HP -11C Owner's Handbook Manual page 63

122 Section 8: Subroutines
Main Program Subroutine
001- [f[tet 013- [f)[LBL)O
'O}0 " 014- (9 )(7]
<7 ons- (isa
" y 016- [SIN]
/ 017-5]
> 018- (@)(Rt™ ee
oo" ao
<«-——"
(Program assumes [DEG] trig mode.)
When you press ff] [C
displayed X-register, execution begins with the (LBL
with x, in the Y-register and xq in the
[C) instruction
in line 001. When the (GSB) 0 instruction in line 005 is encountered,
execution transfers to the
0 instruction in line 013 and
calculates y;. If for example, we used a value of 2 for x, and a value
of 3 for xg, here is how the solution would be calculated.
STO]O (sto
G25)
[Ejo
(4 in (x2 inRg) (Exchange) (x2-x, in
Y-reg. x2 Ro)
in X-reg.)
oe
Seah NS Ne NO
Ww ewe we ie
Keys>
Section 8: Subroutines 123
(GsBjo
f][LBLJO
OE USt
(Goto
tabelO) subroutine)
(Begin
(x?) 4)
SIN ic] 9 )(RTN CHS
{sinxy) (x,2—sinx, (Returnto (—(x4?
=y) main —sinx,))
program)
From line 018 execution transfers back to the main program and
continues with the first line after the last instruction. When
the (GSB) 0 instruction in line 008 is encountered, execution again
transfers to the LBL] 0 instruction in line 013.
=) so Do OH
(Exchange) (Goto (Begin (x2?)
labelO) Subroutine)