(50g) B>I and I>B

06172020, 03:16 AM
Post: #1




(50g) B>I and I>B
Here are two little User RPL programs that convert exact integers into binary numbers and vice versa, without the roundoff errors caused by the R>B and B>R functions. These conversions are trivial to do in System RPL, but that's no fun. Faster and/or shorter alternatives to the following would be delightful to see. The default wordsize of 64 may be assumed.
I>B (Integer to Binary) Input: Any exact integer (no decimal point) between 0 and 2^641 Output: The exact equivalent "user binary" (AKA binary number). Example: 2 41 ^ I>B > #20000000000h (exact, unlike R>B) Code: \<< "#" SWAP + "d" + OBJ\> \>> B>I (Binary to Integer) Input: Any "user binary" (AKA binary number). Output: The exact equivalent integer. Example: #123456789012345h B>I > 81985529205302085 (exact, unlike B>R, R>I) Code: \<< PUSH DEC \>STR 3 OVER SIZE 1  SUB OBJ\> POP \>> <0ΙΈ0> Joe 

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