Sharp PC-1500A Instruction Manual page 166

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Command
Abbreviation
Remarks
SORGN
so.
This command $P«ifie1 the present pen position a. s the
(set origin) SOR .
new starting point (point of origin). Valid for GRAPH
SORG . mode only .
TAB
Specifies pen position.
Valid for TEXT mode only.
(1)
TAB Expression
(2)
LPRINT TA B Expression;
...
TEST
TE.
Color check . When executed. test draws a 5 mm
by
T ES. Smm square in each color.
TEXT TEX.
TEXT mode specification.
This mode prints charaeters
and numerals.
- Caution - (Refer to page
46)
This unit is capable of calcu lation for
a
mantissa of up to
1 O
digits. To increase accuracy. however,
the mantissa is calculated inside the unit up to 12 digits, the result of which is rounded to the
10th digit for display. For example. 5/9 and 5/9
*
9 are calculated as follows;
5/9 --+ 5.55555555555E·ll1
t
This is rOt.Jnded to the 10th digit.
Display--+ 5.555555556E·01
5/9
*
9
- >
4.99999999999E 00
t
This is rounded to tho 10th digit.
Display - 5.
Thus. calculations are carried out for mantissas ol up to 12
digit~
This may cause a diflerence
in the results of calcu lations when performed in succession and independently.
[Example 1] 3
1
-
9 •
Successive calculation :
3 [ SH••l~2
G
9
'""°''--+ -
9E -
11
Independent calculation:
3 [ - n~ 2
, ,,., .. ,
-+
9
8 9 1 ...... 1
-+
0
Even in the IF statement, this difference may cause the program not to work as pl anned fo r any
successive calculations.
(Example
2J
10 INPUT A
20 IF A " 2 >• 9 THEN
50
With A • 3. 3 " 2 results in 8.99999999991 E 00. making a n IF statement
unlormulated.
In this case, reprogram the calculation by using variables so that it is independent, as follows:
10 INPUT A
15 8 : A" 2
l
20 IF B
>
~
9 THEN 50
The result
of
A " 2 is substituted for
a
variable, which is
used to formulate a conditional expression.
(
Power calculations are based on log
x
and 10x. thus tending to cause a diflerence in the)
results from those calculated inside the com puter.
A " B -
10B
log
A
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ENO
164