Sams Teach Yourself C++ in 21 Days

8. The answers are
   a. False
   b. True
   c. True
   d. False
   e. True

Exercises ........................................................................................................

1. The following is one possible answer:
   if (x > y)
   x = y;
   else // y > x || y == x
   y = x;


2. See exercise 3.


3. Entering 20 , 10 , 50 gives back a: 20,b: 30,c: 10.
   Line 14 is assigning, not testing for equality.


4. See Exercise 5.


5. Because line 6 is assigning the value of a-bto c, the value of the assignment is a
   (2) minus b(2), or 0. Because 0 is evaluated as false, the iffails and nothing is
   printed.

Day 5....................................................................................................................

Quiz ................................................................................................................

1. The function prototype declares the function; the definition defines it. The proto-
   type ends with a semicolon; the definition need not. The declaration can include
   the keyword inlineand default values for the parameters; the definition cannot.
   The declaration need not include names for the parameters; the definition must.


2. No. All parameters are identified by position, not name.


3. Declare the function to return void.


4. Any function that does not explicitly declare a return type returns int. You should
   always declare the return type as a matter of good programming practice.


5. A local variable is a variable passed into or declared within a block, typically a
   function. It is visible only within the block.

826 Appendix D

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