import java.util.Arrays;

import uwcse.io.Input;

public class ArrayExample {
	public static void main(String[] args) {
		// create an array of double elements of size 5
		double[] a = new double[5];

		// input 5 floating point numbers and store them in the
		// array
		// write length and NOT length(). length is a field and
		// not a method
		Input in = new Input();
		for (int i = 0; i < a.length; i++) {
			a[i] = in.readDouble("Enter a floating point number: ");
		}

		// display the array using the format
		// [1.2, 3.4, 5.5, 6.7, -1.3]
		String s = "[";
		for (int i = 0; i < a.length; i++) {
			s += a[i];
			// fence post problem: add a , only if it is not
			// the last element
			if (i < a.length - 1) {
				s += ", ";
			}
		}
		s += "]";
		System.out.println(s);
		
		// could also use the method toString in the Arrays class
		System.out.println(Arrays.toString(a));
		
		// average, max and min
		double sum = 0;
		// for-each loop
		for (double x: a) {
			sum += x;
		}
		System.out.println("average = " + sum/a.length);
		double max = a[0]; // could also use -Double.MAX_VALUE;
		double min = a[0]; // could also use Double.MAX_VALUE;
		for (int i = 1; i < a.length; i ++) {
			if (a[i] > max) {
				max = a[i];
			}
			if (a[i] < min) {
				min = a[i];
			}
		}
		System.out.println("max = " + max);
		System.out.println("min = " + min);
		
		// can't change the length of a directly
		// a.length += 2 doesn't work
		// to add 2 elements to a, do the following
		// create an array b that has length = a.length + 2
		double[] b = new double[a.length + 2];
		// copy a in b
		for (int i = 0; i < a.length; i ++) {
			b[i] = a[i];
		}
		// rename the array b a
		a = b;
		
	}
}