assig_4

//Alice Miller
// 2/13/14
//Assingment 4, Median and average
//Notes: The individual parts should work but the whole thing isn't cohesive. Sorry.

import java.util.Scanner;

public class ArrayTraversal {
   
  public static void main(String[] args) {
    //Initialize optoin
    int optoin = 0;
    while (option != 6){
      System.out.println("Array Traversal");
      System.out.println("1. Add a number to the array.");
      System.out.println("2. Display the mean.");
      System.out.println("3. Display the median.");
      System.out.println("4. Print the array to the screen.");
      System.out.println("5. Print the array in reverse order.");
      System.out.println("6. Quit.");
      System.out.println("Please select your choice: ");
      Scanner kb = new Scanner(System.in);
      int option = kb.nextInt();
      int[] numbers;
     
      switch (option) {
      case 1://Add a number to the array
       int[] array = numbers[];
      break; 
      case 2://Display mean
       double mean = getMean();
      break;
      case 3://Display median
       int median = getMedian();
      break;
      case 4://Print in order
       int print = displayLowHigh();         
      break;
      case 5://Print in reverse order
       int print = displayHighLow();         
      break;
      case 6://quit
      break;
      default: 
        System.out.println("Invalid selection.");
      }
    }
  }
  //////////////////////////////////////////////////////////////////
  // TODO This function should take an array and sort it
  // USE this instead of writing sort in to multiple function
  //////////////////////////////////////////////////////////////////
  public static int[] sort(int[] numbers){
    
  }
   
   
   
  //Add int to array
  public static int[] addInt (int[] numbers) {
    //Creating new array
    int oldLength = numbers.length;
    int newLength = oldLength + 1;
    int[] newNumbers = new int[newLength];
    //Duplicating numbers
	  for (int i = 0; i < oldLength; i++) {
		  newNumbers[i] = numbers[i];
	  }
	  System.out.println ("Enter new integer; "); //Asking for new number
    Scanner input = new Scanner(System.in);
		newNumbers[newLength - 1]= input.nextInt(); //New number is set at the end of array
		return newNumbers;
  }
      

  public static void getMean(int[] numbers) {//Get mean
    double mean = 0;//initialize mean and sum
    double sum = 0;
    //Sum up the numbers in a the list
    for (int index = 0; index < numbers.length; index++) { 
      sum = numbers[index] + sum;    
    }
    //Get average
    mean = sum / numbers.length;
    System.out.printf("The mean is %4.2f.", mean); //Print average
  }
  
  //////////////////////////////////////////////////////////
  // TODO: Rewrite this using the sort method that you wrote
  // above
  // TODO: line 105 only handles *half* of the cases, a
  // list of numbers still has a median even if it is an odd len
  //////////////////////////////////////////////////////////
  public static void getMedian(int[] numbers) { //Get median   
    int key = numbers[0];
    for (int index = 1; index < numbers.length; index++) { //Sort
      int position = index;
      while (position > 0 && key < numbers[position - 1]) {
        numbers[position] = numbers[position - 1];
        position--;
      }
      numbers[position] = key;
    }     
    int median = 0; //Get median
    if (numbers.length % 2  == 1) {
      median = numbers[numbers.length / 2];
      System.out.println("Median is " + median);
    }
  }    
  
  //////////////////////////////////////////////////////////
  // TODO: Rewrite this using the sort method that you wrote
  // above... It should be about 5 lines
  //////////////////////////////////////////////////////////
  public static void displayLowHigh(int[] numbers) {     //Display numbers from low to high   
   for (int index = 1; index < numbers.length; index ++) { //Sort
      int key = numbers[index];
      int position = index;
        while (position > 0 && key < numbers[position - 1]) {
          numbers[position] = numbers[position -1];
          position --;
          } //end while
        numbers[position] = key;
    }
    for (int index = 1; index < numbers.length; index ++) { //Display numbers from low to high
      System.out.println(numbers[index]);
    }
  }
    
   //////////////////////////////////////////////////////////
  // TODO: Rewrite this using the sort method that you wrote
  // above... It should be about 5 lines
  //////////////////////////////////////////////////////////
  public static void displayHighLow(int[] numbers) {     //Display numbers from High to low   
    for (int index = 1; index < numbers.length; index ++) { //Sort
      int key = numbers[index];
      int position = index;
      while (position > 0 && key < numbers[position - 1]) {
        numbers[position] = numbers[position -1];
        position --;
      } //end while
      numbers[position] = key;
    }
    for (int index = numbers.length; index > 1; index --) { //Display numbers from low to high
      System.out.println(numbers[index]);      
    }
  }
}

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