Is there a built in function for std::string in C++ to compare two strings alphabetically when either string can be uppercase or lowercase?

Question

I know for C++ that basic comparative operators can accomplish the task if both words are either entirely lower or entirely upper case. I have an array of strings and letter

Answer 1

Nothing standard, but if you happen to be developing for Windows or have access to a Posix interface you could use the following: https://msdn.microsoft.com/en-us/library/k59z8dwe.aspx

// didn't run it through a compiler
// but it would look like something like this:
{
   using namespace std;
   string a = "HELLO"s;
   string b = "HelLO"s;
   bool bIsMatch = _stricmp(a.c_str(), b.c_str()) == 0;  // bIsMatch = true
}