trim 地用法

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82. A raw data record is listed below:
----|----10---|----20---|----30
Printing 750
The following SAS program is submitted:
data bonus;
infile 'file-specification';
input dept $ 1 - 11 number 13 - 15;
<insert code here>
run;
Which one of the following SAS statements completes the program and
results in a value of 'Printing750' for the DEPARTMENT
variable?
A. department = trim(dept) || number;
B. department = dept || input(number,3.);
C. department = trim(dept) || put(number,3.);
D. department = input(dept,11.) || input(number,3.);
Answer: C

trim function can remove blanks from character values. 但是这道dept 11个长，结果是Printing 75 这样blank就在中间了，怎能用trim呢？而且根据题目的输入的长度，number是missing的，又怎末能够得到Printing750这个结果呢？

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关键词：trim Rim Department Statements following 用法 trim

这个貌似是题目有错误吧， 哈哈

be careful!

是吗？题目出错了？

我也求解！