P7.1

/*
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package p71;

import java.util.Scanner;

/**
 *
 * @author student
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {


        Scanner scanner = new Scanner(System.in);
        System.out.print("How many digits in the BIGGER number? (must be 50 or less): ");
        int n = scanner.nextInt();


        double[] num1 = new double[n];

        double[] num2 = new double[n];

        System.out.println("Enter the digits from SMALLEST to LARGEST.\nDigits must be between 0 and 99.");

        int i;
        for (i = 0; i < n; i++) {
          Scanner in = new Scanner(System.in);
          System.out.print("Enter a digit: ");
          num1[i] = in.nextDouble();
        }

        System.out.println("Now enter the digits in the SMALLER NUMBER from SMALLEST to LARGEST. \nUse the same number of digits as the larger number; \nEnter 0 if the value of that digit is zero.\n(Ex. Larger number: 5004, Smaller number: 312. \nEnter 2, 1, 3, 0 for the smaller number.) ");

        int j;
        for (j = 0; j < n; j++) {
          Scanner in = new Scanner(System.in);
          System.out.print("Enter a number in the array: ");
          num2[i] = in.nextDouble();
        }

        double[] sum = new double[n];

        int k;
        for (k=1; k <= n; k++) {
          sum[k] = num1[k] + num2[k];
        }

        System.out.println("Sum = " + sum + "\n(Ex. if sum = [1, 13, 0, 0, 1],\nthen the sum is 23,001.)");


    }

}

E7.8

/*
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package e78;

import java.util.Arrays;
import java.util.Scanner;

/**
 *
 * @author student
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("How many numbers in the array?: ");
        int n = scanner.nextInt();

        double[] array = new double[n];

        int i;
        for (i = 0; i < n; i++) {
          Scanner in = new Scanner(System.in);
          System.out.print("Enter a number in the array: ");
          array[i] = in.nextDouble();
        }

        Arrays.sort(array);
       
        int middle = array.length/2; 

     
        System.out.println("Median = " + array[middle]);



    
    }


}

E7.2

/*
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 * and open the template in the editor.
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package e72;

import java.util.Scanner;

/**
 *
 * @author student
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        arrayRange();   



    }

    public static void arrayRange() {
     
        Scanner scanner = new Scanner(System.in);
        System.out.print("How many numbers in the array?: ");
        int n = scanner.nextInt();


        double[] array = new double[n];


        int i;
        for (i = 0; i < n; i++) {
          Scanner in = new Scanner(System.in);
          System.out.print("Enter a number in the array: ");
          array[i] = in.nextDouble();
        }


        double maximum = array[0];   // start with the first value
        for (int j=1; j<n; j++) {
          if (array[j] > maximum) {
            maximum = array[j];   // new maximum
            }
        }


        double minimum = array[0];
        for (int k=1; k<n; k++) {
          if (array[k] < minimum) {
            minimum = array[k];
          }
        }


        double range = maximum - minimum;
        System.out.println("Range = " + range);
}
}