好心人帮我解释2句话什么意思

shiyiming

year2=input(compress(year(last_month)||'0101'),yymmdd10.);
        interval=intck('month',year2,last_month)+1;

shiyiming

year(last_month ) 返回年分,再将年连上0101, 随后将年0101, 变成numeric

第二条计算year2 和last_month之间有几个月 (+1)

shiyiming

compress什么作用

shiyiming

it is equivalent to

[code:l31sjgh3]interval = month(last_month);[/code:l31sjgh3]

isn't it?

****

shiyiming

Function compress() is to squeeze out blank spaces, in particular the leading ones, in the character.
That is why works on the following functions also: left(), strip(), scan(character, 1) and so on.