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Exam 6: Functions

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Question 1

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

A) main function
B) stub
C) driver
D) overloaded function

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B

Question 2

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A parameter is a special-purpose variable that is declared inside the parentheses of a function definition.

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Question 3

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

Local variables are initialized to zero by default.

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

Given the following function definition void calc (int a, int& b) { $\quad$ int c; $\quad$ c = a + 2; $\quad$ a = a * 3; $\quad$ b = c + a; } What is the output of the following code fragment that invokes calc? (All variables are of type int) x = 1; y = 2; z = 3; Calc(x, y) ; Cout << x << " " << y << " " << z << endl;

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

This is a collection of statements that performs a specific task.

A function can have zero to many parameters, and it can return this many values.

A function is executed when it is

A(n) _________ argument is passed to a parameter when the actual argument is left out of the function call.

This statement causes a function to end.

You may use the exit() function to terminate a program, regardless of which control mechanism is executing.

A function's return data type must be the same as the function's parameter(s).

Look at the following function prototype. int myFunction(double) ; What is the data type of the funtion's parameter variable?

_________ functions may have the same name, as long as their parameter lists are different.

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; }

Here is the header for a function named computeValue: void computeValue(int value) Which of the following is a valid call to the function?

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

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