Owner`s manual

Page 36 of 74IIe

Printed: Tuesday, March 4, 2003 10:40:15 AM

what you named each of them. If you find that you've forgotten the names of the programs on

your disk, type CAT (or CAT,D2 if the disk is in drive 2).

You'll see a display like this that tells you, among other things, the name of the programs on

the disk and how much space they take up on the disk.

Typical Catalog

/MYPROGRAMS

NAME TYPE BLOCKS MODIFIED

PUZZLE BAS 40 <NO DATE> AGE BAS 1 <NO DATE> PRACTICE

BAS 11 <NO DATE> PAZAZZ BAS 14 <NO DATE> RAIN BAS 6

BLOCKS FREE: 208 BLOCKS USED: 72

]

Creating a Self-Starting Program

Programs that you buy don't require you to type RUN. They just start running when you put the

program disk in the disk drive and turn on the power.

If you'd like a program you've written to be a self-starter, you can make it self-starting by

following these steps:

Format a disk (for ProDOS)

Copy the files PRODOS and BASIC.SYSTEM from the ProDOS User's Disk. (You'll find instructions

for copying files in the ProDOS User's Manual that came with your disk drive.)

Copy your program onto the disk and give it the name STARTUP.

Starting up this disk loads ProDOS, puts you into BASIC, and runs your program.

It's Your Turn

This section presents two sample programs along with complete explanations of how they work.

Converting Miles to Kilometers

Here's a program that converts miles to kilometers.

Program Line Explanation

10 PRINT THIS PROGRAM CONVERTS 20 PRINT MILES TO KILOMETERS. Describes what the program

does.

30 PRINT HOW MANY MILES 40 PRINT DID YOU TRAVEL Prints your request for information. The

semicolon instructs the computer to leave the cursor on the current line rather than move it to

the next line.

50 INPUT MILE Puts ? on the screen. Whatever number you type is stored in a variable named

MILE. Note that because of the semicolon in line 40, the question mark appears on the same

line as the question.

60 LET KILO = MILE/.62137 Creates a variable named KILO, which is equal to MILE (the number

you enter) divided by .62137.

70 PRINT YOU TRAVELED KILO; 80 PRINT KILOMETERS. Prints what's inside the first set of

quotation marks, then prints the value of KILO, then prints what's inside the quotation marks

in line 80.