一個關(guān)于array的小問題

是 否 +2 論壇幣

k人 參與回答

經(jīng)管之家送您一份

應(yīng)屆畢業(yè)生專屬福利!

求職就業(yè)群

趙安豆老師微信：zhaoandou666

經(jīng)管之家聯(lián)合CDA

送您一個全額獎學(xué)金名額~ !

立即領(lǐng)取

感謝您參與論壇問題回答

經(jīng)管之家送您兩個論壇幣！

+2 論壇幣

93. This question will ask you to provide a line of missing code.
Given the following data set WORK.SALES:
SalesID SalesJan FebSales MarchAmt
------- -------- -------- --------
W6790 50 400 350
W7693 25 100 125
W1387 . 300 250
The following SAS program is submitted:
data WORK.QTR1;
set WORK.SALES;
array month{3} SalesJan FebSales MarchAmt;
<insert code here>
run;
Which statement should be inserted to produce the following output?
SalesID SalesJan FebSales MarchAmt Qtr1
------- -------- -------- -------- ----
W6790 50 400 350 800
W7693 25 100 125  250
W1387 . 300 250 550
A.Qtr1 = sum(of month{_ALL_});
B. Qtr1 = month{1} + month{2} + month{3};
C. Qtr1 = sum(of month{*});
D.Qtr1 = sum(of month{3});
Answer: C

請問下大家，為什么用C不用D？ 我選的D。
謝謝大家！

掃碼加我 拉你入群

請注明：姓名-公司-職位

以便審核進群資格，未注明則拒絕

分享0 收藏1 回帖

關(guān)鍵詞：array ARR Ray 小問題 following following question produce provide should

outside of ARRAY statement, month{3} is temp var which always refers to the 3rd var (i.e. "MarchAmt" here). So, D is not right answer.

goldbaodi 發(fā)表于 2015-2-27 00:04
outside of ARRAY statement, month{3} is temp var which always refers to the 3rd var (i.e. "MarchAmt" ...

謝謝！明白了！

求問，為什么A選項不對呢？