HP HP-67 - Page 177

Interrupting Your Program 173
Example: Arthur Dimsdale is solely responsible for the night shift
at
Tintoretto
Tins,
a
canning
company.
For
each
of
several
sizes
of
cylindrically-shaped cans, Dimsdale knows only the radius r and the
height & of each size of can, and the number of cans of each size.
He needs to first calculate the area of the base and display it long
enough to set a dial on his production line (a 1-second display will
do). Then he needs to know the volume of the can long enough to
write it down (this should take him about 5 seconds), and finally
he needs to know the total volume of all cans of that size.
Solution: The program below first calculates the area 4 of the base by
the formula A = 7rr2, and uses a((PAUSE] to display the area for about 1
second. Then the program calculates the volume V of a single can
according to the formulaV =4 X h, and uses an(o] pause to display
the volume long enough for Dimsdale to write it down. Finally, the
program multiplies the number of cans (n) times the volume of each
can to compute the total volume of all cans of that size. The program
assumes that the number of cans (n) has been entered to the Z-register
of the stack, that the height 4 of the can has been entered to the
Y-register, and that the radius has been placed in the displayed
X-register.
To load the program into the calculator:
Slide the Program Mode switch weram [l run to W/PRGM.
Press Display
2
0En
a
Q 003 35 73]} Calculates A = 7r2.
o 005 35 72| Displays A for about 1
second.
a 006 71| CalculatesV = A X h.
0@ Cx- Displays V of one can for
about 5 seconds.
8 Calculates total volume.
O rN 009 35 22| Stops and displays total
volume.