问题
Sorry to start another of those unanswerable questions on SO, but I'm just curious as to the pros and cons of all the different string types in C++. My particular question is between MFC's CStrings and std::string (since I'm doing Windows only software), but this would extend to any of the string formats in C++. What do you all thing is the best string type to use in C++ and why?
UPDATE: I actually found a duplicate question. Thanks to those who already answered. Please direct any new responses to this other question: How do you handle strings in C++?
回答1:
When in Rome, do as the Romans do. If you're using MFC, use CString because the classes are all optimized for it. Anything else, use std::string, because it's the standard and you'll find the experience useful in other contexts.
回答2:
std::string
- It's part of the STL
- It's portable.
- Used correctly it can be as efficient as c-strings
- It's safer than c-strings.
回答3:
To summarize...
std::string Pros:
- Portable
- STL & Boost Algorithm Support
- Safer than CStrings
std::string Cons:
- Conversion to CString for MFC could be slower
CString Pros:
- MFC functions optimized for CString
CString Cons:
- Not Portable
- No Boost or STL Algorithm Support
回答4:
std::string can be manipulated by boost string algorithms in addition to the ones in STL. For me the support libraries for std::string just beat MFC hands down.
回答5:
Most of the problems with c++ string types come from one or another string type requiring too large a memory overhead. That said, it also can become onerous if you have to convert from one string type to another. If you are building a large app, I suggest having a policy on which strings to use.
来源：https://stackoverflow.com/questions/485654/pros-and-cons-of-different-string-types-in-c