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Full Discussion: how exactly does pclose work in C?
Top Forums Programming how exactly does pclose work in C? Post 302504997 by Corona688 on Wednesday 16th of March 2011 12:18:54 AM
Old 03-16-2011
Quote:
Originally Posted by omega666
sorta unrelated question:
if you have an array that not all elements have been put in
Please don't use netspeak. We really discourage it here; and if you know what "you" means, you also know how to spell it!

What do you mean by 'put in'? And what kind of array, anyway?
Quote:
and you do a for loop for it, will it crash if it tries to access one of the elements that doesn't have anything in it?
Depends what it is and what you're doing with it. An array of integers may have unpredictable values if you never put anything in it before you used it, but won't crash in of itself. (Of course, the things you do with unexpected numbers may cause it to crash, but that's neither here nor there.) An array of pointers may be full of garbage pointers aimed at nowhere in particular which will crash if you dereference them. Or, worse, they may be pointers to VALID if unintended memory, which will do bizzare unpredictable things instead of crashing.

But in any of these cases it's not the array that's crashing -- it's what you do with the values you find in it.
 

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LEARN ABOUT DEBIAN

plscmap0a

PLSCMAP0A(3plplot)						    PLplot API							PLSCMAP0A(3plplot)

NAME

       plscmap0a - Set color map0 colors by 8-bit RGB values and  double alpha value.

SYNOPSIS

       plscmap0a(r, g, b, a, ncol0)

DESCRIPTION

       Set  color  map0  colors using 8-bit RGB values (see the PLplot documentation)  and floating point alpha value.	This sets the entire color
       map -- only as many colors as specified will be allocated.

       This function is used in examples 30.

ARGUMENTS

       r (PLINT *, input)
	      Pointer to array with set of unsigned 8-bit integers (0-255) representing the degree of red in the color.

       g (PLINT *, input)
	      Pointer to array with set of unsigned 8-bit integers (0-255) representing the degree of green in the color.

       b (PLINT *, input)
	      Pointer to array with set of unsigned 8-bit integers (0-255) representing the degree of blue in the color.

       a (PLFLT *, input)
	      Pointer to array with set of PLFLT values (0.0 - 1.0) representing the transparency of the color.

       ncol0 (PLINT, input)
	      Number of items in the r, g, b, and a arrays.

AUTHORS

       Geoffrey Furnish and Maurice LeBrun wrote and maintain PLplot.  This man page was automatically generated from the DocBook  source  of  the
       PLplot documentation, maintained by Alan W. Irwin and Rafael Laboissiere.

SEE ALSO

       PLplot documentation at http://plplot.sourceforge.net/resources.

								   August, 2012 						PLSCMAP0A(3plplot)
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