How to use symbols of extended ASCII table in C?

Question

I've been tried to print Extended ASCII characters:

http://www.theasciicode.com.ar/

But all those symbols were printed as question-character on the white background ?.

I use the following cycle to print that symbols:

for (i = 0; i <= 30; i++)
    printf("%c", 201);

Question: Is there any way to print those Extended ASCII characters or not? Or maybe there is special library for these characters?

OS Linux Ubuntu 13.04, Code::Blocks 12.11 IDE.

hopefully a well configured terminal and ncurses will help. Emitting output depends on the terminal. WHat are you using? A PC ? A linux box with xterm ? — BigMike, Jun 28 '13 at 10:26
@BigMike, So, the program prints that characters, but my terminal doesn't recognize them? — yulian, Jun 28 '13 at 10:26
You don't *have* to avoid extended ASCII, but if you don't then you can expect a lot of problems with portability etc. — Paul R, Jun 28 '13 at 10:26
@JulianKhlevnoy if you're on unix/linux, it depends also on the terminal you're using (Xterm or RXVT or VT100). If you're on DOS IIRC there was a device driver to manage such ascii exception. on Win32 honestly I don't know — BigMike, Jun 28 '13 at 10:28
The loop is not using `i`, it's printing codepoint 201 31 times. — unwind, Jun 28 '13 at 11:25
@unwind, It uses. I want to print a bold line above and under matrix in order to make it easier to find in the output. — yulian, Jun 28 '13 at 11:40
There is no “extended ASCII”. ASCII is an 7-bit encoding, which is represented in modern devices and protocols using 8-bit bytes with first bit set to zero. Any reference to “extended ASCII” should be read as “a misnomer for someone’s 8-bit character code, which is purported to coincide with ASCII in the first 128 positions”. — Jukka K. Korpela, Jun 28 '13 at 18:25
@JukkaK.Korpela, I've got it. The answer suggests me to use Unicode - that is solution. Thanks for the information) I always glad for getting more knowledge. — yulian, Jun 28 '13 at 20:51

score 18 · Accepted Answer · edited May 23 '17 at 12:34

It's better to use unicode than extended ASCII, which is non-standard. A thread about printing unicode characters in C : printing-utf-8-strings-with-printf-wide-vs-multibyte-string-literals

But indeed you need to copy paste unicode characters..

A better way to start:

#include <stdio.h>

int main() {
    printf("\u2500\u2501\n");
}

See https://en.wikipedia.org/wiki/Box-drawing_character#Unicode for unicode characters for this extended ASCII style box art..

How to use symbols of extended ASCII table in C?

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