Java Input and Out put

Question

Hi my code should do this instruction below but am not getting it at all

The user can enter as many positive floating-point numbers on the console as desired. Zero (or a negative numbers) signals end of input (no more numbers can be entered). After input the program displays ? the smallest number entered (min) ? the largest number entered (max) ? the mean of all numbers entered (mean) Do NOT use arrays for this assignment, even if you know them.

Sample should look like this

enter numbers: 1 2 3 4 5 6 0 numbers entered: 6 minimum: 1.00 maximum:6.00 mean: 3.50

enter numbers: 0 no number entered.

public class LoopStatistics {

public static void main(String[] args) {

    double max, min, sum=0, input, mean=0;
    int counter = 0;

    TextIO.putln("enter numbers:");

    do
    {
        input = TextIO.getDouble();

        min = input;
        max = input;

        counter++;

        if (input > max)
            max = input;

        if ( input < min)
            min = input;

        sum = sum + input;



        } while( input != 0);
    mean = sum / counter;
    TextIO.putf("numbers entered:%d
", counter);
    TextIO.putf("minimum:%f
", min);
    TextIO.putf("maximum:%f
", max);
    TextIO.putf("mean:%f", mean);





}

}

Answer 1

You assign your max and min before you test whether they are greater/less than the current max/min:

min = input;
max = input;

This means that they both equal whatever the person entered last.

Tidying up your code and removing those calls yields:

public static void main(String[] args) throws Exception {
    final Scanner scanner = new Scanner(System.in);
    double max = 0;
    double min = Double.POSITIVE_INFINITY;
    double sum = 0;
    int counter = 0;
    while (true) {
        final double d = scanner.nextDouble();
        if (d <= 0) {
            break;
        }
        sum += d;
        max = Math.max(max, d);
        min = Math.min(min, d);
        ++counter;
    }
    System.out.println("Max=" + max);
    System.out.println("Min=" + min);
    System.out.println("Ave=" + sum / counter);
}