什么是在的malloc（0）的点？ [英] what's the point in malloc(0)?

问题描述

刚看到这个 code：

artist = (char *) malloc(0);

和我想知道为什么有人这样做？

and I was wondering why would one do this?

推荐答案

根据规格，的malloc（ 0）将返回要么一个空指针或一个独特的指针可以成功地传递给free（）。​​

According to the specifications, malloc(0) will return either "a null pointer or a unique pointer that can be successfully passed to free()".

这基本上让你分配什么，但仍然是艺术家变量传递给调用free（）无后顾之忧。出于实用的目的，这是pretty一样一样做的：

This basically lets you allocate nothing, but still pass the "artist" variable to a call to free() without worry. For practical purposes, it's pretty much the same as doing:

artist = NULL;

这篇关于什么是在的malloc（0）的点？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！