Im_Index - Texas Instruments TI-89 Developer's Manual

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im_index

Declaration: EStackIndex im_index (EStackIndex k )
Category(ies): Algebra Utilities
Description: If k indexes an IM_RE_TAG, returns the index of the expression below it,
which is the imaginary part for internally-simplified algebraic expressions.
Otherwise returns the index of an integer or float 0, depending on the
arithmetic mode.
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 expression below it,
which is the imaginary part for internally-simplified algebraic expressions.
Otherwise returns the index of an integer or float 0, depending on the
arithmetic mode.
Assumptions: None
Side Effects: None
Availability: All versions of the TI-89 / TI-92 Plus.
TI-89 / TI-92 Plus
Differences: None
See Also: re_index, replace_top2_with_imre
Example:
push_expression (Integer1Index);
real_part = top_estack;
push_expression (FloatPiIndex);
replace_top2_with_imre (real_part);
im_index (top_estack);
TI-89 / TI-92 Plus Developer Guide
Appendix A: System Routines — Algebra Utilities
/* Returns the index of a float pi */
Not for Distribution Beta Version January 26, 2001