Texas Instruments TI-89 Developer's Guide

Appendix A: System Routines — Algebra Utilities
233
TI
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89 / TI
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92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
compare_expressions
(continued)
TI
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89 / TI
-
92 Plus
Differences:
None
See Also: compare_numbers, compare_Floats, compare_complex_magnitudes
Example:
Boolean does_term_have_base (EStackIndex term, EStackIndex base)
/* Returns TRUE if and only if term has base. */
{ Int s;
while (! IS_NUMBER_TAG (ESTACK (term))) /* Loop over factors of term */
{ s = compare_expressions (lead_base_index (term), base);
if (s)
if (s < 0)
return FALSE; /* base > all remaining bases in term */
else
term = remaining_factors_index (term);
else
return TRUE;
}
return FALSE;
}

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