/*  CIS 790        JAVA PROGRAMMING        PROF. AUCIELLO
    input-formatting-output-functions

    

	Topics:
		1.    data types (int, float, etc)
                2.    "+" as catenator
                3.    inputting variables
        	4.    System.out.println()
                   -- prints to standard system output
                      screen, log file, etc.

 Java Integer Types:
   byte          8 bits
   short        16 bits
   int          32 bits
   long         64 bits



types of variables to be read:

     readInt            int
     readDouble         float
     readString         string
     readWord           reads string until a space is encountered

     

OUTPUT:

C:\CoreJavaBook>java  javapr03
Enter Integer (no dec. points) for x:  15
Enter Integer value            for y:  4
x is 15, y is 4
x + y = 19
x - y = 11
x / y = 3
x % y = 3
x * y = 60


Enter Floating Point Number (has dec. points) for a:  3.5
Enter FP Number                               for b:  2.5
Unformatted Output:
a is 3.5, b is 2.5
a / b = 1.4
a raised to b = 22.91765149399039

Output using Format.print
a is   3.50  b is   2.50
a / b =   1.40
a raised to b =  22.92


*/           


import corejava.*;
  class javapr03
    { public static void main (String args [])
      {  int x, y;
         double a, b;
 
         x = Console.readInt("Enter Integer (no dec. points) for x: ");
         y = Console.readInt("Enter Integer value            for y: ");

         System.out.println ("x is " + x + ", y is " + y);
	   System.out.println ("x + y = " + (x + y));
	   System.out.println ("x - y = " + (x - y));
	   System.out.println ("x / y = " + (x / y));
         System.out.println ("x % y = " + (x % y));
         System.out.println ("x * y = " + (x * y));
         System.out.println (" ");
         System.out.println (" ");

          
         a = Console.readDouble("Enter Floating Point Number (has dec. points) for a: ");
         b = Console.readDouble("Enter FP Number                               for b: ");

         System.out.println ("Unformatted Output: ");
         System.out.println ("a is " + a + ", b is " + b);
         System.out.println ("a / b = " + (a / b));
         System.out.println ("a raised to b = " + Math.pow(a,b));
         System.out.println (" ");

         System.out.println ("Output using Format.print");
         Format.print(System.out, "a is  %5.2f", a);
         Format.print(System.out, "  b is  %5.2f", b);
         System.out.println (" ");

         System.out.print ("a / b = "); 
         double c = a/b;
         Format.print(System.out, " %5.2f",c);
         System.out.println (" ");

         System.out.print ("a raised to b = ");
// XX    Format.print(System.out, " %5.2f", ____________);
         System.out.println (" ");
      }
    }


/*
// Note:  standard output = System.out.println

/* Questions:  What happened to the decimals points in the
               results using integers?

               Define % function -- tell instructor when you
               figure it out.

               Does 'Format.print' round off at 5 or greater?

               Math.pow(x,y) returns a result of x raised to the y power.
               Insert correct code in line marked "XX" above.




  Q1:   can "public" in  'public class'   be removed?

   public static void main(String[] args)
   public static void main(String args[])  
  Q2:  Which one works?  Try both.   write answer.

             
  Q3:   explain int x,y
                  double a,b

  Q4:   explain the line below.  What 2 actions occur?
        years = Console.readInt ("The number of years: ");

	
  Q5:   Is Math.pow is a library method.  (routine already coded).
       
      Format.print(System.out," With rate %6.3f", 100*y);
      Format.print(System.out," your payment is $%10.2f", payment);
      System.out.println(" ");	        
  Q6:   explain "%6.3f" and 100 * y


  Q7:  explain "$%10.2f"  (note "edit mask" is within literal string.)

  Q8:  why is "System.out.println(" ")"  is necessary.

*/