如何显示用户输入的最高和最低数字？

Question

The program asks the user to input any amount of people they want. The program will then ask for the height of each person (not in feet, just in whole numbers like 5, 7, 10, etc.). The program then displays the average height of all those people as well as the tallest and shortest height out of those people.

The average height part works but my problem is trying to display the tallest height entered and shortest height entered.

package loop2;

import java.io.Reader;
import java.text.DecimalFormat;
import java.util.Random;
import java.util.Scanner;

public class PgmTemplate {

   public static void main(String[] args) {
       Scanner input =new Scanner(System.in);
        int sum =0;
        int number=0, n;
        int average = 0;
        int highest= 0;
        int lowest= 0;
        lowest = number;
        System.out.println("enter the number of people");
        n = input.nextInt();
        for(int i = 0; i < n; i++) {
            System.out.println("enter the height of each person");
            number = input.nextInt();
            sum += number;
            average = sum / n;
        }
        if(number > highest) {
            highest = number;
        }else if(number < lowest) {
            lowest = number;
        }
        System.out.println("the average height is "+ average);
        System.out.println("the tallest person is " + highest);
        System.out.println("the shortest person is " + lowest);
    }
}

Answer 1

No need to calculate the average after every input.

I would do it like this:

lowest = Integer.MAX_VALUE
...
for (int i = 0; i < n; i++) {
  int number = scanner.nextInt();
  sum += number;
  if (number > highest)
    highest = number;
  if (number < lowest)
    lowest = number;
}

Then after getting all the input, you have what you need:

System.out.println("the average height is " + (sum / n));
System.out.println("the tallest person is " + highest);
System.out.println("the shortest person is " + lowest);

Answer 2

You need to put those checks between number , highest and lowest inside the loop.

As it stands you're only checking for the latest number that has been input.

Also you don't need to calculate a running average. So, move that outside the loop.

for (int i = 0; i < n; i++) {
    System.out.println("enter the height of each person");
    number = input.nextInt();
    sum += number;
    if (number > highest) {
        highest = number;
    } else if (number < lowest) {
        lowest = number;
    }
}
average = sum / n;