Re_Index - Texas Instruments TI-89 Developer's Manual

Appendix A: System Routines — Algebra Utilities

re_index

Declaration: EStackIndex re_index (EStackIndex k )
Category(ies): Algebra Utilities
Description: If k indexes an IM_RE_TAG, returns the index of the second expression
below it, which is the real part for internally-simplified algebraic
expressions. Otherwise returns k .
Inputs: k — Indexes the top tag of an internally-simplified algebraic expression,
Outputs: If k indexes an IM_RE_TAG, returns the index of the second expression
below it, which is the real part for internally-simplified algebraic
expressions. Otherwise returns k .
Assumptions: None
Side Effects: None
Availability: On AMS 1.05 and higher.
TI-89 / TI-92 Plus
Differences: None
See Also: push_im, replace_top2_with_imre
Example:
push_expression (Integer1Index);
real_part = top_estack;
push_expression (FloatPiIndex);
replace_top2_with_imre (real_part);
re_index (top_estack);
TI-89 / TI-92 Plus Developer Guide
an algebraic comparison, or an aggregate thereof.
/* Returns the index of a tagged integer 1 */
Not for Distribution
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Beta Version January 26, 2001