A.f=789.123,o=123.56 B.f=123.56,o=789.123 C.f=789.123,o=789.123 D.f=123.56,o=123.56
A.const double PI3.1415926; B.const doublee=2.7 C.definedouble PI3.1415926 D.define doublee=2.7
A.10%3=3 B.10/3=3 C.10%3=1 D.10/3=1