W为何值？请讲明为什么 谢谢大家！！

Question

W=Choose(Weekday(“2007,5,1”),”Red”,”Green”,”Blue”,”Yellow”)

Answer 1

返回Blue
Weekday函数返回一个日期的星期数..
2007,5,1是星期二.所以WeekDay函数返回3(VB把星期天做为一星期的第一天).
Choose函数第一个参数是选择第几个,其他的都是待选的参数列表了.
选第三项.BLUE

Answer 2

W=Choose(Weekday(“2007,5,1”),”Red”,”Green”,”Blue”,”Yellow”) 
分解
a=weekday("2007-5-1")= 3 
w=choose(3,"red","green","blue")
因此w="blue"