next topic »

[on:]

Where can I find a list of all the special characters for char arrays and printing, like \n, \o and similar

Also how would I print the little superscripted 'o' symbol for degrees C or F, e.g. in 27<degrees symbol>C

TIA

[Reply #1 on:]

From The C Programming Language:

\a   alert (bell) character
\b   backspace
\f   formfeed
\n   newline (linefeed)
\r   carriage return
\t   horizontal tab
\v   vertical tab
\\   backslash
\?   question mark
\'   single quote
\ddd octal constant
\xhh hexadecimal constant

The degree symbol (as in 27°C) is unknown to C and (I think) C++ and printing it will probably involve device dependencies.

[Reply #2 on:]

Ninja2,
Try this page, you can even create your own custom character.
http://www.quinapalus.com/hd44780udg.html
TomJ

[Reply #3 on:]

Ninja2,
Just read a way to print the degree symbol on another post.
It's at the  bottom of the alternative code for averaging.
http://arduino.cc/forum/index.php/topic,99557.0.html
TomJ

[Reply #4 on:]

excellent help, thanks all

I must use/learn that list of backslash codes ...

found the magic syntax too ...

Code:

lcd.print((char)223);    // degree

yeeha        


... great forum, friendly players, top advice, fascinating topic(s)

[Reply #5 on:]

The degree symbol (as in 27°C) ...

Morris - how did you insert / type the degree symbol into your text above ?

[Reply #6 on:]

On this keyboard the degree symbol is shift+option+8 (An * that's turned into a ° by the option key).

You can do the same thing on a Windows keyboard by holding down the Alt key and typing in a code on the numeric keypad - but I've already forgotten the code.  :-(

[Reply #7 on:]

º how about alt+0186 º 
ºXºXºXº
google is so amazing these days, I just googled "How to type degree symbol on PC" and bingo

[Reply #8 on:]

º how about alt+0186 º 
ºXºXºXº
google is so amazing these days, I just googled "How to type degree symbol on PC" and bingo

Next day Google will push books ad to you that features a whole chapter on "How to type degree symbol on PC" 

[Reply #9 on:]

If the Extended ASCII code is 233, then you should be able to embed it in a string as

   char *temperature = "Today's high temperature is 27\xE9""C"

But my wimpy bash terminal window displays it as a question mark.  :-/

[Reply #10 on:]

from Morris:
\n   newline (linefeed)
\r   carriage return

I assume \r sends only a 13, but does \n send only a 10, or both 10 + 13?

[Reply #11 on:]

I assume \r sends only a 13, but does \n send only a 10, or both 10 + 13?

Depends on what is doing the sending, on what operating system.

[Reply #12 on:]

Depends on what is doing the sending, on what operating system.

How about this one: Serial.print("\n");

[Reply #13 on:]

Next day Google will push books ad to you that features a whole chapter on "How to type degree symbol on PC" 

LOL , and I'm a the perfect target for such

[Reply #14 on:]

How about this one: Serial.print("\n");

Sends exactly one byte - the new line value, 10. to the serial port.