Can someone help me with that???, please )):

Question

https://code.sololearn.com/c6hMc3HRbHz2/?ref=app

Answer 1

The printf in line 16 has an invalid char - the opening quote. It's not an ANSI quote char. Just erase and type the regular quote.
The formula in line 18 uses a variable which is not declared - M_PI. Fix the name or declare it.

Some important improvements:
1. Use meaningful variable names. They help a lot in debugging.
2. Make proper use of indentation. This makes the topology quite visible.