// Rosetta Code problem: http://rosettacode.org/wiki/Angle_difference_between_two_bearings
// by Jjuanhdez, 06/2022

print "Input in -180 to +180 range:"
getDifference(20.0, 45.0)
getDifference(-45.0, 45.0)
getDifference(-85.0, 90.0)
getDifference(-95.0, 90.0)
getDifference(-45.0, 125.0)
getDifference(-45.0, 145.0)
getDifference(-45.0, 125.0)
getDifference(-45.0, 145.0)
getDifference(29.4803, -88.6381)
getDifference(-78.3251, -159.036)
print "\nInput in wider range:"
getDifference(-70099.74233810938, 29840.67437876723)
getDifference(-165313.6666297357, 33693.9894517456)
getDifference(1174.8380510598456, -154146.66490124757)
end

sub getDifference(b1, b2)
    r = mod((b2 - b1), 360.0)
    if r >= 180.0  r = r - 360.0
    print r
end sub