data qian1;
set qian1;
if date le "21may10"d then code="if1005" inter=intck("day",date,"21may10"d);
else if date le "18jun10"d then code="if1006" inter=intck("day",date,"18jun10"d);
else date le "16jul10"d then code="if1007" inter=intck("day",date,"16jul10"d);
run;
问:then后面接两个赋值等式显示出错。有什么解决方法?