Modify a text file: $/skeleton/quiz2.html

$/skeleton/quiz2.html

<UL>
		<LI> Begin with the sample code in the "q2: Quiz #2" assignment on REPL.IT
		
		<LI> Modify this Java code in class, and submit it via REPL.IT
		 (Before submitting your code, all
		 <BIG>+++++</BIG> 
			 comments should be removed.) 
		
		<LI> Improve your code at home, and resubmit it as "22: Redo #2", by Friday
		 (For the "Redo", all optional requirements are mandatory.)
		
		<LI> Avoid writing unnecessary code.
		 If there is a already a method to calculate something, use it!
	</UL>

<HR>

<H3>
Write Java code for these new methods:
</H3>

<DL>
<DT> <TT>factorial( int n )</TT>
	<DD> returns n!, the factorial of its argument. 
	 (If n is 5, then n! = 5 * 4 * 3 * 2 * 1 == 120 ; note that 1! is 1 and 0! is 1).

<DT> <TT>sumDig( int n )</TT>
	<DD> returns the sum of the digits.
	 <TT> sumDig( 11901 ) returns 12</TT>

<DT> <TT>isMult( int, int )</TT>
	<DD> returns true iff the first argument is a multiple of the second argument.
	 <TT> isMult( 51, 17 ) returns true</TT>

<DT> <TT>isVowel( char )</TT>
	<DD> returns true iff the argument is a vowel [aeiouAEIOU]
	 <TT> 
		isVowel( 'E' ) returns true;
		isVowel( 'j' ) returns false;
	</TT>

<DT> <TT>isConsonant( char )</TT>
	<DD> returns true iff the argument is a letter, but NOT a vowel.
	 Be sure to use library functions
	such as <TT>toUpper</TT>,
	and <TT>isLetter</TT>,

</DL>

<HR>

<H3>
In the main() method, add code to do the following tasks.
 
</H3><PRE><TT> // Note that these tasks are also described in comments within the main() method:

 // TASK 1. Count the number of consonants in each String (firstName and lastName),
 // 	then print a message saying which one (if any) has more of them.
		
 // TASK 2. Check whether area code has exactly three digits; print error message if not.
 // 	Check whether zipcode has exactly five digits; print error message if not.
 	
 // TASK 3. Check to see if each number (zipCode and areaCode) is divisible by
 // 	any of the first six primes (2, 3, 5, 7, 11, 13).

// TASK 4. Calculate and print the factorials of the numbers one to twelve.
 // 	(12! == 479,001,600)
	
 // TASK 5. Prompt the user to enter a password; check if it follows these rules:.
 // 	-- between five and fifteen characters long.
 // 	-- exactly three digit characterss.
 // 	-- more consonats than vowels.
 // 	-- at least one character that is not a letter or number.

// OPTIONAL: Instead of writing code here (in main), 
		// OPTIONAL: write a separate method for each of the above
		// OPTIONAL: and call it with appropriate arguments.
</TT></PRE>

<HR>

<H3>
Add code to the 
<TT>main( )</TT>
method, to calculate the following:
</H3>

<UL>

<DT> <TT>answer1</TT>
	<DD> is the largest square that is less than the value of the zip code.
	 (For zip code 11784, it is 108; for 11901, it is 109.)

<DT> <TT>answer2</TT>
	<DD> is the sum of the factorials of each of the five digits [0-9] of the zip code.

<DT> <TT>answer3</TT>
	<DD> the number of degrees in the angle 
			between 5-side (hypotenuse) and the 3-side,
			in a 3-4-5 right triangle.

<DT> <TT>answer4</TT>
	<DD> is the length of the hypotenuse of a right triangle whose sides have lengths equal to the zip code and the area code.
	Using the Pythagorean Theorem, 
	just add the squares of each side,
	then take the square-root.
	 (For zip code 11717 and area code 631, answer5 is approximately 11801.)

<DT> <TT>answer5</TT>
	<DD> Prompt the user to enter non-zero numbers (stopping when a zero is entered), 
	 
	As inputs are read, square each one and add them up, and display the sum of the squares.
	 
	(Extra credit if you can also use this to calculate the standard deviation!)

</UL>
<HR>

For this in-class quiz, 
each of the five tasks and five answers is worth 10 points,
plus or minus 2 for modularity, readbility, and good programming style,
for a maximum of 12.
Therefore, it is possible to earn a grade of "A" by skipping two,
and doing eight of them perfectly!
(On the quiz, quality is far more important than quantity,
so it pays to do well on the ones that you can do!)

On the "redo" however, each is worth a maximum of ten,
and it is necessary to do all to get a good grade.

Also, please note that submitted Java code that has syntax errors and fails to compile
will NOT be graded, and will receive a grade of zero!
 Make sure that your code compiles properly, before submitting it!

<HR>