This chapter is from the book
This chapter is from the book
This chapter is from the book
Questions
Answers to these questions can be found in Appendix G.
A relational operator
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assigns one operand to another.
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yields a Boolean result.
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compares two operands.
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logically combines two operands.
Write an expression that uses a relational operator to return true if the variable george is not equal to sally.
Is –1 true or false?
Name and describe the usual purpose of three expressions in a for statement.
In a for loop with a multistatement loop body, semicolons should appear following
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the for statement itself.
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the closing brace in a multistatement loop body.
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each statement within the loop body.
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the test expression.
True or false: The increment expression in a for loop can decrement the loop variable.
Write a for loop that displays the numbers from 100 to 110.
A block of code is delimited by ________________.
A variable defined within a block is visible
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from the point of definition onward in the program.
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from the point of definition onward in the function.
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from the point of definition onward in the block.
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throughout the function.
Write a while loop that displays the numbers from 100 to 110.
True or false: Relational operators have a higher precedence than arithmetic operators.
How many times is the loop body executed in a do loop?
Write a do loop that displays the numbers from 100 to 110.
Write an if statement that prints Yes if a variable age is greater than 21.
The library function exit() causes an exit from
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the loop in which it occurs.
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the block in which it occurs.
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the function in which it occurs.
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the program in which it occurs.
Write an if...else statement that displays Yes if a variable age is greater than 21, and displays No otherwise.
The getche() library function
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returns a character when any key is pressed.
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returns a character when Enter is pressed.
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displays a character on the screen when any key is pressed.
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does not display a character on the screen.
What is the character obtained from cin when the user presses the Enter key?
An else always matches the _________ if, unless the if is _________.
The else...if construction is obtained from a nested if...else by ________________.
Write a switch statement that prints Yes if a variable ch is 'y', prints No if ch is 'n', and prints Unknown response otherwise.
Write a statement that uses a conditional operator to set ticket to 1 if speed is greater than 55, and to 0 otherwise.
The && and || operators
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compare two numeric values.
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combine two numeric values.
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compare two Boolean values.
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combine two Boolean values.
Write an expression involving a logical operator that is true if limit is 55 and speed is greater than 55.
Arrange in order of precedence (highest first) the following kinds of operators: logical, unary, arithmetic, assignment, relational, conditional.
The break statement causes an exit
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only from the innermost loop.
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only from the innermost switch.
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from all loops and switches.
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from the innermost loop or switch.
Executing the continue operator from within a loop causes control to go to ________.
The goto statement causes control to go to
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an operator.
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a label.
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a variable.
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a function.