read()

描述

從檔案讀取資料。

read() 是從 Stream 繼承而來。

語法


file.read()

參數

file:被 SD.open() 回傳的 File 物件

回傳

byte:回傳檔案未讀資料中最前面的字元,如果沒有未讀資料可以讀回傳 -1

See Also

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


函式庫參考主頁面

The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.