bb8b0d22-eece-4d7a-b471-b820315f5e1a 23 4 5 decimal
&[DATE] &[TIME] - &[FILENAME]
&[PAGENUM] / &[COUNT]

This is the version that prohibits (0,0)

y x atan2 x 0 ≡ π 2 y sign * / y x / atan x 0 < ( π y 0 ≥ ( y 0 < ( - ( * * + if : # Division by zero. 0 ° 180 π 1 ° 90 π 0.5 ° 90 - π 0.5 - ° 135 π 0.75 ° 135 - π 0.75 - ° 45 π 0.25 ° 45 - π 0.25 -

This is the version that tolerates (0,0)

y x atan2 x 0 ≡ π 2 / y sign * y x / atan x 0 < ( π y 0 ≥ ( y 0 < ( - ( * * + if : 0 0 ° 180 π 1 ° 90 π 0.5 ° 90 - π 0.5 - ° 135 π 0.75 ° 135 - π 0.75 - ° 45 π 0.25 ° 45 - π 0.25 -

Not-units-proof version - (0,0) prohibited

y x atan2 x i y * + arg : # Argument of zero is not defined. 0 ° 180 π # Operation cannot be performed with units. ° 90 π # Operation cannot be performed with units. ° 90 - π # Operation cannot be performed with units. ° 135 π # Operation cannot be performed with units. ° 135 - π # Operation cannot be performed with units. ° 45 π # Operation cannot be performed with units. ° 45 - π # Operation cannot be performed with units.