Question

Step 4: Add code that discards any extra entries at the propmt that asks if you want to enter another score.

Notes from professor:

For Step 4, add a loop that will validate the response for the prompt question:

      "Enter another test score? (y/n): "

This loop must only accept the single letters of ‘y’ or ‘n’ (upper case is okay). I suggest that you put this loop inside the loop that already determines if the program should collect more input, after the code that calculates the average.

Here is what I have so far:

import java.util.Scanner;
import java.text.NumberFormat;

public class TestScoreApp
{
public static int getIntWithinRange(Scanner sc, String prompt,
int min, int max)
{
int i = 0;
boolean isValid = false;
while (isValid == false)
{
i = getInt(sc, prompt);
if (i <= min)
System.out.println(
"Error! Number must be greater than " + min + ".");
else if (i >= max)
System.out.println(
"Error! Number must be less than " + max + ".");
else
isValid = true;
}
return i;
}
  
public static int getInt(Scanner sc, String prompt)
{
int i = 0;
boolean isValid = false;
while (isValid == false)
{
System.out.print(prompt);
if (sc.hasNextInt())
{
i = sc.nextInt();
isValid = true;
}
else
{
System.out.println("Error! Invalid integer value. Try again.");
}
sc.nextLine(); // discard any other data entered on the line
}
return i;
}
public static void main(String[] args)
{
int scoreTotal = 0;
int scoreCount = 0;
int testScore = 0;
double averageScore = 0;

Scanner sc = new Scanner(System.in);
String choice = "y";
while (!choice.equalsIgnoreCase("n"))
{
// get the input from the user
System.out.print("Enter score: ");
testScore = sc.nextInt();
  
testScore = getIntWithinRange(sc,"Enter score: ",1,100);
scoreCount += 1;
scoreTotal += testScore;
averageScore = (double) scoreTotal / (double) scoreCount;

// see if the user wants to enter more test scores
System.out.print("Enter another test score? (y/n): ");
choice = sc.next();
  
}

NumberFormat number = NumberFormat.getNumberInstance();
number.setMaximumFractionDigits(1);
String message = "\n" +
"Score count: " + scoreCount + "\n"
+ "Score total: " + scoreTotal + "\n"
+ "Average score: " + number.format(averageScore) + "\n";
System.out.println(message);
}
  

}