周一考试，最后问两题，如果通过了再上来讲讲，多谢
Given the contents of the raw data file TYPECOLOR.DAT:

  ----+----10---+----20---+----30
  daisyyellow

The following SAS program is submitted:

  data FLOWERS;
     infile 'TYPECOLOR.DAT' truncover;
     length
        Type $ 5
        Color $ 11;
     input
        Type $
        Color $;
  run;

What are the values of the variables Type and Color?

     A. Type=daisy, Color=yellow
     B. Type=daisy, Color=w
     C. Type=daisy, Color=daisyyellow
     D. Type=daisy, Color=

Answer: D
------------------------------------------------------------------------------
EMPLOYEE SALARY
name age name salary
Bruce 30 Bruce 40000
Dan35 Bruce 35000
Dan 37000
Dan.
The following SAS program is submitted:
data work.empsalary;
merge work.employee(in=inemp)
work.salary(in=insal);
by name;
if inemp and insal;
run;

how many observations will the data set WORK.EMPSALARY contain?
4
有in=不明白为什么答案是四个
不是要match么