std::String与CString 相互转换

1、String -------> CString:
std::string test_str = “hello”;
auto test_cstr = test_str.c_str(); // 返回值为 char* 实质就是string字符串

2、CString -----> string:
CString test_cstr = L"hello";
std::string test_ctr(CT2A(test_cstr.GetString()));