Function Activity

In this activity we will explore a number of ideas related to functions. As you proceed through this activity please open this document. It contains questions for you to answer as you complete the activity. When you are finished, email a copy of the final document to your instructor.

Reference Parameters

Questions in this section are based on this code. You should download the code, examine it and run it.

Question 1B explores the impact of pass by reference. Answer this question using the following code

   int a;

   //start of question1B code.
   a = 5;
   cout << "Before the call, a = " << a << endl;
   Function1(a);
   cout << "After the first call, a = " << a << endl;
   Function2(a);
   cout << "After the second call, a = " << a << endl;

   // end of question1B code.

Uncomment the code in this section. Answer question 1C.


   // start of question 1C
   
   // Function1(5);
   // Function2(5);

   // end of question 1C

If you are struggling with this answer, consider the following code:
```
    5 = -99
```
You may also wish to review page 371 and 372
Remove the code which will not compile.

Finally uncomment the code in this section and attempt to compile the code. Answer question 1D. You may wish to review your text on page 364.

   // start of question 1D

   // b = 3.998;
   // Function1(b);
   // Function2(b);
   // cout << "After the second call, b = " << b << endl;

   // end of question 1D

Scope
- Download this code.
- Examine, compile and execute the code.
- Answer all parts of question 2.
- Download this code
- This code illustrates a somewhat common practice of declaring a loop control variable as part of a for loop. This is not the best practice, but you will encounter this type of code.
- Examine, compile and execute the code.
- Answer question 3A.
- Uncomment the last line of the code and answer questions 3B-C.
Lifetime.
- Download this code.
- Examine, compile and execute the code.
- Answer questions 4A-C