More On Character Strings; Di Mensioning Strings; Concatenation - Sharp PC-1500A Instruction Manual

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NOTES: • Two-d imensional arrays can rapidly eat up storage space. For exam ple. an array
with 25 rows and 35 columns uses 875 storage locat ions!
Arrays are very pawerful programming tools. For a more complete treatment of arrays,
we
recommend supplementary reading.
• The following table shows the number of bytes used to define each variable and the number
used by each program statement.
Variable Variable name
Data
Numeric variable
7 bytes
8 bytes
String variable
7 b ytes
Array variable Specified n umber of bytes •
2
characters variable
16
bytes
• For example, if DIM ZS (2, 3)
*
10 is specified. 12 variables. each capable of string 10 chara·
cters, are
r~s~rv1?d.
This requires
7 bytes
(variable name)
+
10 bytes
(number
of characters) x
12
=
127 bytes.
Element Line number St.atement
&
function
Others.
I
••n • )
Number of bytes used
3
bytes
2
bytes
1
byte
B. MORE ON CHARACTER STRINGS
8 .1.
OIMensioning Strings
Ch aracter strings are lim ited. by default. to sixteen ch aracters in le n91h. By d imensioning a
character string it is P0'5ible to create a string whose length is up to
80
character·s. Reductions
in string lcng1h, 10 conserve memory space. are also possible.
The length of a st ring is specified in the DIMension starnmcnt
as
follows :
DIM variable·name (bound)* length
where:
variab!c•name is the name of the character string array.
bound is the maximum subscript o f the array.
length is the length of each string YJithin the array.
If o nly one string is needed, on array with one c lement {subscripted as e lement
iero)
may be
speci fied to conserve memory space. This is illustrated by the following declaration of
a
26
character string :
DIM AS(01 * 26
8.2. Concatenation
Several characte r strings (or characters within character variables) can be joined to form a single
string. This "adding" of character strings is called "concatenation". The form for
concat~nation
is :
variable : ; : : : ; :
char.'.lcter·string
charac tar-variable
+
character-string
charactcr-va riable
Example
1:
10 SS =
"SUPER "
20 TS = SS+ "MAN"
30 PRINT TS
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