Question

Write a program that asks the user to type in ages. They will type a negative age when they finish entering the ages. The program will print out the average of all of the ages and the oldest age entered. It should end with a newline.

Sample output #1

Type a negative for age to exit
Enter your age: 21
Enter your age: 22
Enter your age: 21
Enter your age: -8
The average age is: 21.33
The oldest person is: 22 years old

Sample output #2

Type a negative for age to exit
Enter your age: -10
No ages were entered

This is what I have so far:

import java.util.Scanner;

public class Main
{
public static void main(String [] args) {
Scanner kb = new Scanner(System.in);
int age;
int max;
int count;
int avg;
System.out.println("Type a negative for age to exit");
System.out.print("Enter your age: ");
age = kb.nextInt();
  
avg = 0;
count = 0;
  
avg = age;
max = age;
  
while(age > 0) {
System.out.print("Enter your age: ");
age = kb.nextInt();
  
if(max < age) {
max = age;
}
if(age < 0) {
avg = avg + age;
count = count + 1;
}
if(count <= 0){
System.out.println("No ages were entered");
}
else {
System.out.printf("The average age is: %.2f\n", (1.0 * avg / count));
System.out.println("The oldest person is: " + max + " years old");
}
  
}
  
}
  

}

getting these errors:

1.

Input

-5

Your output

Type a negative for age to exit Enter your age:

Expected output

Type a negative for age to exit Enter your age: No ages were entered

2.

Input

95 -5

Your output

Type a negative for age to exit Enter your age: Enter your age: The average age is: 90.00 The oldest person is: 95 years old

Expected output

Type a negative for age to exit Enter your age: Enter your age: The average age is: 95.00 The oldest person is: 95 years old

Answer 1

// NOTE: I have fixed the code

import java.util.Scanner;

public class Main
{
public static void main(String [] args) {
Scanner kb = new Scanner(System.in);
int age;
int max;
int count;
float avg;
int sum=0;
System.out.println("Type a negative for age to exit");
System.out.print("Enter your age: ");
age = kb.nextInt();
  
avg = 0;
count = 0;
  
avg = age;
max = age;
  
while(age > 0) {
if(max < age) {
max = age;
}
sum=sum+age;
count=count+1;
System.out.print("Enter your age: ");
age = kb.nextInt();
}
avg=(float)sum/count;
if(count == 0){
System.out.println("No ages were entered");
}
else {
System.out.printf("The average age is: %.2f\n", avg);
System.out.println("The oldest person is: " + max + " years old");
}
  
}
  

}