Final exam for CIS 67, Spring 97	Name: _______________________

Answer questions 1 - 7 for array scores and happy declared as:

    int scores[10], happy[20];

1.  Show the values of the first and last elements of array scores and 
happy after the loop below executes.

   for (int i = 0, i < 10; i++) {
      scores[i] = i * i;   happy[i + 10] = scores[i]; }

	scores[0] is _____	scores[9] is ____
	happy[0] is _____	happy[19] is ____

2.  Assume the elements of array scores contain increasing multiples 
of 10, starting with 10 in scores[0], 20 in scores[1], and so on. What 
is displayed by the following code fragment:

 	index = -1;
	mystery = 50;
	for (int i = 0; i < 10; i++)
   		if (scores[i] == mystery)
      			index = i;
	cout << index << endl;


3.  What is displayed if the second line is replaced by mystery = 55;


4.  What is displayed if the condition is changed to: (scores[i] >= 
mystery) and the second line is unchanged?


5.  How many comparisons would be performed in a selection sort of 
array scores as described in question 2?

Selection sort:  comparisons ____________

6.  You have a function named switch_array with the following 
description and prototype:

	// Exchanges the values stored in its 2 array arguments.
	void switch_array (int a_1[], int a_2[]);

What additional argument(s) does function switch_array need to do 
its job correctly?


7.  Given the above prototype for switch_array, write a function call 
that passes arrays scores and happy as actual arguments to function 
switch_array.


Answer questions 8 - 11 assuming the declarations below.

	struct person {
		string name;
		int dependents;
		int age;
	};
	person me, you;

8.  Write a statement that increases the dependents field of me by 1.


9.(True/False)  The statement you = me; copies all data in variable 
me to you.
  (True/False)  The condition (you == me) is true if corresponding 
fields of
			 variables me and you contain the same data.

10.  Write a function called is_older that returns true if the person 
represented by its first argument (struct type person) is older than 
the person represented by its second argument (same type).






11.  Write a loop that changes the data in the name field of me to all 
uppercase letters. 





12.  Now assume that person is a class with the same data members 
as struct person. Complete the public part of the class definition 
below. Assume the function increment_age always adds 1 to age and 
increase_dependents adds to dependents an amount which is passed 
as an argument. Function make_name_uppercase converts the name 
field to all uppercase characters.

	public:
		____________				// constructor
		______ increment_age ____________
		______ increase_dependents ___________
		______ make_name_uppercase ___________
		______ read_person ____________
		______ write_person ____________
	// accessor functions:
		_______   _____________
		_______   _____________
		_______   _____________

For questions 13 to 15, assume that function main has the 
declarations:

	person me, you;
	int babies;

13.  Write a statement for function main that increases the 
dependents field of you by the value of babies.


14.  Write a statement for function main that changes the name field 
of me to all uppercase characters.


15.  Write a function called is_older that returns true if the person 
represented by its first argument (class type person) is older than 
the person represented by its second argument (same type). 
Assume is_older is not a member function of class person.







16.  Declare a struct type group_s with an array field persons that 
can store up to 100 objects of type person. The struct type group_s 
should also have an integer field that represents the actual size of 
the array (the number of person objects currently stored).






17.  Assume function main declares a variable my_class of type 
group_s. Write statements to increment by 1 the age field of every 
person in my_class whose name field has the same value as 
your_name (a string variable).







18.  Program:  Write member functions person, increment_age, 
increase_dependents, and get_name for class person.