file.peek()

[SD]

描述

Read a byte from the file without advancing to the next one. That is, successive calls to peek() will return the same value, as will the next call to read().

peek() inherits from the Stream utility class.

語法

file.peek()

參數

file: an instance of the File class (returned by SD.open())

回傳

The next byte (or character), or -1 if none is available.

也可以看看

• available()
• read()
• write()
• Stream.peek()

函式庫參考主頁面

86Duino 參考的文本是根據 Creative Commons Attribution-ShareAlike 3.0 License，部分文本是從 the Arduino reference 修改的。 參考中的代碼示例已發佈到公共領域。