Midterm Examination
                                      CS 141
                               Thursday, November 13, 1997



This is a closed-book, closed-notes examination.  There are five
problems.  Do not spend too much time on any problem. Read them 
all through first and solve them in the order that allows you to 
make the most progress.  

For most of the problems, you need to write a program or
a function.  You do not need to write comments, function
prototypes, or include statements.  Your program doesn't
have to be fancy or user-friendly.  You should make it as simple as
possible, as long as it does what is required.  


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Problem 1 (20 points):  

Write a function called same_a, which takes two arrays of 
integers and an integer as input.  Each array represents
the scores of a person on each test of the semester in some 
course.  The third argument is the number of test scores in 
each array.  The function should return true if the two people
got A on the same tests.  (Note:  A is 90 or above)

Example 1
---------
Suppose the first array contains:	93  83  72  90  88 100
Suppose the second array contains:	99  42  75 100  42  94

Then the function returns true.

Example 2
---------
Suppose the first array contains:	93  83  72  90  88 100
Suppose the second array contains:	80  42  75 100  42  94

Then the function returns false.

Example 3
---------
Suppose the first array contains:	93  83  72  75  88 100
Suppose the second array contains:	80  42  75 100  42  94

Then the function returns false.


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Problem 2 (20 points):  

Write a class called person with a data field for first name,
a data field for last name, and a data field indicating if the
person is married or not.

Write a member function called get_married which takes another 
person as input.  The function should give this other person 
the same last name as the person used to call the function, 
and change the marital status of both persons.

As usual the class should contain the function prototype.
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Problem 3 (20 points):  

Write a function called same_nums which takes two input streams
as input.  The function assumes that those input streams are
each already associated to a file of integers.  The function 
should return true if the files are the same (meaning that they
contain the same integers in the same order).  Otherwise,
return false.

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Problem 4 (20 points):  

Write a function called c_follows_b that takes a string as input 
and returns the number of times that b is immediately followed
by c in the string.

Example
-------
Suppose the string is:	abcbabbcabcbc
Then the function will return 4.


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Problem 5 (20 points):  

A.  Write a program to print 100 random numbers between 40 and 50
(inclusive).


B.  What is the output of the following program:

	void main()
	{
	  char s[20];
	  strcpy (s,"abcdefg");
	  s[strlen(s)/2] = '\0';
	  cout << s << "\n";
	}

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