sub getDifference b1, b2
    r = (b2 - b1) mod 360
    if r >= 180 then r = r - 360
    print r
end sub

print "Input in -180 to +180 range:"
call getDifference  20, 45
call getDifference -45, 45
call getDifference -85, 90
call getDifference -95, 90
call getDifference -45, 125
call getDifference -45, 145
call getDifference -45, 125
call getDifference -45, 145
call getDifference  29.4803, -88.6381
call getDifference -78.3251, -159.036
print "Input in wider range:"
call getDifference -70099.74233810938, 29840.67437876723
call getDifference -165313.6666297357, 33693.9894517456
call getDifference 1174.8380510598456, -154146.66490124757