Second Summer 2002


Iffy Practice Problems: This is textbook chapter 5. Programming problems. The Solutions.

The solutions presented below are in plain format.

::::::::::::::
One.java
::::::::::::::


       import java.io.*; 

       public class One {
           public static void main(String[] args) {
               double a, b, c; 
               ConsoleReader console = new ConsoleReader(System.in); 
               System.out.print("Please enter the value of a then press Enter : "); 
               a = console.readDouble(); 
               System.out.print("Please enter the value of b then press Enter : "); 
               b = console.readDouble(); 
               System.out.print("Please enter the value of c then press Enter : "); 
               c = console.readDouble(); 
               double x1, x2; 
               if (b * b - 4 * a * c < 0) {
                   System.out.println("There are no solutions."); 
               } else { 
                   if (a == 0) {
                       if (b == 0) {
                           if (c == 0) {
                               System.out.println("Identity: zero == zero."); 
                           } else { 
                               System.out.println(c + " is not zero"); 
                           } 
                       } else { 
                           System.out.println(-c/b); 
                       } 
                   } else { 

// Notice a big mistake here: 

                       x1 = - b - Math.sqrt(b * b - 4 * a * c) / (2 * a); 
// should be:          x1 = (- b - Math.sqrt(b * b - 4 * a * c)) / (2 * a); 

                       x2 = - b + Math.sqrt(b * b - 4 * a * c) / (2 * a); 
// should be:          x2 = (- b + Math.sqrt(b * b - 4 * a * c)) / (2 * a); 

                       System.out.println(x1 + " " + x2); 

// Thanks to nminibay for catching the error (also see text page 75)

// Apologies for the unexplainable lack of attention. Darn!

                   }
               } 
           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Two.java
::::::::::::::


       import java.io.*; 

       public class Two {
           public static void main(String[] args) {

               ConsoleReader console = new ConsoleReader(System.in); 
               System.out.print("Enter the card notation: "); 
               String card = console.readLine(); 

               String one = card.substring(0, 1); 
               String two = card.substring(1, 2); 

               if      (one.equalsIgnoreCase("A"))  System.out.print("Ace of ");
               else if (one.equals("2"))            System.out.print("Two of ");
               else if (one.equals("3"))            System.out.print("Three of ");
               else if (one.equals("4"))            System.out.print("Four of ");
               else if (one.equals("5"))            System.out.print("Five of ");
               else if (one.equals("6"))            System.out.print("Six of ");
               else if (one.equals("7"))            System.out.print("Seven of ");
               else if (one.equals("8"))            System.out.print("Eight of ");
               else if (one.equals("9"))            System.out.print("Nine of ");
               else if (one.equals("1"))  {
                   if (two.equals("0")) { 
                       System.out.print("Ten of ");
                       two = card.substring(2, 3); 
                   }
               } 
               else if (one.equalsIgnoreCase("J"))  System.out.print("Jack of ");
               else if (one.equalsIgnoreCase("Q"))  System.out.print("Queen of ");
               else if (one.equalsIgnoreCase("K"))  System.out.print("King of ");
               else System.out.print("Unknown denomination of "); 

               if      (two.equalsIgnoreCase("D")) System.out.println("diamonds.");
               else if (two.equalsIgnoreCase("H")) System.out.println("hearts.");
               else if (two.equalsIgnoreCase("S")) System.out.println("spades.");
               else if (two.equalsIgnoreCase("C")) System.out.println("clubs.");
               else System.out.println("unknown colour."); 

           }
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Three.java
::::::::::::::


       import java.io.*; 

       public class Three {
           public static void main(String[] args) {
               double a, b, c; 
               ConsoleReader console = new ConsoleReader(System.in); 
               System.out.print("Please enter the value of a then press Enter : "); 
               a = console.readDouble(); 
               System.out.print("Please enter the value of b then press Enter : "); 
               b = console.readDouble(); 
               System.out.print("Please enter the value of c then press Enter : "); 
               c = console.readDouble(); 

               if (a >= c) {
                   if (a >= b) {
                       System.out.println("The largest number is: " + a); 
                   } else { 
                       System.out.println("The largest number is: " + b); 
                   } 
               } else {
                   if (c >= b) {
                       System.out.println("The largest number is: " + c); 
                   } else { 
                       System.out.println("The largest number is: " + b); 
                   } 
               } 

