IAI America XSEL-QX - Manual (Page 292)

268
Part 4 Commands
z WS (Select if true; character)
Command, declaration
Extension condition
(LD, A, O, AB, OB)
Input condition
(I/O, flag)
Command,
declaration
Operand 1 Operand 2
Output
(Output, flag)
Prohibited Prohibited WS
Column
number
Column
number,
character literal
CP
[Function] This command is used between SLCT and EDSL commands to execute the subsequent
commands up to the next W
command or an OTHE or EDSL command when the
comparison result of the character strings in the columns specified in operands 1 and 2
satisfies the condition.
Comparison will be performed for the length set by a SLEN command.
If a character literal is specified in operand 2, comparison will be performed for the entire
length of the literal.
WS
EQ Operand 1 = Operand 2
NE Operand 1 z Operand 2
[Example 1] SLEN 3 Set the number of comparing characters to 3.
SCPY 1 ‘ABC’ Assign ‘ABC’ to column 1.
LET 1 2 Assign 2 to variable 1.
:
SLCT Execute multi-branching.
WSEQ 1 ‘XYZ’
:
(1) will be executed if columns 1 to 3 contain ‘XYZ.’
Since columns 1 to 3 contain ‘ABC,’ however, this
command will not be executed.
(1)
:
WSEQ 2 *1
:
(2) will be executed if the content of the number of
characters specified by SLEN after column 2 is the
same as the content of the column specified in variable
1.
(2)
:
OTHE
:
This command will be executed if none of the conditions
are satisfied. In this example, since (2) was executed,
(3) will not be executed.
(3)
:
EDSL
:
(4)
The processing will move here if any of the conditions
was satisfied and the applicable command executed. In
this example, (2) and (4) will be executed.
:
* If multiple conditions are likely to be satisfied, remember that the first W will become valid and
any subsequent commands will not be executed. Therefore, state from the command with the most
difficult condition or highest priority.