Solving the class-average problem using sentinel-controlled iteration. - CSharp Language Basics

Description

Solving the class-average problem using sentinel-controlled iteration.

Demo Code

using System;/*from   w ww  .  jav a2s .  c  om*/
class ClassAverage
{
   static void Main()
   {
      int total = 0; // initialize sum of grades
      int gradeCounter = 0; // initialize # of grades entered so far
      // prompt for input and read grade from user
      Console.Write("Enter grade or -1 to quit: ");
      int grade = int.Parse(Console.ReadLine());
      // loop until sentinel value is read from the user
      while (grade != -1)
      {
         total = total + grade; // add grade to total
         gradeCounter = gradeCounter + 1; // increment counter
         // prompt for input and read grade from user
         Console.Write("Enter grade or -1 to quit: ");
         grade = int.Parse(Console.ReadLine());
      }
      // if the user entered at least one grade...
      if (gradeCounter != 0)
      {
         // use number with decimal point to calculate average of grades
         double average = (double)total / gradeCounter;
         // display the total and average (with two digits of precision)
         Console.WriteLine($"\nTotal of the {gradeCounter} grades entered is {total}");
         Console.WriteLine($"Class average is {average:F}");
      }
      else // no grades were entered, so output error message
      {
         Console.WriteLine("No grades were entered");
      }
   }
}

Result

• Previous
• Next

Related Tutorials

• while loops repeatedly execute a body of code while a bool expression is true.
• Calculate the sum of the integers from 1 to 10 using while loop
• Solving the class-average problem using counter-controlled iteration.
• Analysis of examination results, using nested control statements.
• Executing Code with the while Statement