/*
    Array1.java
    CIS 160
    David Klick
    2004-11-01

    Basic array usage; passing arrays to methods
*/

public class Array1 {
    public static void main(String[] args) {
        int[] num;
        num = new int[5];
        // alternative to above line:
        //    int[] num = new int[5];

        initArray(num);
        System.out.println("Randomized integer array:");
        displayArray(num);
        System.out.println("Minimum value = " + findMin(num));
        System.out.println("Maximum value = " + findMax(num));
        System.out.println("Sum of array  = " + sumArray(num));
        
        System.out.println("\nSorted integer array:");
        sortArray(num);
        displayArray(num);
        
        System.out.println("\nCleared integer array:");
        clearArray(num);
        displayArray(num);
    }

    private static void initArray(int[] a) {
        for (int i=0; i<a.length; i++) {
            a[i] = (int) (Math.random() * 1000);
        }
    }

    private static void displayArray(int[] a) {
        for (int i=0; i<a.length; i++) {
            System.out.println(i + ": " + a[i]);
        }
    }

    private static void clearArray(int[] a) {
        for (int i=0; i<a.length; i++) a[i] = 0;
    }

    private static int findMin(int[] a) {
        int min = a[0];
        for (int i=1; i<a.length; i++) {
            if (a[i] < min) min = a[i];
        }
        return min;
    }

    private static int findMax(int[] a) {
        int max = a[0];
        for (int i=1; i<a.length; i++) {
            if (a[i] > max) max = a[i];
        }
        return max;
    }

    private static int sumArray(int[] a) {
        int sum = 0;
        for (int i=0; i<a.length; i++) sum += a[i];
        return sum;
    }

    private static void sortArray(int[] a) {
        for (int i=0; i<a.length-1; i++) {
            for (int j=i+1; j<a.length; j++) {
                if (a[i] > a[j]) {
                    int temp = a[i];
                    a[i] = a[j];
                    a[j] = temp;
                }
            }
        }
    }
}