Sharp PC-1500A Instruction Manual page 71

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In this example. the variable I is used to select which s torage location wi ll hold the resul t
and
it
is also being used to compute the result.
To declare a c. h aracter array a slightly different form of the
DIM
statement is used :
DIM character-variable·name hi zeJ *length
.. ..,here:
character·variable·n amc is a variable name which conforms to the rules for normal character
variables as d iscussc d prtviously .
size is
the
number of storage locations and must be in the range 0 th rough 255. Note th at
when you specify a number, you get one more location than you specified.
*length is OPtional. If used , it specifics the length of each of the strings that comprise the
array . Length is a number in the range
I to 80.
If this clause is not used. the strings
will have the defoult length of 16 characters.
Examples of legal character array declarations are :
DIM XS (4J
DIM NMS ( 10)
*
10
DIM INS (1J*80
DIM
RS
(OJ* 26
The fi rst example creates an array of five strings each able to store 16 charac ters. The second
D IM statement declares an array NM with eleven strings o f 10 c haracters each . Explicit definit ion
of Slrings smaller than the dcf-0ult helps to conserve memory space. The third example declares
a two
clement array
of
80-eht1rac1er strings
and
the
last e
xample declares a single string of twenty·
six c haracters (see Section B.1 .).
Besides the simple arrays we have just studied the PC·1500A allows "two-dimensional" arrays.
By analogy. a one-dimensional array is a list of data arranged in a single column . A
two~imen·
sional array is a table of data \Vith rows and columns. The t\-•10-dimensionat array is declared by
the statement :
..Q!M.
numeric·variable·name (rows. columns)
.2!..
.Q!M.
character-variable·namc (r-o ..
•1s,
colu1nns) .f. lc r1gth
where:
rows specifies the number of rows in 1he array. This must be a number in the range 0 through
255. Note that \\ihen you specify the number o f ro\vs you get one more row than the
specification.
columns specifies the number of columns in the array . This must be a number in the range 0
through 255. Note that when you specify the number of columns you get one more
column than the specification.
The following diagram illustrates the storage locations that result from the declaration DIM T
(2, 3J and the subscripts (now composed of two numbers) which pertain to each storage locat•on:
colum11
1
column 2 column 3 column 4
T (0, 0) T (O. 1)
T 10, 2 J
T (0 , 3)
<OW
T (I, 01 T (1,1J T
(1,
2) T
(1,
3J
row
2
T (2, OJ T 12.
1)
T (2. 2J T (2. 3J
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