1## args: float 2## ret: float 3## includes: math.h 40.0f 5-0.0f 60.001f 7-0.001f 80.5f 9-0.5f 100.999f 11-0.999f 121.0f 13-1.0f 141.001f 15-1.001f 16123.5f 17-123.5f 1812345.1f 19-1000000.5f 201e15f 21-1e30f 22