string str="EMKEMEMM333936C35G4G9I3E2017-09-072017-09-0715500000000"; 我希望得出下列结果 string mach="EMKEMEMM333936C35G4G9I3E"; string startTime="2017-09-07"; string endTime ="2017-09-07"; int phone=15500000000; 请问如何分隔呢?