Is there a reason why zero is used as a "default" function return value? I noticed that several functions from the stdlib and almost everywhere else, when not returning a proper number (e.g pow(), strcpy()) or an error (negative numbers), simply return zero.Is there a reason why zero is used as a "defaul
阅读背景：
在C/ c++中，返回0作为默认值的基本原理
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