爲什麼叫ifstream和ofstream

原創 不吹牛不睡觉 2020-02-21 23:11

iftream是讀文件，而用的“i”，是in的意思，明明是進入的意思，怎麼和讀取有關係呢？

oftream是讀文件，而用的“o”，是out的意思，明明是出去的意思，怎麼和寫入有關係呢？

反正我是很費解。

其實是我們沒有想對例子。

in是說，由硬盤 “進入” 內存，這個進入是讀取的過程，所以叫做in

out是說，“移出”內存到硬盤，這是個寫到硬盤的過程，所以叫做out

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