Check the value frequency in an array - CSharp Language Basics

CSharp examples for Language Basics:Array

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Description

Check the value frequency in an array

Demo Code

using System;/*w ww  . j a  v  a  2  s  .c  o m*/
class StudentPoll
{
   static void Main()
   {
      int[] responses = {1, 2, 5, 4, 3, 5, 2, 1, 2, 5, 1, 2, 5, 4, 3, 5, 2,
      1, 2, 5, 4, 3, 1, 2, 5, 4, 3, 5, 2,
      5, 2,1, 2, 5, 4, 3, 5, 2,
      4, 3, 5, 2,1, 2,1, 2, 5, 4, 3,
      5, 2, 5, 4, 3, 5, 2,1, 3, 3, 1, 4, 3, 3, 3, 2, 3, 3, 2, 14};
      var frequency = new int[6]; // array of frequency counters
      // for each answer, select responses element and use that value
      // as frequency index to determine element to increment
      for (var answer = 0; answer < responses.Length; ++answer)
      {
         try
         {
            ++frequency[responses[answer]];
         }
         catch (IndexOutOfRangeException ex)
         {
            Console.WriteLine(ex.Message);
            Console.WriteLine($"   responses[{answer}] = {responses[answer]}\n");
         }
      }
      Console.WriteLine($"{"Rating"}{"Frequency",10}");
      for (var rating = 1; rating < frequency.Length; ++rating){
         Console.WriteLine($"{rating,6}{frequency[rating],10}");
      }
   }
}

Result


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