|
|
Section 4: Programming 1 54
|
|
|
Sample Case: Repeating and Stopping
|
|
Assume that you get a 15% discount (i.e., you pay 85%) on the following purchases:
|
|
|
|
|
|
Create a program at the top of memory to display the cumulative cost.
|
|
|
Only two unfamiliar operations (GTO and R/S) are needed. They are summarized in
Figure 4-3.
|
|
|
Method. After clearing the stack once at the start, let the program stop to accept data
and to display any previous accumulation (zero, at first). Then key in:
|
|
|
Quantity ENTER Price R/S
|
|
|
Have the program then calculate the discounted cost (5 × 2 × .85,
the first time), adding the cost to the previously accumulated total. Repeat this for the
second, third, and fourth pairs which are to be entered after the respective stops.
The flowchart (p. 55), shows the process.
|
|
|
Writing the Program
|
|
|
1.
|
To key in the program set the mode switch to W/PRGM.
|
|
|
2.
|
Press fPRGM to clear program memory.
|
|
|
3.
|
Key in the program.
|
|
|
|
Again, for now, if you make a mistake, clear memory and start over.
|
|
|
Press
|
|
|
Comment
|
|
|
|
f
|
|
|
Clear the stack.
|
|
STK
|
|
|
|
|
LBL
|
|
|
Identify place to start repetition.
|
|
9
|
|
|
|
|
R/S
|
|
|
Stop the calculator. During the stop key in a pair of values and press
R/S to restart the program.
|
|
|
|
