Maximum PC

/**
*       Program:      K_D_Lifeboats.java
*       Author:       K. Dagenais
*      Student #:       0631794
*      Program:      CPA
*      Course:         INFO1150
*      Date:         11 févr. 2012
*      Description:   Program that calculates how many lifeboats are required on a given ship given the amount of people onboard
*                  capacity of the lifeboats
*/

import java.util.Scanner;

public class K_D_Lifeboats
{

   public static void main(String[] args)
   {

      // Create a Scanner object to read-in user inputs
      Scanner input = new Scanner(System.in);
      
      // Display a title
      System.out.println("Lifeboats Calculator\n");
            
      // 2. Ask the user to enter the following values:
      // a. The name of the ship (possibly including spaces like HMS Endurance)
      // b. The number of people on board the ship
      // c. The maximum number of people that can be carried by one lifeboat, assuming that all
      // the lifeboats on the ship are the same size
      // d. The actual number of lifeboats that are available on board the ship
      System.out.print("Enter the name of the ship: ");
      String shipName = input.nextLine();
      System.out.print("Enter the number of passangers on board of the ship: ");
      int passangersNumber = input.nextInt();
      System.out.print("Enter the maximum number of passangers that can fit in one lifeboat (same size boats): ");
      int maxPassangersLifeboat = input.nextInt();
      System.out.print("Enter the number of lifeboats that are available on board of the ship: ");
      int numberLifeboats = input.nextInt();
      
      double lifeboatsNeeded = passangersNumber / maxPassangersLifeboat;
      
      System.out.println("Here are the results...\n");
      
      if(passangersNumber > (numberLifeboats * maxPassangersLifeboat))
      {
         System.out.println("A minimum of " + (int)lifeboatsNeeded + " lifeboats are required to rescue everyone on board of " + shipName + ".\n");
         double survivors = numberLifeboats * maxPassangersLifeboat;
         double casualties = passangersNumber - survivors;
         double percentageSurvivors = (100 * survivors) / passangersNumber;
         double tempPercentageSurvivors = percentageSurvivors * 100;
         int tempPercentageSurvivors2 = (int)tempPercentageSurvivors;
         percentageSurvivors = tempPercentageSurvivors2 / 100.00;
         double percentageCasualties = (100 * casualties) / passangersNumber;
         double tempPercentageCasualties = percentageCasualties * 100;
         int tempPercentageCasualties2 = (int)tempPercentageCasualties;
         percentageCasualties = tempPercentageCasualties2 / 100.00;
         System.out.println((int)survivors + " people (" + percentageSurvivors + "%) would be rescued.");
         System.out.println((int)casualties + " people (" + percentageCasualties + "%) would likely drown.");
      }
      else
      {
         System.out.println("A minimum of " + (int)lifeboatsNeeded + " lifeboats are required to rescue everyone on board of " + shipName + ".\n");
         int extraPassangers = (numberLifeboats * maxPassangersLifeboat) - passangersNumber;
         System.out.println(passangersNumber + " people (100.00%) would be rescued.");
         System.out.println("0 people (0.0%) would likely drown.");
         System.out.println("There would be room for an extra " + extraPassangers + " people in the lifeboats.");
      }

   }

}

double lifeboatsNeeded = passangersNumber / maxPassangersLifeboat;
...
System.out.println("A minimum of " + (int)lifeboatsNeeded + " lifeboats are required to rescue everyone on board of " + shipName + ".\n");

double smallNine = 9.1
int nine = (int) smallNine

double bigNine = 9.9
int nine = (int) bigNine

floor(x) = max(m in Z such that m <= x) and ceiling(x) = min(m in Z such that m >= x) ... where x is a real number and Z is the set of integers.