+=**=+¢ CALCULATOR¢ BY Robert E. Preston¢¢ EVERYONE NEEDS ONE!¢ This Program is a simple pocket¢ calculator on screen. It is written¢ using OSS MAC/65. I wish to thank Karl¢ E. Wiegers for his Boot Camp #43 in¢ Analog Computing for its assistance¢ with Atari floating point routines.¢ There now that that is over here comes¢ the description of the program.¢¢ THE MOTHER OF INVENTION IS NEED!¢ This program is simply an on¢ screen calculator. There have been¢ many times that I needed to do some¢ simple math when down by my system. It¢ seems that a simple calculator¢ function is not built into the Atari's¢ so I wrote one. It started out to just¢ be an exercise in the use of MAC/65¢ that got out of hand. So I offer the¢ program to you.¢¢ HOW TO:¢ The use of the program is quite¢ simple just load the program from DOS.¢ It functions like a pocket calculator¢ just enter the numbers and an operator¢ to get the results. The math functions¢ supported are addition (+),¢ subtraction (-), multiplication (*),¢ division (/), powers of a number (^),¢ and roots of a number (|). CAVEAT: BE¢ CAREFUL WITH THE LAST TWO OPERATIONS.¢ It seems that when using logarithms,¢ it causes rounding errors that I have¢ yet to correct properly.¢¢ TRICKS ANYONE?¢ A couple of neat tricks to the¢ program is that the result from the¢ previous calculation is available to¢ the next as either the first or second¢ entry. To use the old result just¢ enter a "M" for the number and the old¢ result will be used. To exit the¢ program enter "E" when it asks you to¢ hit return to continue the screen will¢ be blanked and operation will be¢ returned to DOS.¢¢ PASS IT ALONG!¢ If you like this program feel¢ free to pass it on (as long as you¢ include this document). If you would¢ like a copy of the source listing send¢ me a donation (shows how to use¢ floating point and screen positioning¢ routines). ¢¢ ABOUT ME:¢ My address is¢ Robert E. Preston¢ 3681 Kipling¢ Berkely, Mich. 48072¢ If you have any suggestions for¢ improvement or other comments I can be¢ contacted on CIS, DELPHI, or GEnie.¢ CIS 72637,1134¢ DELPHI MENTAT¢ GEnie R.E.PRESTON¢¢ I hope you enjoy this routine and¢ find it useful.¢ Robert E. Preston¢ Presware Enterprises¢ -=-=-¢¢
