Buffer error

Question about the task

Arithmetic mean

Java Syntax, Level 5, Lesson 5

Under discussion

Hi! I have a buffer error when I run the code. can someone help me with this?

Use the keyboard to enter numbers, and then calculate the arithmetic mean.
If the user enters -1, display the arithmetic mean of all entered numbers and end the program.
-1 should not be included in the calculation.

Here are some examples:
a) if you enter the numbers
1
2
2
4
5
-1
then we display
2.8

b) if you enter the numbers
4
3
2
1
-1
then we display
2.5

Hint: one of the solutions to this problem uses the following construct:

while (true) {
    int number = read the number;
    if (check whether the number is -1)
        break;
}

Requirements:

The program must read data from the keyboard.
The program should display data on the screen.
After entering -1, the program must correctly terminate.
If you sequentially enter the numbers 1, 2, 2, 4, 5 and -1, the program should display 2.8.
If you sequentially enter the numbers -100, 0, 100, and -1, the program should display 0.0.
If you sequentially enter the numbers 1 and -1, the program should display 1.0.
The displayed result should match the task conditions for any input data.

package com.codegym.task.task05.task0507; /* Arithmetic mean */ public class Solution { public static void main(String[] args) throws Exception{ BufferedReader reader=new BufferedReader(new InputStreamReader(System.in)); double sum=0; int count =0; while(true) { int nr=Integer.parseInt(reader.readLine()); count = count+1; sum = sum + nr; if (nr == -1) { break;} } System.out.println(sum/count); } }

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Misiu

Level 41 , Gdansk, Poland

2 August 2020, 12:00

Add: import java.io.BufferedReader; import java.io.InputStreamReader; Move lines 19-20 to other place (-1 should not be included in the calculation.).