HP 3000 Manuals HP 3000 Manuals
Chapter 8 Calculation Specifications
Introduction
The Calculation Specification lets you perform arithmetic operations and
other types of operations such as searching tables and arrays, moving
data internally, performing subroutines, and using system intrinsics.
(See "Operation Field" in this chapter for a list of the Calculation
Specification operations.)
The Calculation Specification specifies:
* Whether to perform the operation at detail time or total time;
whether to perform the operation as a subroutine; or, whether to
perform the operation at all.
Detail-time operations are performed for each input record. For
instance, a program that calculates employee payroll performs
detail calculations for each employee record. Total-time
operations use data accumulated from a group of related records (a
control group). Total-time operations are performed when a
control break occurs (the current record's control field differs
from that of the previous record). For instance, a payroll that
accumulates employee pay by department contains Calculation
Specifications for processing department totals.
To execute a Calculation Specification operation at detail time,
leave the Control Level Field (columns 7-8) blank. (Additionally,
to execute detail-time calculations only in certain circumstances,
"condition" those specifications by entering general indicators in
their Indicator Fields (columns 9-17).) To execute a Calculation
Specification operation at total time, enter a control-level
indicator (L0-L9, LR) in the Control Level Field.
Subroutines are executed by the EXSR operation.
* The operation to perform, the data to use in the operation, and
where to store the result. Specify the operation in columns
28-32, the data in columns 18-27 (or columns 33-42), and the
result field in columns 43-51.
* The tests to perform on the results of the operation. You do this
by entering indicators in the Resulting Indicators Field (columns
54-59) of the operations that produce the results. Then you
condition subsequent operations with those indicators.
When you enter Calculation Specification operations, enter them in this
order:
1. Detail-time operations.
2. Total-time operations.
3. Subroutine operations.
The Calculation Specification is identified by a C in column 6:
___________________________________________________________________________________
| |
| 1 2 3 4 5 6 7 |
| 678901234567890123456789012345678901234567890123456789012345678901234|
| _______________________________________________________ |
| |
| C |
| |
| |
___________________________________________________________________________________
Figure 8-1. The Calculation Specification