CC, Run-time functions, fscanf
*Conan The Librarian (sorry for the slow response - running on an old VAX)
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/sys$common/syshlp/helplib.hlb CC, Run-time functions, fscanf *Conan The Librarian (sorry for the slow response - running on an old VAX) |
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Performs formatted input from a specified file.
Syntax:
#include <stdio.h>
fscanf(FILE *file_pointer, const char *format_string,...);
The ... represents optional expressions that are pointers to
objects whose results correspond to conversion specifications given
in the format_string. If no conversion specifications are given,
you can omit the input pointers. Otherwise, the function calls
must have exactly as many input pointers as there are conversion
specifications, and the conversion specifications must match the
types of the input pointers. Conversion specifications are matched
to input sources in left-to-right order.
The format_string for the input of information can include three
kinds of items:
o White-space characters (spaces, tabs, and new-line characters),
which match optional white-space characters in the input field.
o Ordinary characters (not %), which must match the next
nonwhite-space character in the input.
o Conversion specifications, which govern the conversion of the
characters in an input field and their assignment to an object
indicated by a corresponding input pointer.
A conversion specification consists of the following characters, in
the order listed:
o A percent character (%) or the sequence %n$ (where n is an
integer).
The sequence %n$ denotes that the conversion is applied to
the nth input pointer listed, where n is a decimal integer
between [1, NL_ARGMAX] (see the <limits.h> header file).
For example, a conversion specification beginning %5$ means
that the conversion will be applied to the 5th input
pointer listed after the format specification. The
sequence %$ is invalid. If the conversion specification
does not begin with the sequence %n$ the conversion
specification is matched to its input pointer in
left-to-right order. You should only use one type of
conversion specification (% or %n$) in a format
specification.
o One or more optional characters
o A conversion specifier.
Additional Information (explode) :
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