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Algorithms for Image Processing and Computer Vision Source Code

@c ----------------------------------------------------------------------
@node errno, stdio
@heading @code{errno}
@subheading Syntax

@example
#include <errno.h>

extern int errno;
@end example

@subheading Description

This variable is used to hold the value of the error of the last
function call.  For details about the various error types, please refer
to the file @file{include/errno.h}. 

@xref{perror}