请教一个有input data 的问题

shiyiming

DATA sales;
  INPUT name $ Class DateReturned mmddyy10. CandyType$ Quantity;
CARDS;
Adriana 21 . MP 7
Nathan 14 3.21.2000 CD 19
Matthew 14 3.21.2000 CD 14
Claire 14 3.22.2000 CD 11
Caitlin 21 3.24.2000 CD 9
Ian 21 3.24.2000 MP 18
Chris 14 3.25.2000 MP 6
Anthony 21 3.25.2000 MP 13
Stephen 14 3.25.2000 CD 10
Erika 21 3.25.2000 MP 17
;

PROC PRINT;
RUN;
第一行中date是个missing value, 怎样能正确的读入数据呢？

谢谢

shiyiming

[code]DATA sales;
infile datalines truncover;
INPUT name $ Class DateReturned: mmddyy10. CandyType$ Quantity;
CARDS;
Adriana 21 . MP 7
Nathan 14 3.21.2000 CD 19
Matthew 14 3.21.2000 CD 14
Claire 14 3.22.2000 CD 11
Caitlin 21 3.24.2000 CD 9
Ian 21 3.24.2000 MP 18
Chris 14 3.25.2000 MP 6
Anthony 21 3.25.2000 MP 13
Stephen 14 3.25.2000 CD 10
Erika 21 3.25.2000 MP 17
;

PROC PRINT;
RUN;[/code]

shiyiming

这个代码好像没有问题啊，我运行的很正常！