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Reading String from txt file

frasheed

Hello All,

I am writing a short code to read Strings from a file.

Example of file that I want to read.

SAMPLE DATA

Name "Technology" "Version" "revision"

started "15july" "30july"

label "New" "Old"

and the code is

f = infile(my.txt)

while( str = lineread(f)
        case( car(str)
            ( Name               
                  Name = cdr(str)
             )                 
            );; end case

);; end while

Now after reading the values store in Name variable is ( "Technology" "Version" "revision"), and when I check the type for variable "Name" its showing me "list" but when I access any element using nth(0 Name) then its giving me ("Technology"), which is neither symbol nor string , I want it to be string without the paranthesis.

Any Good way to do that, I tried  pcExprToString command but its not giving me the desired output. 

Thanks

 

  • Andrew Beckett

    No it doesn't. nth(0 Name) will return "Technology". Or you could use car(Name):

    > Name
    ("Technology" "Version" "revision")
    > car(Name)
    "Technology"
    > cadr(Name)
    "Version"
    > nth(1 Name)
    "Version"
    > nth(2 Name)
    "revision"
    > nth(0 Name)
    "Technology"

    Presumably what you've done doesn't match what you've posted (after all your infile is missing quotes around the filename, so I'm assuming the code wasn't necessarily cut and pasted into the post).

    Regards,

    Andrew.

  • frasheed

     Hi Andrew, 

    Yeah I edited my code here so I forgot the quotes for the infile :). But I don't know how but I just re wrote the data in my.txt file and Its reading like you mentioned in ur reply. Thanks

    Anyway to read the data directly as a string ? my.txt data file is not fixed I will always change the data , Otherwise I would have used fscanf(%s), What you would suggest me ?

  • Andrew Beckett

    You could use gets() to read one line at a time, and then use the pcre.* functions to pull out various parts of the text - without knowing your precise requirements I can't really give you a detailed answer.

    Andrew.

  • frasheed

     Thanks for the quick reply.Actually It was my Mistake I was checking the type for the whole variable which is a string , if I check the type of nth(0 Name) then its String.

     

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