What you are asking is (very close to) impossible.
When the original C++ code was interpreted, native machine code was generated. There is no way to go back from that to the original C++.
That’s like asking someone to go from 9 back to the original “3+3+3”. But who knows if that was the original? Noone can tell from “9” – it may have been “8+1”..
Sure, you can still read the generated asm and try to work out what the code does, but that is hard and you still won’t get the original C++ back.