HP HP-67

164 Program Editing
Problems
1. You may have noticed that there is a single keyboard operation,
[ &8, that calculates the hypotenuse, side ¢, of a right triangle
with sides a and b input to the X- and Y-registers. Replace
the (7, (%], (7, B2, and instructions in the Pythagorean
Theorem program with the single £§ instruction as follows:
a. Use the () (0] (0] (n] and keys to verify that the
Pythagorean Theorem program in your HP-67 contains the
instructions shown below.
oo1 [ (EJE@
002 B
003 O3 Replace all of these
004 [} instructions with a
005 B instruction.
006 [
007 [ [s1k
008 3
b. Use the (<] () (n) (n] keyboard operation to go to step
006, the last instruction to be deleted in the program.
c. Usethed keyboard operation in W/PRGM mode to
delete the instructions in steps 006, 005, 004, 003, and 002.
Note: When modifying a program, you should always de-
lete instructions before you add others, to ensure that no
vital instructions are “bumped” from the bottom of program
memory and lost.
d. Load the £ instruction into step 002.
e. Verify that the modified program looks like the one below.
001 0
002 B
003 @
004 @
f. Switch to RUN mode and run the program for a right
triangle with sides a and b of 73 feet and 112 feet.
(Answer: 133.69 feet)