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Four.java
::::::::::::::


public class Four {
    public static void main(String[] args) {
	Circle circle;
	ConsoleReader console; 
	circle = new Circle(110, 120, 100); 
        System.out.println("Welcome. Circle created. "); 
	System.out.println("Center is at: " + circle.getCenter()); 
	System.out.println("Radius is: " + circle.getRadius()); 
	System.out.println("You will be asked to specify a point."); 
	System.out.println("First enter x, then enter y."); 
        System.out.print("Please enter x now: "); 
	console = new ConsoleReader(System.in); 
        double x = console.readDouble(); 
        System.out.print("Please enter y now: "); 
        double y = console.readDouble(); 
        if (circle.contains(x, y)) {
	    System.out.println("Congratulations."); 
	} else {
	    System.out.println("You missed."); 
	} 
    } 
} 

class Circle {
    private double xCenter, yCenter, radius; 
    Circle(double x, double y, double r) {
	xCenter = x; yCenter = y; radius = r;
    } 
    public boolean contains(double xPoint, double yPoint) {
	double distance = Math.pow(xCenter - xPoint, 2) + 
     	                  Math.pow(yCenter - yPoint, 2); 
	return distance <= radius * radius; 
    } 
    public String getCenter() {
      return "(" + xCenter + ", " + yCenter + ")"; 
    } 
    public double getRadius() {
      return radius; 
    } 
}


::::::::::::::
Five.java
::::::::::::::


public class Five {
    public static void main(String[] args) {
	ConsoleReader console; 
	console = new ConsoleReader(System.in); 
	System.out.print("Welcome. Please specify the " + 
                         "radius of the first circle: "); 
	double r1 = console.readDouble(); 
	System.out.print("Great. Now please specify the " + 
                         "radius of the second circle: "); 
	double r2 = console.readDouble(); 
	Circle combined = new Circle(100, 200, r1 + r2); 
        if (combined.contains(200, 100)) {
	    System.out.println("Circles intersect."); 
	} else {
	    System.out.println("Circles don't intersect."); 
	} 
    } 
} 

class Circle {
    private double xCenter, yCenter, radius; 
    Circle(double x, double y, double r) {
	xCenter = x; yCenter = y; radius = r;
    } 
    public boolean contains(double xPoint, double yPoint) {
	double distance = Math.pow(xCenter - xPoint, 2) + 
     	                  Math.pow(yCenter - yPoint, 2); 
	return distance <= radius * radius; 
    } 
    public String getCenter() {
      return "(" + xCenter + ", " + yCenter + ")"; 
    } 
    public double getRadius() {
      return radius; 
    } 
}


::::::::::::::
Six.java
::::::::::::::


       import java.io.*; 

       public class Six {
           public static void main(String[] args) {
               ConsoleReader console = new ConsoleReader(System.in); 

               System.out.print("Do you want to continue? "); 

               String answer = console.readLine(); 

               if (answer.equalsIgnoreCase("Y") || 
                   answer.equalsIgnoreCase("Yes") || 
                   answer.equalsIgnoreCase("OK") || 
                   answer.equalsIgnoreCase("Sure") || 
                   answer.equalsIgnoreCase("Why not?")) 
               {
                   System.out.println("OK"); 

               } else if (answer.equalsIgnoreCase("N") || 
                          answer.equalsIgnoreCase("No")) 
               { 
                   System.out.println("Terminating"); 

               } else 
               {
                   System.out.println("Bad input"); 
               } 

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }

::::::::::::::
Seven.java
::::::::::::::

       import java.io.*; 

       public class Seven {
           public static void main(String[] args) {
               ConsoleReader console = new ConsoleReader(System.in); 

               System.out.print("Enter a letter grade: "); 

               String grade = console.readLine(); 

               String letter = grade.substring(0, 1); 

               double value = 0; 

               if (letter.equals("A")) {
                   value = 4; 
               } else if (letter.equals("B")) {
                   value = 3; 
               } else if (letter.equals("C")) {
                   value = 2; 
               } else if (letter.equals("D")) {
                   value = 1; 
               } else if (letter.equals("F")) {
                   value = 0; 
               } else { 
                   System.out.println("Bad input."); 
                   System.exit(0); 
               }

               if (grade.length() > 1) {
                   String sign = grade.substring(1, 2); 

                   double extra = 0;

                   if (sign.equals("+")) {
                       extra = 0.3; 
                   } else if (sign.equals("-")) {
                       extra = -0.3; 
                   } else {
                       System.out.println("Bad input.");
                       System.exit(0);
                   } 

                   if (value > 0 && (value < 4.0 && sign.equals("-"))) {
                       value += extra; 
                   } 

               } 

               System.out.println("The numeric value is: " + value); 

