使用的realloc与自由之间的差异 - ＆GT;的malloc函数 [英] Differences between using realloc vs. free -> malloc functions

问题描述

为什么一个会用realloc（）的函数来调整一个动态分配的数组，而不是使用free（）函数再次调用malloc的（）函数（即利弊，优势劣势对比等）之前？这对C语言编程，但我不能找到合适的标签吧。先谢谢了。

Why would one use realloc() function to resize an dynamically allocated array rather than using free() function before calling the malloc() function again (i.e. pros and cons, advantages vs. disadvantages, etc.)? It's for C programming, but I can't find the proper tag for it. Thanks in advance.

推荐答案

的优点是，下realloc将preserve存储器中的内容。随着免费+的malloc你需要在数组中的数据重置。

The advantage is that realloc will preserve the contents of the memory. With free + malloc you'd need to reset the data in the array.

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