ADT of class ClassHistorgram

methods:

main
PRECONDITION:	none
INPUT:		array of Strings (not used)
PROCESS:	It creates the array of 10 integers for score.  It then asks
		the user how many scores there will be in this  class of 
		students.  If a negative number is given, it notifies the user 
		and re-asks for the number of students.  Next, it ask whether
		the user wants to input the numbers or have the computer
		randomly generate the numbers.  It then calls the appropriate
		method of generateRandom or generateInput depending on what the
		user has called.  It then calls outputHistogram to generate the
		histogram of scores.  It keeps on doing this until the user 
		wants to terminate. 
OUTPUT:		none
POSTCONDITION:  score and generator are created.

generateRandom
PRECONDITION:	none
INPUT:		int n, number of inputs 
PROCESS:	It initializes the array of scores to be zero. It creates
		an object of the Random number generator.  It then goes
		through a for loop generating n numbers from 1 to 100. It 
		increments the proper index of score depending on the number
		generated. It uses the Gaussian distribution to generate the
		numbers.
OUTPUT:		int [] the array of scores
POSTCONDITION:	The values of score have been modified

generateUser
PRECONDITION:	none
INPUT:		int n, number of inputs
PROCESS:	It asks the user for a number from 1 to 100 n times. If the 
		user gives a number not in the desired range, it is rejected and
		the user is asked to resubmit the value.  It increments the
		proper index of score depending on the number input.
OUTPUT:		int [] the array of scores
POSTCONDITION:	The values of score have been modified

outputHistogram
PRECONDITION:	Either generateRandom or generateUser have already been called.
INPUT:		int [] scores, the array of scores
PROCESS:	It generates the output as a bar graph for the values of score.
		Each value of the index of score generates a line of output,
		with one '*' for each value of that value of the index.  Each
		line has a header indicating the value of the range.
OUTPUT:		none
POSTCONDITION:	none