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Converting string to Integer, Real, etc...
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| Jeremy 2006-12-27, 7:04 pm |
| How can I convert a string to an integer and other types? What
about the reverse? I do not see an intrinsic for it.
Jeremy
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| Dick Hendrickson 2006-12-27, 7:04 pm |
| Jeremy wrote:
> How can I convert a string to an integer and other types? What
> about the reverse? I do not see an intrinsic for it.
>
> Jeremy
It's called an internal read or internal write. in effect, you
use a character variable as the "file name" and read or write
the I/O list. Any book on Fortran should cover it. You do
things like
read(character_variable, format) list of variables
to "convert a string to an integer".
You want to be a little careful with a "string". Technically,
Fortran doesn't have them. It has character variables and they
are a little different from C strings. In particular, they have a
fixed length and don't have any special termination character.
Blank fill happens automagically in places where you might not
expect it.
Dick Hendrickson
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Jeremy wrote:
> How can I convert a string to an integer and other types? What
> about the reverse? I do not see an intrinsic for it.
No, in Fortran use internal READ (and WRITE for other way).
You use the same features of external i/o except from/to an internal
file (in it's most straight-forward case a character variable or array)
instead of an external file.
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| Beliavsky 2006-12-27, 7:04 pm |
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Dick Hendrickson wrote:
> Jeremy wrote:
> It's called an internal read or internal write. in effect, you
> use a character variable as the "file name" and read or write
> the I/O list. Any book on Fortran should cover it. You do
> things like
>
> read(character_variable, format) list of variables
>
> to "convert a string to an integer".
>
> You want to be a little careful with a "string". Technically,
> Fortran doesn't have them. It has character variables and they
> are a little different from C strings. In particular, they have a
> fixed length and don't have any special termination character.
> Blank fill happens automagically in places where you might not
> expect it.
I just started a "Fortran FAQ" Wikibook at
http://en.wikibooks.org/wiki/Fortran_FAQ . Anyone can contribute. Would
you mind if I revised your answer slightly and posted it there?
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Dick Hendrickson wrote:
....
> You want to be a little careful with a "string". Technically,
> Fortran doesn't have them. It has character variables and they
> are a little different from C strings. In particular, they have a
> fixed length and don't have any special termination character.
> Blank fill happens automagically in places where you might not
> expect it.
And, simply to fill out the other end of the spectrum :), truncation if
the target character variable isn't long enough to hold the operand.
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