Write a program to read three number A, B, and C and prints the largest value and the smallest value. Value of A, B, and C are assumed to be distinct.

Algorithm MAXMIN_3. This algorithm reads three numbers, A, B, and C and prints the largest value and the samllerest value. Value are assumed to be distinct.

1. [Input data values]
   Read(A,B,C)
   
   
2. [Determine largest values]
   MAX <- A
   If B > MAX
   Then MAX <- B
   IF C > MAX
   Then MAX <- C
   
   
3. [Determine smallest values]
   MIN <- A
   If B < MIN
   Then MIN <- B
   IF C < MIN
   Then MIN <- C
   
   
4. [Output results]
   Write('Largest value is', MAX,',Smallest is',MIN)
   
   
5. [Finished]
   Halt

/*
	This program reads three numbers, number1, number2, 
        and number3; and prints the largest value 
        and the samllerest value.
*/
import javax.swing.JOptionPane;

public class MaxMin3 {

   public static void main( String args[] ) 
   {
      double max;  // maximum value entered by user
      double min;  // minimum value entered by user 

      String firstNumber;   // first string entered by user
      String secondNumber;  // second string entered by user
      String thirdNumber;  // third string entered by user

      double number1;       // first number to compare
      double number2;       // second number to compare
      double number3;       // third number to compare

      // obtain first number from user
      firstNumber = JOptionPane.showInputDialog(
         "Enter first floating-point value" );

      // obtain second number from user
      secondNumber = JOptionPane.showInputDialog(
         "Enter second floating-point value" );

      // obtain second number from user
      thirdNumber = JOptionPane.showInputDialog(
         "Enter third floating-point value" );

      // convert numbers from type String to type double
      number1 = Double.parseDouble( firstNumber ); 
      number2 = Double.parseDouble( secondNumber );
      number3 = Double.parseDouble( thirdNumber );

      //  Determine largest value
      max = number1;
      if (number2 > max)
	 max = number2;
      if (number3 > max)
	 max = number3;

      //  Determine smallest value
      min = number1;
      if (number2 < min)
	 min = number2;
      if (number3 < min)
	 min = number3;

      // display result
      JOptionPane.showMessageDialog( null, 
         "Largest value is " + max + " ,Smallest is " + min, 
         "MaxMin3", JOptionPane.INFORMATION_MESSAGE );

      System.exit( 0 );  // terminate the program

   } // end main

} // end class MaxMin3