超星 - Quiz for Unit5.3

单选题

Select a proper sentinel value if we want users to enter students’ grades.

A. 0
B. 10
C. 100
D. -1

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单选题

How to enter the EOF mark?

A. Press Ctrl+Z (in Windows) or Ctrl+D (Mac/Linux).
B. Enter “EOF” in the terminal.
C. Enter “^Z” or “^D”.

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单选题

On success, the scanf() function will return _____.

A. The length of the input string.
B. The number of input characters.
C. The number of input items successfully processed.
D. The number of total items presented in the control sequence.

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多选题

The continue statement can be used within ( ) statements.

A. if
B. do
C. do-while
D. for

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判断题

When the number of data items to input cannot be determined in advance, we can use the sentinels to signal the end of a data series.

A. 对
B. 错

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判断题

The sentinels should not conflict with legitimate data values.

A. 对
B. 错

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判断题

We can capture the EOF mark with the scanf() function.

A. 对
B. 错

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