PAT甲级1065 A+B and C (64bit) (20分) string大数加法 、大数比较的其他办法、long double 和double 的详解有效位数 ****
1065A+BandC(64bit)(20分)GiventhreeintegersA,BandCin[−263,263],youaresupposedtotellwhetherA+B>C.InputSpecification:Thefirstlineoftheinputgivesthepositivenumberoftestcases,T(≤10).ThenTtestcasesfollow,eac