c without usin any graphics function

[shaanxxx]

if u give cordinates to programme at run time and want a line to be
drawn.. how to do this in c without usin any graphics function?
like x1,y1 and x2,y2
and lines should be drawn from the 1st co-ordinate to 2nd one

any pointer would be appreciated

Thanks

[Richard Heathfield]

shaanxxx said:

if u give cordinates to programme at run time and want a line to be
drawn.. how to do this in c without usin any graphics function?
like x1,y1 and x2,y2
and lines should be drawn from the 1st co-ordinate to 2nd one

Use putchar.

any pointer would be appreciated

putchar is a pointer (except in cases where it's a macro).

--
Richard Heathfield <http://www.cpax.org.uk >
Email: -www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999

[Thad Smith]

shaanxxx wrote:

if u give cordinates to programme at run time and want a line to be
drawn.. how to do this in c without usin any graphics function?

Drawing a line is a graphics function. You can either get one for your
target system or write your own, but in either case you would be using a
graphics function.

--
Thad

[borkhuis]

On Sep 6, 8:50 am, shaanxxx <shaan...@yahoo .comwrote:

if u give cordinates to programme at run time and want a line to be
drawn.. how to do this in c without usin any graphics function?
like x1,y1 and x2,y2
and lines should be drawn from the 1st co-ordinate to 2nd one

any pointer would be appreciated

Thanks

#define GIVEN_COORDINAT E1_X 1
#define GIVEN_COORDINAT E1_Y 1
#define GIVEN_COORDINAT E2_X 2
#define GIVEN_COORDINAT E2_Y 2

int main(int argc, char *argv[])
{
printf("Take pencil and draw line from (%d,%d) to (%d,%d).\n",
GIVEN_COORDINAT E1_X, GIVEN_COORDINAT E1_Y,
GIVEN_COORDINAT E2_X, GIVEN_COORDINAT E2_Y);
}

And for pointers you can take a look here:
http://en.wikipedia.org/wiki/Pointer_(dog_breed)

Or you could try to do your own homework.

[Alexei A. Frounze]

On Sep 5, 11:50 pm, shaanxxx <shaan...@yahoo .comwrote:

if u give cordinates to programme at run time and want a line to be
drawn.. how to do this in c without usin any graphics function?
like x1,y1 and x2,y2
and lines should be drawn from the 1st co-ordinate to 2nd one

any pointer would be appreciated

Thanks

Most portable ways, not requiring graphics libraries:
1. Draw the line using printf(), assuming 1 character = 1 pixel. You
can save this to a text file.
2. Draw the line in a memory buffer and then save it to a graphics
file that you can view using a web browser or graphics editor/viewer.
Formats that are easy to implement: BMP, XBM (http://en.wikipedia.org/
wiki/XBM :), PCX, etc.

Alex

[Gordon Burditt]

>if u give cordinates to programme at run time and want a line to be

>drawn.. how to do this in c without usin any graphics function?

Drawing a line is a graphics function. You can either get one for your
target system or write your own, but in either case you would be using a
graphics function.

Does "ASCII art" qualify as drawing a line? ( ---------- or _________
or you can use "character pixels" where every character position on a
(large) piece of paper is, say, @ or space). At least it doesn't
require graphics hardware.

Is "ASCII art" a graphics function?

[Mark McIntyre]

On Thu, 06 Sep 2007 07:25:07 -0600, in comp.lang.c , Thad Smith
<Th*******@acm. orgwrote:

>shaanxxx wrote:

>if u give cordinates to programme at run time and want a line to be
drawn.. how to do this in c without usin any graphics function?

Drawing a line is a graphics function.

Whats wrong with
puts("_______") ;
puts("|");
puts("|");
puts("|");

?
--
Mark McIntyre

"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it."
--Brian Kernighan

[osmium]

"Mark McIntyre" writes:

>>Drawing a line is a graphics function.

Whats wrong with
puts("_______") ;
puts("|");
puts("|");
puts("|");

It doesn't meet the spec. The OP gave x and y coordinates in his question.
Rounding an angle to the nearest 45 degrees, at best, wouldn't satisfy that
by any stretch of the imagination.

[Walter Roberson]

In article <5k************ @mid.individual .net>,
osmium <r1********@com ast.netwrote:

>"Mark McIntyre" writes:

>>>Drawing a line is a graphics function.

>Whats wrong with
puts("_______" );
puts("|");
puts("|");
puts("|");

>It doesn't meet the spec. The OP gave x and y coordinates in his question.
Rounding an angle to the nearest 45 degrees, at best, wouldn't satisfy that
by any stretch of the imagination.

The OP did not require that the drawn line proceed straight from
the beginning to ending coordinates. If the coordinates are
integral and finite, then you could draw a 45 degree line of length
min(abs(x1-x0),abs(y1-y0)), and a straight line of length
max(abs(x1-x0),abs(y1-y0))-min(abs(x1-x0),abs(y1-y0))
provided that the shorter of these two fit whatever page-size is in use.
--
Okay, buzzwords only. Two syllables, tops. -- Laurie Anderson

[user923005]

On Sep 5, 11:50 pm, shaanxxx <shaan...@yahoo .comwrote:

if u give cordinates to programme at run time and want a line to be
drawn.. how to do this in c without usin any graphics function?
like x1,y1 and x2,y2
and lines should be drawn from the 1st co-ordinate to 2nd one

It's fairly difficult to draw a line. They are infinitely long.
Segments are a bit easier.

1. Ask for rows and columns available on the terminal
2. Create an array of [rows][columns] characters
3. Draw a segment through your grid with something like this:
http://pubpages.unh.edu/~cs770/notes/lines.html