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Eight.java
::::::::::::::

       import java.io.*; 

       public class Eight {
           public static void main(String[] args) {

               double score; 

               ConsoleReader console = new ConsoleReader(System.in); 
               System.out.print("Enter numeric score then press Enter : "); 

               score = console.readDouble(); 

               if        (score >= 4.0) {
                   System.out.println("A+"); 

               } else if (score >= 3.85) { 
                   System.out.println("A"); 

               } else if (score >= 3.5) { 
                   System.out.println("A-"); 

               } else if (score >= 3.15) { 
                   System.out.println("B+"); 

               } else if (score >= 2.85) { 
                   System.out.println("B"); 

               } else if (score >= 2.5) { 
                   System.out.println("B-"); 

               } else if (score >= 2.15) { 
                   System.out.println("C+"); 

               } else if (score >= 1.85) { 
                   System.out.println("C"); 

               } else if (score >= 1.5) { 
                   System.out.println("C-"); 

               } else if (score >= 1.15) { 
                   System.out.println("D+"); 

               } else if (score >= 0.85) { 
                   System.out.println("D"); 

               } else if (score >= 0.35) { 
                   System.out.println("D-"); 

               } else { 
                   System.out.println(""); 

               }

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Nine.java
::::::::::::::

       import java.io.*; 

       public class Nine {
           public static void main(String[] args) {

               String a, b, c; 

               ConsoleReader console = new ConsoleReader(System.in); 

               System.out.println("Enter three strings: "); 
               a = console.readLine(); 

               b = console.readLine(); 

               c = console.readLine(); 

               if (a.compareTo(b) < 0) {                                   // a, b
                   if (a.compareTo(c) < 0) {                               // a, c
                       if (b.compareTo(c) < 0) {                           // a, b, c
                           System.out.println(a + "\n" + b + "\n" + c);
                       } else {                                            // a, c, b
                           System.out.println(a + "\n" + c + "\n" + b);
                       } 
                   } else {                                                // c, a, b
                       System.out.println(c + "\n" + a + "\n" + b);
                   } 
               } else {                                                    // b, a
                   if (a.compareTo(c) < 0) {                               // b, a, c
                       System.out.println(b + "\n" + a + "\n" + c);
                   } else {                                                // c, a
                       if (b.compareTo(c) < 0) {                           // b, c, a
                           System.out.println(b + "\n" + c + "\n" + a);
                       } else {                                            // c, b, a
                           System.out.println(c + "\n" + b + "\n" + a);
                       } 
                   } 
               } 
           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Ten.java
::::::::::::::


       import java.io.*; 

       public class Ten {
           public static void main(String[] args) {

               int year; 

               ConsoleReader console = new ConsoleReader(System.in); 

               System.out.print("Please enter the year then press Enter : "); 

               year = console.readInt(); 

               if (    (((year % 4)  == 0) && ((year % 100) != 0) || (year < 1582))
                    ||
                       (  year % 400 == 0)
                  ) {

                   System.out.println("Leap year: " + year); 

               } else { 

                   System.out.println(year + " not a leap year!"); 

               } 

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Eleven.java
::::::::::::::


       import java.io.*; 

       public class Eleven {
           public static void main(String[] args) {
               ConsoleReader console = new ConsoleReader(System.in); 
               System.out.print("Enter a month : "); 
               int m = console.readInt(); 

               if        (m == 1) {
                   System.out.println("31 days"); 
               } else if (m == 2) {
                   System.out.println("28 or 29 days"); 
               } else if (m == 3) {
                   System.out.println("31 days"); 
               } else if (m == 4) {
                   System.out.println("30 days"); 
               } else if (m == 5) {
                   System.out.println("31 days"); 
               } else if (m == 6) {
                   System.out.println("30 days"); 
               } else if (m == 7) {
                   System.out.println("31 days"); 
               } else if (m == 8) {
                   System.out.println("31 days"); 
               } else if (m == 9) {
                   System.out.println("30 days"); 
               } else if (m == 10) {
                   System.out.println("31 days"); 
               } else if (m == 11) {
                   System.out.println("30 days"); 
               } else if (m == 12) {
                   System.out.println("31 days"); 
               } else {
                   System.out.println("Bad input"); 
               }

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Twelve.java
::::::::::::::


       import java.io.*; 

       public class Twelve {
           public static void main(String[] args) {

               double a, b;    

               ConsoleReader console = new ConsoleReader(System.in); 

               System.out.println("Comparing floating-point numbers."); 


