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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_locale_encoding.htm below:

C++ Locale Library - encoding

It returns the width of an internal character in terms of external characters, if this is a fixed value. Otherwise, if this is a variable value, the function returns 0.

Following is the declaration for std::ctype::encoding.

	
int encoding() const throw();

int encoding() const throw();

none

It returns the width of an internal character in terms of external characters, if this is a fixed value.

No-throw guarantee − never throws exceptions.

The facet object is accessed.

In below example explains about std::ctype::encoding.

#include <iostream>
#include <locale>

int main () {
   std::locale loc;

   const std::codecvt<wchar_t,char,mbstate_t>& myfacet =
      std::use_facet<std::codecvt<wchar_t,char,mbstate_t> >(loc);

   std::cout << "Characteristics of codecvt<wchar_t,char,mbstate_t>:\n";
   std::cout << "Encoding: " << myfacet.encoding() << '\n';
   std::cout << "Always noconv: " << myfacet.always_noconv() << '\n';
   std::cout << "Max length: " << myfacet.max_length() << '\n';
   return 0;
}

Let us compile and run the above program, this will produce the following result −

Characteristics of codecvt<wchar_t,char,mbstate_t>:
Encoding: 1
Always noconv: 0
Max length: 1

locale.htm

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