#include <cstdio>    // for printf, sprintf.
#include <cstring>	// for strchr.
#include <tchar.h>	// for _T.
#include <Windows.h>	// for MessageBox.

/*
実行方法

chcp 65001
dir /b | test.exe

*/

int main()
{
	char buffer[1024] = {};

	if ( std::fgets(buffer, 1024, stdin) != nullptr )
	{
		if ( auto *p = std::strchr(buffer, '\n') )
			*p = '\0';

		char msg2[100];
		std::sprintf(msg2, "%02X %02X %02X %02X : %s",
			buffer[0] & 0xFF, buffer[1] & 0xFF, buffer[2] & 0xFF, buffer[3] & 0xFF, buffer);
		::MessageBoxA(nullptr, msg2, "UNKO", MB_OK); // → E2 86 9D... (OK)

		wchar_t msg3[100];
		if ( ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, buffer, -1, msg3, sizeof msg3 / sizeof *msg3) == 0 )
		{
			_tprintf(_T("text encoding conversion failed\n"));
			return ~0;
		}
		std::sprintf(msg2, " > %04X %04X %04X %04X",
			msg3[0] & 0xFFFF, msg3[1] & 0xFFFF, msg3[2] & 0xFFFF, msg3[3] & 0xFFFF);
		::MessageBoxA(nullptr, msg2, "UNKO", MB_OK); // → 219D... (OK)

		::MessageBoxW(nullptr, msg3, L"UNKO", MB_OK);
	}
}