Push_Gcd_Numbers - Texas Instruments TI-89 Developer's Manual

490

push_gcd_numbers

Declaration: void push_gcd_numbers (EStackIndex i , EStackIndex j )
Category(ies): EStack Arithmetic
Description: Pushes the gcd of the expressions indexed by i and j onto the estack.
Pushes 1.0 if either argument is a Float for which
is_Float_exact_whole_number ( . . . ) returns FALSE.
NOTE: gcd(0, k) = abs(k)
Inputs: i , j — Indexes to the numeric tag of tagged numbers.
Outputs: None
Assumptions: None
Side Effects: None
Availability: On AMS 2.02 and higher.
TI-89 / TI-92 Plus
Differences: None
See Also: push_gcd_then_cofactors
Examples:
push_reciprocal_of_quantum (2u);
fraction_half = top_estack;
push_Float (2.0);
float2 = top_estack;
push_gcd_numbers (fraction_half, float2);
push_negate_quantum_as_negint (2u);
push_gcd_numbers (Integer0Index, top_estack);
TI-89 / TI-92 Plus Developer Guide
Appendix A: System Routines — EStack Arithmetic
gcd(m/n, p/q) = gcd(m, n)/lcm(n, q)
gcd (L0, 0) = gcd (+0, 0) = gcd (0, L0) = gcd (0, +0) = +0
/* Pushes 1/2 */
Not for Distribution
/* Pushes 2 */
Beta Version January 26, 2001