Euler Identity in Home

[Manolo Sobrino]

Han, what's so hard to understand that if you claim to work with 12 significant digits, and you round in every step to 12 significant digits, and you store numbers with 12 significant digits, you can't simply give back results calculated with 25 significant digits? And adding insult to injury give them rounded to 12 in floating point?

I finally got it, these things are made by engineers, for engineers, with the depth of mathematical knowledge of engineers. A match made in heaven.