data tese;
length city$ 10;
label city='城市' zip='邮编';
input city$ zip;
put city zip;
cards;
birmingham 35201
montgomery 34101
;
run;
data tese;
length city$ 10;
label city='城市' zip='邮编';
input city$ zip;
put city zip;
cards;
birmingham 35201
montgomery 34101
run;
这两个的输出结果为什么会不一样,数据读取完不要要;的吗???