CString::Mid() 是否有 std::string 等价物？

Question

CString::mid()在std::string是否有任何等效函数？

Answer 1

The equivalent would be std::string::substr with the following interface:

basic_string substr( size_type pos = 0, size_type count = npos ) const;
constexpr basic_string substr( size_type pos = 0, size_type count = npos ) const;

And you can use it like:

std::string str = "0123456789abcdefghij";

// returns [pos, size())
std::string sub1 = str.substr(10);
std::cout << sub1 << '\n';

// returns [pos, pos+count)
std::string sub2 = str.substr(5, 3);