Write a C# program that reads 43 numbers of values between 1 and 10 from a data

Question

Write a C# program that reads 43 numbers of values between 1 and 10 from a data file or keyboard. Display a frequency distribution bar chart of those numbers. Use asterisks to show the number of times each value was entered. If a given number is not entered, no asterisks should appear on that line. Your application should display error messages if a value outside the acceptable range is entered or if a non-numeric character is entered.

The contents of the data file are as follows:

7 8 9 4 5 6 3 2 3 3 2 2 6 5 4 9 8 7 4 5 6 7 8 9 3 2 3 3 2 3 4 5 6 7 8 9 7 7 8 8 9 7 9 -1

Explanation / Answer

Please find the required program along with its output. Please see the comments against each line to understand the step.

using System;

class IntSum
{
static void Main()
{
   int n=0;
Console.Write("Enter 43 numbers in the range 1-10: ");
   int [] arr = new int[43];   //array to store numbers
   int [] freqs = new int[10];   //array to store numbers frequency

   for(int i=0; i<43; i++){   //itearate the loop for 43 times
      
       try{
           n = int.Parse(Console.ReadLine());   //read a number
       }catch (FormatException){
           Console.WriteLine("{0} is not an integer", n);   //if the input is not a number, then print an error
       }
      
       while(!(n>=1 && n<=10)){   //if entered numer is not in the range read again till it is in range 1-10
          
           Console.WriteLine("Value not in the range. Try again..");
           try{
               n = int.Parse(Console.ReadLine());
           }catch (FormatException){
               Console.WriteLine("{0} is not an integer", n);
           }
          
       }
      
       if(freqs[n-1]==0)   //if number is in range, then add the frequency. For the first occurance, frequency will be set to 1
           freqs[n-1] = 1;
       else
           freqs[n-1] = freqs[n-1] + 1;   //increment frequency for each occurance

   }
  
   Console.WriteLine("Frequency distribution bar chart: ");   //print the chart

   for(int i=0; i<10; i++){
  
       int f = freqs[i];   //get the frequency corresponding to the number i
      
       Console.Write("{0}",(i+1));
      
       for(int j=1; j<=f; j++){
           Console.Write("*");   //print frequency times of *
       }
       Console.WriteLine("");
      
   }
}
}

----------------------------------------------------------------------------

OUTPUT:

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