OpenEuphoria

RE: Display Text On Screen

• Posted by Chris Bensler <bensler at mail.com> Apr 02, 2002
• 436 views

"My Name is Sam" is a character string.
It's also a sequence.

{"My Name is Sam"} is not a character string. It is a sequence which 
contains a character string.

"A" is a sequence.
{65} is identical to "A"

'A' is an atom
65 is identical to 'A'

print() will display any EU object using code structure.
EG. print(1,"ABC") displays {65,66,67}

puts() will display any 1 dimensional sequence (character string) as 
text.
EG. puts(1,"ABC") displays "ABC"


A sequence is defined with enclosing curly braces, or double quotes
In simple terms, a sequence is an array. It can contain any Eu object, 
including other sequences.

For example, a character string is a sequence (or array) of bytes, where 
each byte represents an ASCII character.

It mainly depends on how your program interperets the sequence though.
{65,66,67,68,69,70} may be a character string ("ABCDEF"), or it might 
just be an array of numbers.


Chris

 Sam wrote:
> Thanks, miste, jbrow, and Ken Rhodes for your answers to my question 
> about single quotes. 
> 
> I've found three ways to display text on screen.
> 
> sequence Me
> Me = "My name is Sam"
> print (1, Me)
> 
> Output: {77,121,32,78,97,109,101,32,73,115,32,83,97,109}
> 
> Change last line to puts (1, Me)
> Output: My name is Sam
> 
> Change last line to printf (1, "%s", Me)
> Output: M
> 
> Change program slightly.
> sequence Me
> Me = {"My name is Sam"}
> print (1, Me)
> 
> Output: {{77,121,32,78,97,109,101,32,73,115,32,83,97,109}}
>    (Dbl. brackets.)
> 
> Change last line to puts (1, Me)
> Output (Err msg, sequence found inside character string)
> 
> Change last line to printf (1, "%s", Me)
> Output: My name is Sam
>  
>     O. K., the curly brackets apparently have the effect of making the 
> variable definition one unit, rather than a series of separate units. 
> Guess I don't really have a question, just an observation that the err 
> msg, `sequence found inside character string,' is really not very 
> helpful. There's nothing wrong with the sequence, the error is 
> (apparently) using puts in an inappropriate way.
> 
>     Don't misunderstand, I'm not dising Euphoria, just sharing my first 
> impressions with you.
> 
>     Sam
>  
>