public class ArrayExamp
{
static int n[] = { 43, 74, 92, 56, 57, 94, 87, 21, 76, 57, 39, 57, 68 };

public static void main(String args[])
{
for (int x = 0; x < n.length; x++)
System.out.print(n[x] + " ");

System.out.println();
System.out.println("Average is " + findAvg());
}

static public double findAvg()
{
int sum = 0;
for (int x = 0; x < n.length; x++) sum = sum + n[x];
return sum / n.length;
}

}


/* Run this program. Now write a method called findBig that will return
an integer with the highest number in the array.

Now add a method called findAs that will return how many scores were in the 80s.

(Difficult)Now see if you can write a method to find the score that is the most
frequent (in this case 57). Call it findMode and it will return an integter.

MORE PRACTICE:

These are sample practice programs similar to the ones
you will be asked to write on the test. They will use this template:

public class ArrayExamp
{
static int n[] = { 43, 74, 92, 56, 57, 94, 87, 21, 76, 57, 39, 57, 68 };

public static void main(String args[])
{
for (int x = 0; x < n.length; x++)
System.out.print(n[x] + " ");

System.out.println();
System.out.println("Average is " + findAvg());
}

static public double findAvg()
{
int sum = 0;
for (int x = 0; x < n.length; x++) sum = sum + n[x];
return sum / n.length;
}

}

You will be asked to write only a method similar to the findAvg
method above. Use this template, however, to test your method.
Change the values of the Array. You may use String arrays on
some problems.

Write a method that returns:

• · the sum of all the values less than the average.
• · the value before the highest score (0 if the highest score
   is first) in the array
• · the avg of all numbers more than 10 below the high score
• · all scores that appear only once
• · the average of all the scores with the highest one excluded
• · the highest 2 scores

Write a method that passes in 2 integers and returns with the sum of
all the numbers in the array that are between these two numbers.
( in this case, we are testing it with 50 and 80 )

public class ArrayExamp
{
static int n[] = { 43, 74, 92, 56, 57, 94, 87, 21, 76, 57, 39, 57, 68 };

public static void main(String args[])
{
for (int x = 0; x < n.length; x++)
System.out.print(n[x] + " ");

System.out.println();
System.out.println("Sum of nums between 50 and 80 = " + sumSpread(50,80));
}

static public int sumSpread(int low, int high)
{
int sum = 0;
for (int x = 0; x < n.length; x++)
{
if ( n[x] >= low )
if ( n[x] <= high )
sum = sum + n[x];
}

return sum;
}

}

import java.applet.Applet;
import java.awt.*;

public class ArrayInput extends Applet
{

   TextField t1,t2;
   Button b1;
   String names[];
   String scores[];
   int acount;

   public void init()
   {
         b1 = new Button("Enter");
         t1 = new TextField(10);
         t2 = new TextField(10);
         add(b1);
         add(t1);
         add(t2);

         names = new String[50];
         scores = new String[50];

         acount = 0;
   }

   public void paint(Graphics g)
   {
         for (int x=0;x<acount;x++)
         {
               g.drawString(names[x] + ",",x*25,100);
               g.drawString(scores[x] + ",",x*25,120);
         }
     }

   public boolean action(Event e,Object o)
   {
         if (e.target==b1)
         {
               names[acount] = t1.getText();
               scores[acount] = t2.getText();
               acount++;
         }

       t1.setText("");
       t2.setText("");

       repaint();

       return true;
   }

}

Write a program to input names and test scores from the user,
until the user enters 'stop' for the name TextField. Then the program will
calculate the High score, the Low score, and the Average score. The program
 will list all the students at or above the average. The program will then call a
 method that will find the average of all the students BELOW the average
and print this out. (if the average test score is 60, it will find the average
score for all those students who scored below 60). For an extra challenge, your
 program will allow you to do the task again, as in the applet below

A Challenge BlackJack program  (You do not need arrays for this one..)