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EntityQ580748· pop 9· linked from 13 articles

Include防範

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Also known as macro guard, include guard, header guard

construct in C and C++ for idempotent header inclusion

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replaced by
#pragma once
has effect
idempotence
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Article · 中文

在C和C++程式語言中,#include防範,有時被稱作巨集防範,用於處理#include 時,可避免重複引入的問題。在標頭檔加入#include防範是一種讓檔案等冪的方法。

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