囊者，本人在论坛发了一个帖子“常用抽样sas程序”
http://www.pinggu.org/bbs/viewthread.php?tid=392413&highlight=%B3%A3%D3%C3%B3%E9%D1%F9sas%B3%CC%D0%F2
后来发现里面很多地方字节过长，当时没注意到。
经过用options 选项后，最大可读入252字节，
例如
options ls=256;
data a;
length x$ 256.;
input x$ ;
cards;
abcdefgh10abcdefgh20abcdefgh30abcdefgh40abcdefgh50abcdefgh10abcdefgh20abcdefgh30abcdefgh40abcdefgh50abcdefgh10abcdefgh20abcdefgh30abcdefgh40abcdefgh50abcdefgh10abcdefgh20abcdefgh30abcdefgh40abcdefgh50abcdefgh10abcdefgh20abcdefgh30abcdefgh40abcdefgh50wxq001
;
proc print;run;
不知道那位老弟能设法使SAS读入字节>252？？？