text_io.open filename question

text_io.open filename question

[Oliver Hilgendorf]

I want to open several textfiles using text_io.open. The length of
each filename is only know at runtime. However if I define a string of
the maximum filename-length to hold the filename, all trailing blanks
are also passed to text_io.open and this results in name_error because
a file with trailing blanks does not exist.
So I have to pass a string that is defined with exactly the same
length as the actual filename.
How can I define a string object with variable length at runtime?

Oliver

Re: text_io.open filename question

[Tom Moran]

Biggest_String:String(1 .. 200);
Last : Natural;
...
get (up to 200) characters into the first part of Biggest_String
set Last to the position of the last character, 
Just pass Biggest_String(1 .. Last) to the file open or whatever.