syntax errors

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117. The following SAS program is submitted:
data work.totalsales (keep = monthsales{12} );
set work.monthlysales (keep = year product sales);
array monthsales {12} ;
do i=1 to 12;
monthsales{i} = sales;
end;
run;
The data set named WORK.MONTHLYSALES has one observation per month
for each of five years for a total of 60 observations.
Which one of the following is the result of the above program?
A00-211
- 36 - http://www.ePlanetLabs.com
A. The program fails execution due to data errors.
B. The program fails execution due to syntax errors.
C. The program executes with warnings and creates the WORK.TOTALSALES
data set.
D. The program executes without errors or warnings and creates the
WORK.TOTALSALES data set.
Answer: B
为何选b 呢？

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关键词：SYNTAX Errors Error err tax SYNTAX Errors

keep = monthsales{12}

这一句有问题，如果想要引用数组中的变量，要用 monthsales1-monthsales12，而不是monthsales{12}。当然假如不是12，是1或者2 的话，那选择A就是正确的了，但很显然程序中数据是没有问题的，只是语法不对。

是不是可以这样理解：monthsales{12}是array name,然而monthsales1-12是variables name?

可以，[em01]