The followingSAS program is submitted:

  dataWORK.TEMP;

     length A B3 X;   

     infileRAWDATA;   

     input A BX;

  run;

  What is thelength of variable A?      

A. 3   

B. 8   

C.WORK.TEMP isnot created - X has an invalid length.

D. Unknown.

请问为什么答案上写A是答案呢?

length A B 3 X; 里X没有被assign length

不是应该是C吗?