Good evening Frank,
Thank you very much for your answer. The Writeln(y:0:2); works beautifully.
The backgroundcolor is solved as far as the text goes, but the rest is still
black. What is the whole area cover by the program, the "screen" called?
I still need to down load the help files - so if I am stupid, please say so.
I am a retired MAths teacher and I want to make programs so that the
learners(?) [earlier we called them pupils / students] can PRACTISE the
Maths.
Thanks again
James
----- Original Message -----
From: "Frank Peelo" <f...@eircom.net>
To: "FPC-Pascal users discussions" <fpc-pascal@lists.freepascal.org>
Sent: Monday, January 25, 2010 8:53 PM
Subject: Re: [fpc-pascal] Cancelling Scientific notation
On 25/01/2010 18:37, James Gibbens wrote:
Hallo FPC gurus,
I am VERY new to free pascal and I have a couple of problems. Can
somebody please help?
1. If a, b are real numbers and I want to round a/b foo to 3 decimal
places, the answer is displayed in Scientific notation. How do I turn
that off?
Are you using Write and Writeln? For strings and integers, you can specify
the field width, e.g.
x := 'Hello';
Write(x:10);
will write the variable x using at least 10 characters, using spaces for
padding if necessary. For floating-point types you can also specify the
decimal places, e.g.
y := 12.345;
Writeln(y:0:2);
will write y using at least 0 characters, i.e. no padding at all, with 2
digits after the decimal point.
2. Without using Object Pascal, how can I change the background colour, a
very black BLACK, when the program runs? It is strenuous on my poor eyes.
That I'm not so sure of. There used to be a crt unit, so add CRT to the
uses clause at the top of your program
uses foo, bar, CRT, whatever;
and then you could use
textbackground(blue);
textcolor(yellow);
and like that. I guess it's still supported.
Frank
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