ANSI C - 清除字符串 [英] ANSI C - Clearing a string

问题描述

我有一个这样声明的字符串:

I've got a string declared like this:

str=malloc(sizeof(char)*128);

我想彻底清除它，这样当我做strncat()操作时，新的字符会被写入str的开头.我需要清除它的原因是我正在用它自己的简化版本(删除多余的空格)来写它.

I want to clear it completely so that whenI do strncat() operation, the new characters will be written to the beginning of str. The reason I need to clear it is that I'm writing over it with a simplified version of itself (deleting excess whitespace).

推荐答案

我建议你这样做:

*str = '';

您不需要清除缓冲区的全部内容.您可以将第一个 char 设置为零，然后您就有了空字符串.

You don't need to clear the entire contents of the buffer. You can just set the first char to zero and then you have the empty string.

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