Question

This is a basic understanding concepts related question.

Working using: Embarcadero C++ Builder

What is the difference between:

opendir("C:\\XYZ")

and

String file = "C:\\XYZ";
opendir(file);

Aren’t both strings?
The first one works but the sexond gives me error:
E2034 Cannot convert Unicode String to ‘ const char*’

In a case where I take input from the user I can only pass a string. How do i pass the whole path?

Answer 1

first one is a const char*, second one is a std::string. The opendir function accepts only const char* in your case and thus cannot convert std::string to const char* on its own. you can get the function to work by opendir(file.c_str()); .