Texas Instruments TI89 Developer Guide - Page 313
IS_ARITH_APPROX is true and Integer0 if IS_ARITH_APPROX is false., ADD_TAG, pushes Float0 if
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Appendix A: System Routines - Algebra Utilities 271 push_but_term Declaration: void push_but_term (EStackIndex i, EStackIndex j) Category(ies): Algebra Utilities Description: Pushes onto the estack the sum of the terms of expression i without the leading term of j. If i == j and ESTACK(i) != ADD_TAG, pushes Float0 if IS_ARITH_APPROX is true and Integer0 if IS_ARITH_APPROX is false. Use this function to push all but a selected syntactic term out of an expression. If i indexes x + y + 3 and j indexes the partial reductum y + 3, then push_but_term(i, j) pushes x + 3. Functions such as index_reductum_with_tag_base can be used to select such a term. Inputs: i - Index of the top tag of an internally-simplified algebraic expression. j - i or the index of one of the reductums of the expression indexed by i. Outputs: None Assumptions: None Side Effects: None Availability: All versions of the TI-89 / TI-92 Plus. TI-89 / TI-92 Plus Differences: None See Also: lead_term_index, reductum_index Example: void push_but_term (EStackIndex i, EStackIndex j) { if (i == j) push_expression (reductum_index (i)); else { push_but_term (reductum_index (i), j); add_to_top (lead_term_index (i)); } } TI-89 / TI-92 Plus Developer Guide Not for Distribution Beta Version January 26, 2001
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