Application #1 Calculator - Radio Shack TRS-80 Model 100 Basic Manual

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Application #1 Calculator
This application program converts your computer into a calculator.
Insert the cassette containing the Calculator program in your cassette recorder.
Rewind the cassette if necessary.
Clear memory with the NEW command and then load the calculator program by
pressing PLAY on the recorder and entering the command:
CLOAO "CALC"
List the program and compare it to Figure 1-1 to verify that it loaded correctly. Save
the program in a RAM file by entering the command:
SAVE "CALC"
For convenience, you may also wish to save the calculator program on a separate
cassette. Use the command
CSAVE "CALC"
to write the program to a blank cassette.
This program allows you to use your Computer as a calculator. This means that
numbers may be added, subtracted, multiplied or divided as they are entered from the
keyboard, without having to include them as an expression in a PRINT statement.
Execute the program. There will be no visual indication that anything has happened.
However, if you type the following sequence:
2+3;;;
you will see that the result is immediately displayed:
2+3= 5
Notice that this is exactly the way you would enter data to be added on a calculator.
Try the following simple calculations:
Press keys in this order
9-2=
3.25*7=
-1/3=
5*6-9.3=
4"2=
2+3*4=
2+(3*4)=
(2 + 3)/(2.5*4) =
11((1 +
(.5"( -
2»)/(1 + .5»)
=
7
22.75
-.33333333333333
20.7 (30 minus 9.3)
16 (4 to the 2nd power)
20 (5 times 4)
14 (2 piUS 12)
.5 (5 divided by 10)
.3 (1 divided by 3.333 ...)
Notice that exponentiation and parentheses are both supported. Keep in mind that the
calculator computes the result immediately as each of the operators is entered. The
equal sign
(=)
prints the result.
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