HP HP-28S - BOXS Without Local Variables

BOXS Without Local Variables
The following program uses only stack operations to calculate the sur-
face of a box.
Compare this program with BOXS.
3:
height
2: width
1 :
length
Program
·K
DUP2 :t
F.:OT
4 PICK
:t
+
F.:OT
I':OT
:t
+
'J
'-
l
:~:.
Arguments
Results
"7.
~ ..
2:
1 : area
Comments
Begin the program.
Calculate
wI.
Move w to level 1.
Copy h to level 1.
Calculate who
Calculate wI + who
Move h and I to levels 2 and 1.
Calculate
hI.
Calculate wI + wh + hI.
Calculate 2(wl + wh + hI).
End the program.
Because this version
of BOXS isn't a user function, it can't be used in
algebraic syntax.
244 28: Programming Examples