Hogan Chapter 5

These are operators that add and subtract one from their operands. plus and minus ++ and -- binary and unary conditional and relational

++ and --

What is the output of the following code segment? n = 1; for ( ; n <= 5; ) cout << n << " "; n++; 1 2 3 4 5 1 1 1 ... and on forever 2 3 4 5 6 1 2 3 4 2 3 4 5

1 1 1 ... and on forever

What is the output of the following code segment? n = 1; while (n <= 5) cout << n << ' '; n++; 1 2 3 4 5 1 1 1... and on forever 2 3 4 5 6 1 2 3 4 5 2 3 4 5

1 1 1... and on forever

How many times will the following loop display "Hello"? for (int i = 1; i < 20; i++) cout << "Hello!" << endl; 20 19 21 An infinite number of times

19

How many times will the following loop display "Hello"? for (int i = 0; i < 20; i++) cout << "Hello!" << endl; 20 19 21 An infinite number of times

20

How many times will the following loop display "Hello"? for (int i = 20; i > 0; i--) cout << "Hello!" << endl; 20 19 21 An infinite number of times

20

How many times will the following loop display "Hello"? for (int i = 0; i <= 20; i++) cout << "Hello!" << endl; 20 19 21 An infinite number of times

21

Question 32 0.2 / 0.2 pts What will the following code display? int number = 6 int x = 0; x = --number; cout << x << endl; 6 5 7 0

5

Question 31 0.2 / 0.2 pts What will the following code display? int number = 6; int x = 0; x = number--; cout << x << endl; 6 5 7 0

6

What will the following code display? int number = 6; cout << number++ << endl; 6 5 7 0

6

Question 30 0.2 / 0.2 pts What will the following code display? int number = 6; cout << ++number << endl; 6 5 7 0

7

What will the following code display? int number = 6; ++number; cout << number << endl; 6 5 7 0

7

What will the following code display? int number = 6; number++; cout << number << endl; 6 5 7 0

7

Look at the following statement. while (x++ < 10) Which operator is used first? ++ < Neither. The expression is invalid. No answer text provided.

<

A while loop is somewhat limited, because the counter can only be incremented by one each time through the loop. True False

False

The condition that is tested by a while loop must be enclosed in parentheses and terminated with a semicolon. True False

False

The increment and decrement operators can be used in mathematical expressions; however, they cannot be used in relational expressions. True False

False

The scope of a variable declared in a for loop's initialization expression always extends beyond the body of the loop. True False

False

A while loop's body can contain multiple statements, as long as they are enclosed in braces. True False

True

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

True

An output file is a file that data is written to. True False

True

If you want to stop a loop before it goes through all its iterations, the break statement may be used. True False

True

A loop that is inside another loop is called: an infinite loop a pre-test loop a post-test loop a nested loop

a nested loop

The while loop has two important parts: an expression that is tested for a true or false value, and: a statement or block that is repeated as long as the expression is true a statement or block that is repeated only if the expression is false one line of code that is repeated once, if the expression is true a statement or block that is repeated once, if the expression is true

a statement or block that is repeated as long as the expression is true

What will the following loop display? int x = 0; while (x < 5) { cout << x << endl; x++; } a. 0 c. 01 2 3 4 1 2 3 4 5 b. 0 d. The loop will display numbers 1 starting at 0, for infinity. 2 3 4 a b c d

b

This statement causes a loop to terminate early. stop break null terminate

break

Assuming dataFile is a file stream object, the statement dataFile.close(); is illegal in C++ needs a filename argument to execute correctly closes a file is legal but risks losing valuable data

closes a file

This statement may be used to stop a loop's current iteration and begin the next one. break terminate return continue

continue

This is a variable that is regularly incremented or decremented each time a loop iterates. constant counter control statement null terminator

counter

What will the following code display? int x = 0; for (int count = 0; count < 3; count++) x += count; cout << x << endl; a. 0 c. 6 1 2 b. 0 d. 3 a b c d

d

If you want a user to enter exactly 20 values, which loop would be the best to use? do-while for while infinite

for

This loop is a good choice when you know how many times you want the loop to iterate in advance of entering the loop. do-while while for infinite

for

To allow file access in a program, you must #include this header file. file fileaccess fstream cfil

fstream

This means to increase a value by one. decrement increment modulus parse

increment

Something within a while loop must eventually cause the condition to become false, or a(n) __________ results. null value infinite loop unexpected exit compiler error

infinite loop

The while loop contains an expression that is tested for a true or false value, and a statement or block that is repeated as long as the expression is false is true does not evaluate to true or false evaluates to true or false

is true

This is a control structure that causes a statement or group of statements to repeat. decision statement constant loop cout object

loop

If you place a semicolon after the test expression in a while loop, it is assumed to be a(n): pre-test loop post-test loop null statement infinite loop

null statement

To write data to a file, you define an object of this data type. outputFile ifstream fstream ofstream

ofstream

Assume a file stream object has been created when answering the following question. A file must be ________ to the file stream object before data can be written to or read from it. closed and unlinked opened and linked buffered and attached initialized and introduced

opened and linked

Assuming outFile is a file stream object and number is a variable, which statement writes the contents of number to the file associated with outFile? write(outFile, number); outFile >> number; outFile << number; number >> outFile;

outFile << number;

The do-while loop is a __________ loop that is ideal in situations where you always want the loop to iterate at least once. post-test pre-test infinite null-terminated

post-test

The do-while loop is considered a(n) _________ loop. pre-test post-test infinite limited

post-test

The while loop is this type of loop? post-test pre-test infinite limited

pre-test

When the increment operator precedes its operand, as in ++num1, the expression is in this mode. postfix prefix preliminary binary

prefix

When used as part of an expression and/or in an assignment operation this operator increments the value of its operand before the operand is used in the expression, or assignment operation. prefix increment postfix increment prefix decrement postfix decrement

prefix increment

This is a special value that marks the end of a list of values. constant variable loop sentinel

sentinel

A for statement contains three expressions: initialization, test, and update reversal null validation

update

You may define a __________ in the initialization expression of a for loop. constant function variable new data type

variable

This is a pre-test loop that is ideal in situations where you do not want the loop to iterate if the condition is false from the beginning. do-while while for infinite

while