TI58C, the programmable calculator!

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To evaluate and compare the different programmable calculators, I wrote small test programs applied to each of them.

"Forensics" test

The "forensics" algorithm was invented by Mike Sebastian to quickly provide a comparison of the accuracy of scientific calculators.
It is a matter of applying the following calculation and observing the result obtained:
arcsin(arccos(arctan(tan(cos(sin(9))))))

(See "Calculator Forensics" by Mike Sebastian)

But... the precision of the calculation (number of decimal places after the decimal point) will influence the final result...

:"Forensics" programs :

Factorial test

Even for calculators with a "factorial" function, programs have been written to be able to compare these calculators with others.

"Factorial" programs :

Stirling's formula

The formula of Stirling allows to approximate the factorial of a number.

"Stirling" programs :

"Fibonacci" test

Finding the Fibonacci number of rank n.

"Fibonacci" programs :

Binet's formula

The formula of Binet provides the n-th term of the Fibonacci sequence.

"Binet" programs :

The circle

Which program could apply to all programmable calculators ?

"Circle" programs :

Greatest Common Divisor

One of the classic small programs of calculator programming...

"GCD" programs :

Birthday paradox

The Birthday Paradox calculates the percentage chance of finding 2 people with the same birthday (not necessarily born in the same year) in a group of n people.

"Birthday" programs :

Ramanujan's formula

The Ramanujan formula allows to calculate the factorial of a number.

"Ramanujan" programs :

Some programmers, accustomed to programmable calculators for which I have written programs, may be surprised by my programming style.

For all the calculators in my collection, apart from the ones I knew perfectly like the TI58C, I took it as a constraint not to use any documentation for getting started with the machine and programming it.

It was very easy for some machines but rather laborious for others, but I got through it without violating the rule I had set myself.

Paradox when I want to have for each machine its documentation as complete as possible... but I do not prohibit myself, when the calculator is "mastered", to read the manuals or different books as others would read novels.

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Last update on 03 July 2024