GreenvilleRevenue.cs

using System;
using static System.Console;
class GreenvilleRevenue
{
   static void Main()
   {
      const int ENTRANCE_FEE = 25;
      const int MIN_CONTESTANTS = 0;
      const int MAX_CONTESTANTS = 30;
      int numThisYear;
      int numLastYear;
      int revenue;
      string[] names = new string[MAX_CONTESTANTS];
      char[] talents = new char[MAX_CONTESTANTS];
      char[] talentCodes = {'S', 'D', 'M', 'O'};
      string[] talentCodesStrings = {"Singing", "Dancing", "Musical instrument", "Other"};
      int[] counts = {0, 0, 0, 0};;
      numLastYear = GetContestantNumber("last", MIN_CONTESTANTS, MAX_CONTESTANTS);
      numThisYear = GetContestantNumber("this", MIN_CONTESTANTS, MAX_CONTESTANTS);
      revenue = numThisYear * ENTRANCE_FEE;
      WriteLine("Last year's competition had {0} contestants, and this year's has {1} contestants",
         numLastYear, numThisYear);
      WriteLine("Revenue expected this year is {0}", revenue.ToString("C"));
      DisplayRelationship(numThisYear, numLastYear);
      GetContestantData(numThisYear, names, talents, talentCodes, talentCodesStrings, counts); 
      GetLists(numThisYear, talentCodes, talentCodesStrings, names, talents, counts);     
   }
  public static int GetContestantNumber(string when, int min, int max)
  {
      string entryString;
      int num;
      Write("Enter number of contestants {0} year >> ", when);
      entryString = ReadLine();
      num = Convert.ToInt32(entryString);
      while(num < min || num > max)
      {
         WriteLine("Number must be between {0} and {1}", min, max);
         Write("Enter number of contestants {0} year >> ", when);
         entryString = ReadLine();
         num = Convert.ToInt32(entryString);
      }
      return num;
   }
   public static void DisplayRelationship(int numThisYear, int numLastYear)
   {
      if(numThisYear > 2 * numLastYear)
         WriteLine("The competition is more than twice as big this year!");
      else
         if(numThisYear > numLastYear)
            WriteLine("The competition is bigger than ever!");
         else
            if(numThisYear < numLastYear)
               WriteLine("A tighter race this year! Come out and cast your vote!");
   }
   public static void GetContestantData(int numThisYear, string[] names, char[] talents, char[] talentCodes, string[] talentCodesStrings, int[] counts)
   {
      int x = 0;
      bool isValid;
      while(x < numThisYear)
      {
         Write("Enter contestant name >> ");
         names[x] = ReadLine();
         WriteLine("Talent codes are:");
         for(int y = 0; y < talentCodes.Length; ++y)
            WriteLine("  {0}   {1}", talentCodes[y], talentCodesStrings[y]);
         Write("       Enter talent code >> ");
         talents[x] = Convert.ToChar(ReadLine());
         isValid = false;
         while(!isValid)
         {
            for(int z = 0; z < talentCodes.Length; ++z)
            {
               if(talents[x] == talentCodes[z])
               {
                   isValid = true;
                   ++counts[z];
               }
            }
            if(!isValid)
            {
               WriteLine("{0} is not a valid code", talents[x]);
               Write("       Enter talent code >> ");
               talents[x] = Convert.ToChar(ReadLine());
            }
         }
         ++x;
     }
   }
   public static void GetLists(int numThisYear, char[] talentCodes, string[] talentCodesStrings, string[] names, char[] talents, int[] counts)
   {
     int x;
     char QUIT = 'Z';
     char option;
     bool isValid;
     int pos = 0;
     bool found;
     WriteLine("\nThe types of talent are:");
     for(x = 0; x < counts.Length; ++x)
        WriteLine("{0, -20}  {1, 5}", talentCodesStrings[x], counts[x]);
     Write("\nEnter a talent type or {0} to quit >> ", QUIT);
     option = Convert.ToChar(ReadLine());
     while(option != QUIT)
     {
         isValid = false;
         for(int z = 0; z < talentCodes.Length; ++z)
         {
            if(option == talentCodes[z])
            {
                isValid = true;
                pos = z;
            }
         }
         if(!isValid)
             WriteLine("{0} is not a valid code", option);
         else
         {
            WriteLine("\nContestants with talent {0} are:", talentCodesStrings[pos]);
            found = false;
            for(x = 0; x < numThisYear; ++x)
            {
               if(talents[x] == option)
               {
                   WriteLine(names[x]);
                   found = true;
               }
            }
            if(!found)
                WriteLine("No contestants had talent {0}", talentCodesStrings[pos]);
          }

          Write("\nEnter a talent type or {0} to quit >> ", QUIT);
          option = Convert.ToChar(ReadLine());
      }
   }
}