How can I simplify this simple code?

Using Arduino Programming Questions
7

liudr:
Assuming current(dir) returns the numerical angle, you can do this:

absRollAngle=(current(dir)+360)%360;

http://arduino.cc/en/Reference/Modulo

Since I first started developing this program, I've learned about Strings and how bad they are (Although they make your code so readable).

I really like this method... when I try compiling, though, it says: invalid operands of types 'float' and 'int' to binary 'operator%'