Chapter 5

Question 1

[Blank] are C++ operators the change their operands by one.

Answer 1

++ and –

Question 2

True/False: To decrement a number means to increase its value.

Answer 2

False

Question 3

The ++ operator

Answer 3

Is a unary operator, adds one the the value of its operand, and can operate in prefix or postfix mode.

Question 4

What will the following code print?
num = 8;
cout &laquo_space;–num &laquo_space;” “;
cout &laquo_space;num++ &laquo_space;” “;
cout &laquo_space;num;

Answer 4

7 7 8

Question 5

The while loop has two important parts: a condition that is tested and a statement or block of statements that is …

Answer 5

repeated as long as the condition is true.

Question 6

True/False: The block of code in the body of a while statement can contain an unlimited number of statements, provided they are enclosed in a set of braces.

Answer 6

True

Question 7

True/False: A while loop may have a semicolon after the test expression and before the body of the loop, but it is not required.

Answer 7

False

Question 8

True/False: A while loop is somewhat limited, because the counter can only count up, not down.

Answer 8

False

Question 9

The while loop is a(n) [Blank] loop, where as the do-while loop is a(n) [Blank] loop.

Answer 9

pretest, post test

Question 10

The statements in the body of a do-while loop are executed …

Answer 10

at least once

Question 11

A sentinel is a special value that …

Answer 11

marks the end of a list of values

Question 12

A for statement contains three expressions: initialization, test, and …

Answer 12

update

Question 13

In a for statement, the [Blank] expression is executed only once.

Answer 13

initialization

Question 14

True/False: An initialization expression may be omitted from the for loop if no initialization is required.

Answer 14

True

Question 15

You may define a(n) [Blank] in the initialization expression of a for loop.

Answer 15

variable

Question 16

True/False: When a loop is nested inside another loop the outer loop goes through all its iterations for each iteration of the inner loop.

Answer 16

False

Question 17

A variable that keeps a running total of data values is called a(n) …

Answer 17

accumulator

Question 18

For data validation, it is best to use a(n) …

Answer 18

while loop

Question 19

To use files in a C++ program you must included the [Blank] header file

Answer 19

fstream

Question 20

To use an output fie in a C++ program you must …

Answer 20

create a file stream object that will “point to”(i.e. reference) the file and open the file