// MR HIGHAM'S DISTANCE CONVERSION PROGRAM - USING PROCEDURES

// 1. CONVERT THIS PROGRAM SO THAT IT USES FUNCTIONS TO RETURN A VALUE BACK TO VARIABLE ANSWER

// 2. ALTER THE PROGRAM SO THAT EACH FUNCTION IS PASSED A PARAMETER HOLDING THE DISTANCE TO BE CONVERTED INTO THE CORRECT UNIT

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using System;

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    public class Program

    {

        public static void Main()

        {

            int[] sales = new int[5];

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            bool loopConditioner = true;

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            while (loopConditioner == true) {

                Console.WriteLine("Enter year number: ");

                string yearString = Console.ReadLine();

                int yearIndex = Convert.ToInt16(yearString) - 1;

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                if (sales[yearIndex] == 0) {

                    Console.WriteLine("Enter Profit: ");

                    sales[yearIndex] = (int) Convert.ToInt64(Console.ReadLine());

                }

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                else {

                 Console.WriteLine(sales[yearIndex]);

                }

            }

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        }  

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   }

​