CS 150 Chapter 6

If the formal parameter list of a function is empty, the parentheses after the function name are not needed.

False

The execution of a return statement in a user-defined function terminates the program.

False

The following return statement returns the value 10. return 10, 16;

False

The function main is always compiled first, regardless of where in the program the function main is placed.

False

The output of the statement: cout << tolower('$') << endl; is ____.

'$'

Given the following function: int strange(int x, int y) { if (x > y) return x + y; else return x - y; } what is the output of the following statement? cout << strange(4, 5) << endl;

-1

The statement: return 8, 10; returns the value ____.

10

The output of the statement: cout << pow(3.0, 2.0) + 5 << endl; is ____.

14.0

The statement: return 2 * 3 + 1, 1 + 5; returns the value ____.

6

The statement: return 37, y, 2 * 3; returns the value ____.

6

What value is returned by the following return statement? int x = 5; return x + 1;

6

Given the following function: int next(int x) { return (x + 1); } what is the output of the following statement? cout << next(next(5)) << endl;

7

The output of the statement: cout << pow(2.0, pow(3.0, 1.0)) << endl; is ____.

8.0

Assume the following. static_cast<int>('a') = 97 static_cast<int>('A') = 65 The output of the statement: cout << static_cast<int>(tolower('B')) << endl; is ____.

98

To use the predefined function tolower, the program must include the header file ____.

<cctype>

The standard header file for the abs(x)function is ____.

<cmath>

Given the following function prototype: int test(float, char);, which of the following statements is valid? a. cout << test(12, &); b. cout << test("12.0", '&'); c. int u = test(5.0, '*'); d. cout << test('12', '&');

c. int u = test(5.0, '*');

Given the function prototype: float test(int, int, int); which of the following statements is legal? a. cout << test(7, test(14, 23)); b. cout << test(test(7, 14), 23); c. cout << test(14, 23); d. cout << test(7, 14, 23);

d. cout << test(7, 14, 23);

Which of the following function prototypes is valid? a. int funcTest(int x, int y, float z){} b. funcTest(int x, int y, float){}; c. int funcTest(int, int y, float z) d. int funcTest(int, int, float);

d. int funcTest(int, int, float);

The program that tests a function is called a(n) ____________________ program.

driver

A variable listed in a header is known as a(n) ____ parameter.

formal

The heading of the function is also called the ____.

function header

A(n) ____________________ parameter is a formal parameter that receives the location (memory address) of the corresponding actual parameter.

reference

Stream variables (for example, ifstream and ofstream) should be passed by ____________________ to a function.

reference

When you attach & after the dataType in the formal parameter list of a function, the variable following that dataType becomes a(n) ____________________ parameter.

reference

The ____________________ of an identifier refers to where in the program an identifier is accessible (visible).

scope

In C++, :: is called the ____________________.

scope resolution operator

The ____________________ of a function consists of the function name and its formal parameter list.

signature

A variable for which memory remains allocated as long as the program executes is called a(n) ____________________ variable.

static

A function ____________________ is a function that is not fully coded.

stub

A(n) ____________________ parameter s a formal parameter that receives a copy of the content of the corresponding actual parameter.

value

If a formal parameter is a nonconstant reference parameter, during a function call, its corresponding actual parameter must be a(n) ____________________.

variable

Functions that do not have a return type are called ____ functions.

void

If a function needs to return more than one value, as a rule of good programming style, you should change it to a(n) ____________________ function and use the appropriate reference parameters to return the values.

void

____________________ identifiers are not accessible outside of the function (block).

Local

____________________ parameters are useful in three situations: • When the value of the actual parameter needs to be changed • When you want to return more than one value from a function • When passing the address would save memory space and time relative to copying a large amount of data

Reference or reference

Assume that all variables are properly declared. The following statement in a value-returning function is legal. if (x % 2 == 0) return x; else return x + 1;

True

In C++, a function prototype is the function heading without the body of the function.

True

Once you write and properly debug a function, you can use it in the program (or different programs) again and again without having to rewrite the same code repeatedly.

True

The data type of a variable in a return statement must match the function type.

True

The following function heading in a C++ program is valid: int funcExp(int u, char v, float g)

True

Using functions greatly enhances a program's readability because it reduces the complexity of the function main.

True

A function prototype is ____.

a declaration, but not a definition

Given the function prototype: double testAlpha(int u, char v, double t); which of the following statements is legal? a. cout << testAlpha(5, 'A', 2); b. cout << testAlpha( int 5, char 'A', int 2); c. cout << testAlpha('5.0', 'A', '2.0'); d. cout << testAlpha(5.0, "65", 2.0);

a. cout << testAlpha(5, 'A', 2);

Which of the following function prototypes is valid? a. int funcExp(int x, float v); b. funcExp(int x, float v){}; c. funcExp(void); d. int funcExp(x);

a. int funcExp(int x, float v);

A variable or expression listed in a call to a function is called the ____.

actual parameter

A variable for which memory is allocated at block entry and deallocated at block exit is called a(n) ____________________ variable.

automatic

Which statement below about prototypes and headers is true? a. Parameter names must be listed in the prototype, but not necessarily in the header. b. Prototypes end with a semicolon, but headers do not. c. Headers should come before prototypes. d. Headers end with a semicolon, but prototypes do not.

b. Prototypes end with a semicolon, but headers do not.

Given the following function prototype: int myFunc(int, int);, which of the following statements is valid? Assume that all variables are properly declared. a. cin >> myFunc(y); b. cout << myFunc(myFunc(7, 8), 15); c. cin >> myFunc('2', '3'); d. cout << myFunc(myFunc(7), 15);

b. cout << myFunc(myFunc(7, 8), 15);

Given the following function prototype: double tryMe(double, double);, which of the following statements is valid? Assume that all variables are properly declared. a. cin >> tryMe(x); b. cout << tryMe(2.0, 3.0); c. cout << tryMe(tryMe(double, double), double); d. cout << tryMe(tryMe(float, float), float);

b. cout << tryMe(2.0, 3.0);