Because there's no need to reinvent the wheel.

fixed in C

Fixed the warning.

Exit code 132 is due to Swift crashing with *** Program crashed: Illegal instruction at 0x000055cd112cc93c ***. "Illegal instruction" in Swift are caused by failed preconditions, such as integer overflow or out-of-bounds accesses.

This one is caused by integer overflow in your while (c != 0) loop. You reverse the digits of c into m by successive multiplications of m by 10 and adding the last digit of c. This fails when c has as many digits as Int.max and ends with large digits, the last multiplication by 10 overflows.

I added better assertion messages to Swift.

All languages except COBOL and pending translations are now identical: no rounding, integer inputs. I will review pending translations, update, and approve them too. I will try to bring COBOL to the common form too, but I'll see how it goes :)

I will close this issue and raise a new one for COBOL if I won't be able to get it to work.

Python fork adding random tests.

Haskell fork that fixes the random tests so that failed tests show the input strings along with some other minor improvements to test generation.

Author changed the link, close the issue

std::string o;
...
l = o.length();
char out[l];
...
return out;

• out is a local array variable. with return out; you are returning the address of a local variable, which is incorrect. as soon as the function exits the address becomes invalid.
• out is missing 1 byte for the nul-terminator

If you push code like this to prod you're getting fired lmao, shorter != better

fork approved

Function name typo

Function names misspelled in both.

Fixed, now all tests are guaranteed to have uppercase

the funniest thing is that the only lowercase test; all random tests are using uppercase