Problem to display at the shell a smile or other sign

My Problem is, I write with c++ a programm. I would like draw on display other sign. I get the sign ? for the sign smile.
I can not use the extended ascii tabelle on c++.
thank for answer.

With "shell", do you mean it's a Terminal program?
The Terminal can display "extended ASCII" extremely well (*) ( the proper term is "any Unicode string"), but it only accepts UTF8 encoded strings. So to display a smiley character (U+263A), you would send the string "\xE2\x98\xBA" to the screen.
(*) The Terminal is smart enough to find an appropriate font for just about any character code you want to display, it's not limited to just using the character repertoire of your default shell font.

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