Texas Instruments TI-89 Developer's Guide

518
Appendix A: System Routines — EStack Utilities
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
delete_between
Declaration:
void
delete_between
(EStackIndex
low
, EStackIndex
high
)
Category(ies):
EStack Utilities
Description:
Deletes the quantums occupying from index
low
+ 1 through
high
by
copying down the quantums from
high
+ 1 through global
top_estack
,
which is then reduced by the number of deleted quantums.
Inputs:
low, high
— Indexes into the estack.
Outputs:
None
Assumptions: bottom_estack
<=
low
and
low
<=
high
and
high
<=
top_estack
.
Side Effects: top_estack
is reduced by the number of deleted quantums.
Availability:
On AMS 1.05 and higher.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: deleted_between, delete_expression, deleted_expression,
move_between_to_top, moved_between_to_top
Example:
void replace_top2_with_sum (EStackIndex i)
/* i indexes next-to-top expression.
Replaces the top two expressions with their sum.
*/
{ Access_AMS_Global_Variables;
EStackIndex j = top_estack;
push_sum (i, j);
delete_between (next_expression_index (i), j);
}

Texas Instruments TI-89 Specifications

General

Display size (HxV)	100 x 160 mm
Memory type	639K FLASH ROM, 188K bytes RAM
Compatible operating systems	Operating System 2.09
Battery type	AAA