Programs using Printf

Link to printf notes

MyPrintf.java I especially want you to do #3 below.

Write a program that does the following:

1. Print 1/7 to five decimal places
   The output should be 0.14285. (Is it rounded up to 0.14286 as it should be?)
2. Use printf to print the following:

   "The cow's name is Bessy, she is brown and weighs 1200 kg."

   • BUT you need to use these variables in the output string:

     String name = "Bessy";
     String colour = "brown";
     int weight = 1200;

   • Thus if you were using System.out.print() you would write:

     System.out.print("The cow's name is " + name + ", she is " + colour + " and weighs " + weight +" kg.");

   • Do this using printf()
      
3. Print numbers so that they are always 8 characters wide (with vertical bars on each side):
   • use a console font (non-proportional spaced) or it won't work
   • Here I am printing the number 123
     e.g. begin like this:

     int xx = 123;
     System.out.println("| 12345678 |");
     System.out.println("| ======== |");
     System.out.printf("| %8d |%n", xx);

   • You need to make your program print the following USING PRINTF CORRECTLY (the first 3 lines are done by the code above):

     | 12345678 |
     | ======== |
     |      123 | space padded
     | 00000123 | zero padded
     |     +123 | sign always included
     | 123      | left aligned
     |    123.0 | 1 decimal place <--- HERE YOU HAVE TO MAKE THE NUMBER A DOUBLE FOR IT TO WORK.
     			 so use %f instead of %d, and instead of xx, use (double)xx
     

   • To make sure that it's correct, make just one change: change xx to a number with more or fewer digits
     e.g. int xx = 4422; or int xx = 9;.
     Don't change anything else in the program and all of the vertical bars should still line up.