• Constructor > CStringCreate
• Destructor > CStringDestroy
• std::string::operator= > CStringEqual
• std::string::at > CStringAt
• std::string::length > CStringLength
• std::string::size > CStringSize
• std::string::capacity > CStringCapacity
• std::string::data > CStringData
• std::string::empty > CStringEmpty
• std::string::begin > CStringBegin
• std::string::end > CStringEnd
• std::string::rbegin > CStringRBegin
• std::string::rend > CStringREnd
• std::string::front > CStringFront
• std::string::back > CStringBack
• std::string::max_size > CStringMaxSize
• std::string::reserve > CStringReserve
• std::string::shrink_to_fit > CStringShrinkToFit
• std::string::insert > CStringInsert
• std::string::erase > CStringErase
• std::string::push_back > CStringPushBack
• std::string::pop_back > CStringPopBack
• std::string::append > CStringAppend
• std::string::compare > CStringCompare
• std::string::starts_with > CStringStartsWith
• std::string::ends_with > CStringEndsWith
• std::string::replace > CStringReplace
• std::string::substr > CStringSubStr
• std::string::copy > CStringCopy
• std::string::resize > CStringResize
• std::string::swap > CStringSwap
• std::string::find > CStringFind
• std::string::rfind > CStringRFind
• std::string::find_first_of > CStringFindFirstOf
• std::string::find_first_not_of > CStringFindFirstNotOf
• std::string::find_last_of > CStringFindLastOf
• std::string::find_last_not_of > CStringFindLastNotOf

Note: Except for std::string::operator=, which can be written in C as CStringEqual, other operators are not worth it to be written or can be achieved with already defined functions.