Texas Instruments TI-89 Developer's Manual page 275

Appendix A: System Routines — Algebra Utilities
compare_expressions
TI-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)))
{ s = compare_expressions (lead_base_index (term), base);
if (s)
if (s < 0)
return FALSE;
else
term = remaining_factors_index (term);
else
return TRUE;
}
return FALSE;
}
TI-89 / TI-92 Plus Developer Guide
(continued)
/* Loop over factors of term */
/* base > all remaining bases in term */
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Beta Version January 26, 2001