I am using the variable "pi" in my Lite-C code but get an error that says it is "undeclared identifier".
When I write pi the text changes colour to red in sed like it knows what it is, but when I run I get that error.
I am using pi to calculate some angles in degrees to make them radians.
Mabe I am missing some "include" to be able to use it?
Does anyone know what include I need?