Math problem

[Kamikaze47]

I have these 3 variables:


a VAR WORD
b VAR WORD

a and b can be anywhere from 0 to 999.

I need to work out a way of displaying an a/b percentage on my LCD to 1 decimal place.

I thought of this;


a VAR WORD
b VAR WORD
pct VAR WORD

pct=(a*1000)/b

which would give me the percent, with the last decimal being the decimal place. But this wont work if a=999 becuase 999*1000 is lager than a WORD can be.

I'm using PBP 2.46 so I cant use LONGs.

Any ideas? I'm sure this is possible, but i'm having a brain freeze.

[skimask]

DIV32...it's in the book.

[Kamikaze47]

thanks shimask

ive done this:


a VAR WORD
b VAR WORD
pct VAR WORD
temp VAR WORD

temp=a*1000
pct=DIV32 b

The only problem im having now is with rounding. If the real percentage is 65.28% id like it to display 65.3%, but of course im getting 65.2 because its just truncating the result.

[skimask]

thanks shimask
???????


The only problem im having now is with rounding. If the real percentage is 65.28% id like it to display 65.3%, but of course im getting 65.2 because its just truncating the result.

Add .05 to everything...but that's a good trick since PBP doesn't support decimal points.
So how are you handling that?

[sayzer]

If I get it right;

Why not this way?



<font color="#000000"> A <font color="#000080"><b>VAR WORD
</b></font>B <font color="#000080"><b>VAR WORD
</b></font>Solid <font color="#000080"><b>VAR WORD
</b></font>Liquid <font color="#000080"><b>VAR BYTE

</b></font>DoMath:
'....get values from somewhere..
Solid = A/B
Liquid = A//B
<font color="#000080"><b>IF </b></font>Liquid <font color="#000080"><b>DIG </b></font><font color="#FF0000"><b>0 </b></font>&gt;= <font color="#FF0000"><b>5 </b></font><font color="#000080"><b>THEN </b></font>Liquid = Liquid + <font color="#FF0000"><b>10
</b></font>Liquid = Liquid <font color="#000080"><b>DIG </b></font><font color="#FF0000"><b>1


</b></font><font color="#000080"><b>LCDOUT </b></font><font color="#FF0000"><b>$fe</b></font>,<font color="#FF0000"><b>1</b></font>, <font color="#008000"><b>&quot;A:&quot;</b></font>,<font color="#000080"><b>DEC </b></font>A, <font color="#008000"><b>&quot; B:&quot;</b></font>,<font color="#000080"><b>DEC </b></font>B
<font color="#000080"><b>LCDOUT </b></font><font color="#FF0000"><b>$fe</b></font>,<font color="#FF0000"><b>$c0</b></font>,<font color="#008000"><b>&quot;%&quot;</b></font>,<font color="#000080"><b>DEC </b></font>Solid,<font color="#008000"><b>&quot;.&quot;</b></font>,<font color="#000080"><b>DEC </b></font>Liquid
<font color="#000080"><b>PAUSE </b></font><font color="#FF0000"><b>30


</b></font><font color="#000080"><b>GOTO </b></font>DoMath


Something like this way???

[Acetronics2]

Hi, Sayzer

You' re to it ...

With showing the Half, now ( was DS 1820 Degrees with 3 Digits Leds...)



IF ( TEMP > 2631 and Temp < 3731) THEN ' -10 to 100°C

Virgule = 1

' round to 1/2 degré et show the 5/10

IF(Tempa // 10) < 3 THEN Tempa = ( Tempa/10)* 10 : GOTO AFF

IF(Tempa // 10) < 8 THEN Tempa = (Tempa/10)*10 + 5 : GOTO AFF

IF(Tempa // 10) > 7 THEN Tempa = (Tempa/10)*10 + 10 : GOTO AFF

ENDIF


Virgule = 0

IF (Tempa // 10) > 4 THEN Tempa = Tempa + 10

Tempa = Tempa/10 ' Show Degrees without tenths



Have a nice day

Alain