A、LEFT(“Visual FoxPro”,6)与SUBSTR(“Visual FoxPro”,1,6)
B、YEAR(DATE())与SUBSTR(DTOC(DATE()),7,2)
C、VARTYPE(“36-5*4”)与VARTYPE(36-5*4)
D、假定A="this",B="is a string",A-B与A+B
A、LEFT(“Visual FoxPro”,6)与SUBSTR(“Visual FoxPro”,1,6)
B、YEAR(DATE())与SUBSTR(DTOC(DATE()),7,2)
C、VARTYPE(“36-5*4”)与VARTYPE(36-5*4)
D、假定A="this",B="is a string",A-B与A+B
时间:2022-01-08 18:30 关键词: