如何使用strtok的标记化对一个const char *？ [英] How to use Strtok for tokenizing a Const char*?

问题描述

我有一个const char *变量，它可能像一个值的OpenStack：OpenStack1。我想用的strtok所在的分隔符（这是一个const char *类型）是来标记这个为const char *：。但问题是strtok的是以下类型：
字符* strtok的（字符*海峡，为const char *分隔符）;

I have a const char* variable which may have a value like "OpenStack:OpenStack1". I want to tokenize this const char* using strtok where the delimiter(which is of a const char* type) is ":" . But the problem is strtok is of following type: char * strtok ( char * str, const char * delimiters );

这意味着我不能用为const char *第一个输入的，因为它有是char *。你可以说我，我怎么能这样为const char *转换成char *？

Which means I can't use const char* for the first input as it has to be char*. Could you say me how I can convert this const char* into char*?

感谢您。

推荐答案

由于strtok的实际写入到您的字符串，你需要做一个写副本的它记号化;

Since strtok actually writes to your string, you need to make a writable copy of it to tokenize;

char* copy = strdup(myReadonlyString);
...tokenize copy...
free(copy);

这篇关于如何使用strtok的标记化对一个const char *？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！