C++ strcmp 或字符串::比较？
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strcmp or string::compare?
提问by Perex19
I want to compare two strings. Is it possible with strcmp? (I tried and it does not seem to work). Is string::comparea solution?
我想比较两个字符串。有可能strcmp吗？（我试过了，它似乎不起作用）。是string::compare解决方案吗？
Other than this, is there a way to compare a stringto a char?
除此之外，有没有办法将 astring与 a进行比较char？
Thanks for the early comments. I was coding in C++ and yes it was std::stringlike some of you mentioned.
I didn't post the code because I wanted to learn the general knowledge and it is a pretty long code, so it was irrelevant for the question.
感谢您的早期评论。我在用 C++ 编码，是的，std::string就像你们中的一些人提到的那样。我没有发布代码，因为我想学习一般知识，它是一段很长的代码，因此与问题无关。
I think I learned the difference between C++ and C, thanks for pointing that out. And I will try to use overloaded operators now. And by the way string::compareworked too.
我想我了解了 C++ 和 C 之间的区别，感谢您指出这一点。我现在将尝试使用重载运算符。顺便说一句也string::compare奏效了。
回答by Sadique
For C++, use std::stringand compare using string::compare.
对于 C++，使用std::string和比较使用string::compare.
For C use strcmp. If your (i meant your programs) strings (for some weird reason) aren't nulterminated, use strncmpinstead.
对于 C 使用strcmp. 如果您的（我的意思是您的程序）字符串（出于某种奇怪的原因）没有nul终止，请strncmp改用。
But why would someone notuse something as simple as ==for std::string?
但是为什么有人不使用像==for这样简单的东西std::string呢？
回答by Mark B
Assuming you mean std::string, why not use the overloaded operators: str1 == str2, str1 < str2?
假设您的意思是std::string，为什么不使用重载运算符：str1 == str2, str1 < str2？
回答by ildjarn
See std::basic_string::compareand std::basic_stringoperators reference(in particular, there exists operator==, operator!=, operator<, etc.). What else do you need?
见std::basic_string::compare和std::basic_string运营商参考（特别是，存在operator==，operator!=，operator<等等）。你还需要什么？
回答by doron
When using C++ use C++ functions viz. string::compare. When using C and you are forced to use char*for string, use strcmp
使用 C++ 时，请使用 C++ 函数即。string::compare. 当使用 C 并且您被迫使用char*字符串时，请使用strcmp
回答by Pete Wilson
By your question, "is there a way to compare a string to a char?" do you mean "How do I find out if a particular char is contained in a string?" If so, the the C-library function:
通过您的问题，“有没有办法将字符串与字符进行比较？” 你的意思是“我如何找出一个特定的字符是否包含在一个字符串中？” 如果是这样，则 C 库函数：
char *strchr(const char *s, int c);
will do it for you.
会为你做的。
-- pete
——皮特
回答by sehe
std::string can contain (and compare!) embedded null characters.
std::string 可以包含（和比较！）嵌入的空字符。
are*comp(...) will compare c-style strings, comparing up to the first null character (or the specified max nr of bytes/characters)
are*comp(...) 将比较 c 样式的字符串，最多比较第一个空字符（或指定的最大字节数/字符数）
string::compare is actually implemented as a template basic_string so you can expect it to work for other types such as wstring
string::compare 实际上是作为模板 basic_string 实现的，因此您可以期望它适用于其他类型，例如 wstring
On the unclear phrase to "compare a string to a char" you can compare the char to *string.begin() or lookup the first occurrence (string::find_first_of and string::find_first_not_of)
在不清楚的短语“将字符串与字符进行比较”时，您可以将字符与 *string.begin() 进行比较或查找第一次出现（string::find_first_of 和 string::find_first_not_of）
Disclaimer: typed on my HTC, typos reserved :)
免责声明：在我的 HTC 上输入，保留错别字:)
