呵呵 如题啊

Returns the number of fields successfully converted and assigned; the return value does not include fields that were read but not assigned. A return value of 0 indicates that no fields were assigned. The return value is EOF for an error or if the end-of-file character or the end-of-string character is encountered in the first attempt to read a character.

from MSDN

太专业了,看不懂

LS是说scanf返回正确输入数据的个数,返回的值不包括读下来,但没分配给指定地址的数据.返回值为0表示没有任何一个数据被输入.如果出错,或在第一个字符被读入之前就遇到了输入缓冲的结尾或字符串的结尾,则返回EOF.