More Tasks

Task 7.7.1

In this task, you will create a program that computes these statistics for a numeric dataset:

• Minimum
• Maximum
• Mean (‘average’)
• Median

1. Edit the file named Stats.kt, in the tasks/task7_7_1 subdirectory of your repository.

   In this file, write a function that prompts the user to enter a series of floating-point values, storing them in a list. The function should return the list.

   Kotlin’s buildList() provides an elegant way of implementing this:

   fun readData() = buildList {
       // Print a prompt for the user
   
       // Write a loop to read the numbers
       // Inside this loop, call add() to add a number to list
   }
   

   Your program will need to cope with varying amounts of data, so you should have some way of terminating the input when the user has finished entering values.

2. Write a second function that computes the median of a list of floating-point values.

3. Write a third function that displays the required statistics for a list of floating-point values. Obviously, this should make use of the function you created in the previous step. The other statistics can each be computed using a single line of code.

4. Finally, write a two-line main() function that uses the previously written functions to read the data and display the required statistics.

Task 7.7.2

Edit the file named Contacts.kt, in the tasks/task7_7_2 subdirectory of your repository.

In this file, write a Kotlin program to simulate a database of contacts and their telephone numbers. Use a map of strings onto strings to represent this database.

Your program should repeatedly prompt the user to enter a contact’s name. If the name is present in the map, the program should display the corresponding phone number; otherwise, it should prompt for entry of that person’s phone number and then store the pairing of name and number in the map.