Count input values?

[dadimar]

I'm trying to write a program that reads unspecified number of positive and negative values, counts them and computes the average of the input values, not counting zeros. The program should end with the input 0 and display the average as a floating point number.

What can I use to count the input values?

Example: If I type 1, 2 and 0 the average should be 1.5

Ps: I'm a beginner...

[r035198x]

I'm trying to write a program that reads unspecified number of positive and negative values, counts them and computes the average of the input values, not counting zeros. The program should end with the input 0 and display the average as a floating point number.

What can I use to count the input values?

Example: If I type 1, 2 and 0 the average should be 1.5

Ps: I'm a beginner...

Read about the Scanner class (for reading the input) and try the program. You should make use of a while loop.
Post if you get stuck with the code.

[dadimar]

Read about the Scanner class (for reading the input) and try the program. You should make use of a while loop.
Post if you get stuck with the code.

Yes I know how to read the input, but how do I count it ?

[Nepomuk]

Yes I know how to read the input, but how do I count it ?

How would you count them in real life? Think about that, then you'll find the answer.

PS.: Have you found out yet, if the number is positive or negative? That's the first step of course.

Greetings,
Nepomuk

[r035198x]

Yes I know how to read the input, but how do I count it ?

The while loop

[dadimar]

I have no idea. Am I on the right track:

import java.util.Scann er;

public class Skilaverkefni2{
public static void main(String[] args) {

Scanner read = new Scanner(System. in);

System.out.prin tln("text: ");

int number = read.nextInt();

while (number != 0) {

}

System.out.prin tln("Quit");
}
}

[r035198x]

I have no idea. Am I on the right track:

import java.util.Scann er;

public class Skilaverkefni2{
public static void main(String[] args) {

Scanner read = new Scanner(System. in);

System.out.prin tln("text: ");

int number = read.nextInt();

while (number != 0) {

}

System.out.prin tln("Quit");
}
}

1.) Use code tags for posting code
2.) Try it on the compiler and see what it does or doesn't do.

[dadimar]

  
while (number != 0) {
number = read.nextInt();
};
System.out.println("Quit");

This gives me the ability to enter unspecified amount of numbers until I decide to quit by entering 0 as an input.

[dadimar]

  
while (number != 0) {
number = read.nextInt();
};
System.out.println("Quit");

This gives me the ability to enter unspecified amount of numbers until I decide to quit by entering 0 as an input.

I'm trying to figure out how I can add the input numbers together and get the average. Am I on the right track?

[Nepomuk]

I'm trying to figure out how I can add the input numbers together and get the average. Am I on the right track?

Yes, you are. Now think about how you can calculate the average - how would you do it in real life?

Greetings,
Nepomuk

[r035198x]

I'm trying to figure out how I can add the input numbers together and get the average. Am I on the right track?

You need a counter (int) to count the numbers and a double variable to store the total and perhaps another one for the average.

[dadimar]

Yes, you are. Now think about how you can calculate the average - how would you do it in real life?

Greetings,
Nepomuk

I would add them together, count the amount of numbers and divide with the amount.

What I learned is that this code reads the next input number, but overwrites it if I decide to continue with a new number I put in.

while (number != 0) {
number = read.nextInt();
};
System.out.println("Quit");

I put 25, 43 and 55 in. If I add System.out.prin tln(number) I get the last number 55.

[r035198x]

I would add them together, count the amount of numbers and divide with the amount.

What I learned is that this code reads the next input number, but overwrites it if I decide to continue with a new number I put in.

while (number != 0) {
number = read.nextInt();
};
System.out.println("Quit");

I put 25, 43 and 55 in. If I add System.out.prin tln(number) I get the last number 55.

Perhaps now is the time to read a tutorial?

[dadimar]

int count = 1;
int number  = read.nextInt();

while (number != 0) {
    number = read.nextInt();
    if (number != 0) count++; 
    };
    System.out.println("Quit....");

This is one way to count how often input numbers are put in.

[Nepomuk]

int count = 1;
int number  = read.nextInt();

while (number != 0) {
    number = read.nextInt();
    if (number != 0) count++; 
    };
    System.out.println("Quit....");

This is one way to count how often input numbers are put in.

Good, now you have the last number and the amount of numbers. You just need the sum of all numbers now... You're nearly there!

Greetings,
Nepomuk