Programmed Solutions - HP -11C Owner's Handbook Manual

12 Your HP-11C: A Problem Solver
Programmed Solutions
The heat loss for the water heater in the preceding example was
calculated for a 15-degree temperature difference. But suppose you
want to calculate the heat loss for several temperature differences?
You could perform each heat loss calculation manually. However,
an easier and faster method is to write a program that will
calculate the heat loss for any temperature difference.
Writing the Program. The program is the same series of
keystrokes you executed to solve the problem manually. Two
additional instructions, a label and a return, are used to define the
beginning and end of the program.
Loading the Program. To load the instructions of the program
into the HP-11C press the following keys in order. The calculator
records (remembers) the instructions as you key them in. (The
dispiay gives you information you will find useful later, but which
you can ignore for now.)
Keystrokes Display
(9] 000- Places HP-11Cin
Program mode. (Program
annunciator appears.)
CLEAR 000- Clears program memory.
001-42,21,11 Label "A" defines the
beginning of the program.
3 002- 3
0 003- 0
004- 20 The same keys you
(] 005- 48 ppressed to solve the
4 006- 4 problem manually.
7 007- 7
008- 20
(g](RTN] 009- 43 32 "Return" defines the end
of the program.
0.0000 Places HP-11C in Run
mode. (Program
annunciator is cleared.)