Excel中三个IF语句

我需要编写一个IF函数来执行以下操作。 我有两个参数：

A: x B: x If "A1" is "x" and "B1" is "" -> "1" If "B1" is "x" and "A1" is "" -> "2" If "A1" and "B1" is "x" -> "3" If in "A1" and "B1 is nothing -> "4" 

我想出了这个function，但它不能正常工作：

 =IF(A1="x";"1";IF(B1="x";"2";IF(A1="x";"3";"4"))) 

Answer 1

=IF(AND(A1="x",B1="x"),"3",IF(AND(A1="x",B1=""),"1",IF(AND(A1="",B1="x"),"2","4")))

Answer 2

尝试这个：

 =IF(AND(A1="x",B1=""),1,IF(AND(B1="x",A1=""),2,IF(AND(A1="x",B1="x"),3,4))) 

编辑提出一个空白的情况下没有任何规定的input：

 =IF(AND(A1="x",B1=""),1,IF(AND(B1="x",A1=""),2,IF(AND(A1="x",B1="x"),3,IF(AND(A1="",B1=""),4,"")))) 

Answer 3

 =1+MOD(LEN(A1&B1&B1)+3,4)