	       System.out.print("Enter the first number : ");
               a = console.readDouble(); 
	       System.out.print("Enter the second number: ");
               b = console.readDouble(); 

               int n, m; 

               n = (int)(100 * a); 
               m = (int)(100 * b); 

               if (n == m) 
               {
                   System.out.println(a + " and " + b + 
                                      " are the same up to two decimal places.");
               } else 
               {
                   System.out.println(a + " and " + b + 
                                      " are NOT the same up to two decimal places.");
               } 

               if (Math.abs(a - b) < 0.01) 
               {
                   System.out.println(a + " and " + b + 
                                      " are within 0.01 of one another."); 
               } else 
               { 
                   System.out.println(a + " and " + b + 
                                      " are NOT within 0.01 of one another."); 
               } 

               System.out.println("Thanks for asking."); 

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


::::::::::::::
Thirteen.java
::::::::::::::

       import java.io.*; 

       class BankAccount {

           double balance; 

           BankAccount() { 

           } 

           BankAccount(double initialBalance) {
               this.balance = initialBalance; 
           } 

           void withdraw(double amount) {

               if (this.balance > amount) {
                   this.balance = this.balance - amount;
               } else {
                   System.out.println("Sorry, you cannot do that.");
               } 

           } 

           void deposit(double amount) {
               if (amount > 0) {
                   this.balance = this.balance + amount;
               } else { 
                   System.out.println("Sorry, you cannot do that.");
               } 

           } 

           double getBalance() {
               return balance; 
           } 

       }

       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }

       class Thirteen {
           public static void main(String[] args) {
               ConsoleReader c = new ConsoleReader(System.in); 
               System.out.println("Hello, and welcome to JavaOne Bank."); 
               System.out.println("An account will be created for you."); 
               System.out.println("What will the initial balance be?"); 
               System.out.println("Type it now: "); 
               BankAccount b = new BankAccount(c.readDouble()); 
               System.out.println("The current balance in your account is: " 
                                  + b.getBalance()); 
               System.out.println("You now want to make a deposit. How much?"); 
               System.out.println("Type the amount here: "); 
               b.deposit(c.readDouble()); 
               System.out.println("The current balance in your account is: " 
                                  + b.getBalance()); 
               System.out.println("You now want to make a withdrawal. How much?"); 
               System.out.println("Type it now: "); 
               b.withdraw(c.readDouble()); 
               System.out.println("The current balance in your account is: " 
                                  + b.getBalance()); 
               System.out.println("Thanks for using class BankAccount. Good-bye!"); 
           }
       }


::::::::::::::
Fourteen.java
::::::::::::::

       import java.io.*; 


       public class Fourteen {
           public static void main(String[] args) {

               String name; 
               double wage; 

               ConsoleReader console = new ConsoleReader(System.in); 

               System.out.print("Please enter employee's name then press Enter : "); 

               name = console.readLine(); 

               System.out.print("Please enter hourly wage then press Enter : "); 

               wage = console.readDouble(); 

               System.out.print("Please enter hours worked then press Enter: "); 

               double hours = console.readDouble(); 

               double overtime = (hours - 40); 

               System.out.println(" Paycheck for employee "  + name  + "\n\n" +
                                  " Hours worked: " + hours + "\n" +
                                  " Hourly wage: "  + wage  + "\n"   ); 

               double pay; 

               if (overtime > 0 ) {

                   pay = 40 * wage + overtime * (1.5 *wage); 

                   System.out.println(
                      " Overtime hours: " + overtime + "\n" +
                      " Overtime hourly wage: " + (1.5 * wage) + "\n"); 

               } else {
            
                   pay = hours * wage; 

               }

               System.out.println(" Total payment: " + pay);  

           } 
       } 
              
       class ConsoleReader { 
           public ConsoleReader(InputStream inStream) { 
               reader = new BufferedReader(
                          new InputStreamReader(
                            inStream));     
           }
           public String readLine() { 
               String inputLine = "";
               try {
                   inputLine = reader.readLine(); 
               } catch (IOException e) {
                   System.out.println(e); 
                   System.exit(1); 
               } 
               return inputLine; 
           }
           public int readInt() { 
               String inputString = readLine(); 
               int n = Integer.parseInt(inputString); 
               return n; 
           }
           public double readDouble() { 
               String inputString = readLine(); 
               double x = Double.parseDouble(inputString); 
               return x; 
           } 
           private BufferedReader reader; 
       }


Remember that
  1. there's always more than one way to achieve a result,
  2. and if you have a different solution that's actually even better!

Last updated: Jun 16, 2002 by Adrian German for A201