Chapter 6 C++

What is the output of the following program? #include <iostream> using namespace std; void doSomething (int); int main() { int x =2; cout <<x<< endl; doSomething (x); cout << x<< endl; return 0; } void doSomething (int num) { num=0; cout <<num<<endl; }

2 0 2

What is the output of the following program? #include <iostream> using namespace std; void showDub(int); int main () { int x=2; showDub (x); cout <<x<< endl; return0; } void showDub(int num) { cout << (num * 2) << endl; }

4 2

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

EXIT_SUCCESS

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

Two or more

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

definition

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

document

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

exit( )

This is a statement that causes a function to execute.

function call

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.

persist

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

prototype

The value in a(n) ________ variable persists between function calls.

static local

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

only one

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

3

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

default

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

header

A function is executed when it is:

called

What is the output of the following program? #include <iostream> using namespace std; void doSomething (int&); int main ( ) { int x = 2; cout <<x<<endl; doSomething (x); cout << x<< endl; return 0; } void doSomething (int& num) { num =0; cout << num<< endl; }

2 0 0

A ________ variable is declared outside all functions.

global

In a function header, you must furnish: 1) data types of the parameters 2) the name of function 3) names of parameter variables 4) data type of the return value 5) all of these

all of these

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

default

Given the following function definition coid calc (int a, in& b) { int c; c = a + 2; a = a * 3; b = c + a; } What is the output of the following code fragment that invokes calc? (all variables are of types int) x=1; y =2; z=3; calc (x,y); cout << x<< " " << y << " " << z << endl;

1 6 3

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

10

What is the output of the following program? #include <iostream> using namespace std; int getValue (int); int main() { int x= 2; cout<< getValue (x)<< endl; return 0; } int getValue (int num) { return num +5; }

7

Which of the following statements about global variables is true?

A global variable can have the same name as a variable that is declared locally within a function.

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

argument, parameter

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

double