Exam 6: Functions

When used as parameters, these types of variables allow a function to access the parameter's original argument.

This is a statement that causes a function to execute.

Look at the following function prototype. int myFunction(double, double, double); How many parameter variables does this function have?

It is a good programming practice to ____________ your functions by writing comments that describe what they do.

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.

What is the output of the following program? #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; }

Which line in the following program contains the header for the showDub function? 1 $\quad$ #include <iostream> 2 $\quad$ using namespace std; 3 4 $\quad$ void showDub(int); 5 6 $\quad$ int main() 7 $\quad$ { 8 $\quad$$\quad$ int x = 2; 9 10 $\quad$$\quad$ showDub(x); 11 $\quad$$\quad$ cout << x << endl; 12 $\quad$$\quad$ return 0; 13 $\quad$ } 14 15 $\quad$ void showDub(int num) 16 $\quad$ { 17 $\quad$$\quad$ cout << (num * 2) << endl; 18 $\quad$ }

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

A ___________ variable is declared outside all functions.

Global variables are initialized to zero by default.

This type of variable is defined inside a function and is not accessible outside the function.

You must furnish an argument with a function call.

When a function is called, flow of control moves to the function's prototype.

These types of arguments are passed to parameters automatically if no argument is provided in the function call.

One reason for using functions is to break programs into manageable units, or modules.

If a function does not have a prototype, default arguments may be specified in the function ___________.

This function causes a program to terminate, regardless of which function or control mechanism is executing.

Which line in the following program contains a call to the showDub function? 1 $\quad$ #include <iostream> 2 $\quad$ using namespace std; 3 4 $\quad$ void showDub(int); 5 6 $\quad$ int main() 7 $\quad$ { 8 $\quad$$\quad$ int x = 2; 9 10 $\quad$$\quad$ showDub(x); 11 $\quad$$\quad$ cout << x << endl; 12 $\quad$$\quad$ return 0; 13 $\quad$ } 14 15 $\quad$ void showDub(int num) 16 $\quad$ { 17 $\quad$$\quad$ cout << (num * 2) << endl; 18 $\quad$ }

A function __________ contains the statements that make up the function.

EXIT_FAILURE and __________ are named constants that may be used to indicate success or failure when the exit() function is called.