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Exam 6: Functions

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Question 1

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Given the following header for a function named computeValue, which of the following is a valid call to the function? Void computeValue(int value)

A) computeValue(10)
B) computeValue(10) ;
C) void computeValue(10) ;
D) void computeValue(int x) ;

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Question 2

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Local variables are initialized to zero by default.

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Question 3

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A __________ argument is passed to a parameter when the actual argument is left out of the function.

What will the following code display? #include <iostream> using namespace std; void doSomething(int) ; int main() { $\quad$ int x = 2; $\quad$ cout << x << endl; $\quad$ doSomething(x) ; $\quad$ cout << x << endl; return 0; } void doSomething(int num) { $\quad$ num = 0; $\quad$ cout << num << endl; }

This statement causes a function to end.

In the following function prototype, how many parameter variables does this function have? Int myFunction(double, double, double) ;

What will the following code display? #include <iostream> using namespace std; void doSomething(int&) ; int main() { $\quad$ int x = 2; $\quad$ cout << x << endl; $\quad$ doSomething(x) ; $\quad$ cout << x << endl; $\quad$ return 0; } void doSomething(int& num) { $\quad$ num = 0; $\quad$ cout << num << endl; }

A function _________ eliminates the need to place a function definition before all calls to the function.

It is possible for a function to have some parameters with default arguments and some without.

It is not considered good programming practice to declare all your variables globally.

What is the data type of the following function prototype's return value? Int myFunction(double) ;

You must always furnish an argument with a function call.

Select all that apply. Which of the following statement(s) about global variables is(are) true?

Functions are ideal for menu-driven programs. When the user selects a menu item, the program can __________ the appropriate function.

What will the following code display? #include <iostream> using namespace std; int getValue(int) ; int main() { $\quad$ int x = 2; $\quad$ cout << getValue(x) << endl; $\quad$ return 0; } int getValue(int num) { $\quad$ return num + 5; }

This is a dummy function that is called instead of the actual function it represents:

The value in this type of variable persists between function calls.

A(n) __________ is information that is passed to a function, and a(n) __________ is information that is received by a function.

A collection of statements that performs a specific task is a(n)

If a function is called more than once in a program, the values stored in the function's local variables do not _________ between function calls.