data d;
x=12345;
file 'c:\id.txt';
put x;
run;

运行通过了：
NOTE: The file 'c:\id.txt' is:
      File Name=c:\id.txt,
      RECFM=V,LRECL=256

NOTE: 1 record was written to the file 'c:\id.txt'.
      The minimum record length was 5.
      The maximum record length was 5.
NOTE: The data set WORK.D has 1 observations and 1 variables.
NOTE: DATA statement used:
      real time           0.03 seconds
      cpu time            0.03 seconds


为什么我在C盘里找不到id.txt？