the user when no command-line arguments are entered.
• be able to total numbers that include integers, real numbers and minus numbers.
• display a message "The arguments you have entered are not all numbers."
• ignore arguments entered in before the -addNumbers parameter.
• if the arguments can be totaled then this must be displayed to the user (i.e., "The total value of the arguments is: ").

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