嘿我尝试使用if else语句在用户输入操作符中进行编码。
If (Operator == "")
Operator = + ;
Else if (Operator == "")
Operator = - ;
Else if (Operator == "")
Operator = * ;
这是我认为应该的。谢谢你的帮助。
答案 0 :(得分:1)
所以你想根据你指定为字符串的运算符对一系列值执行操作,对吗?
在这种情况下,您可以根据运算符的值定义自定义函数。例如,假设您想要操作两个值:
Dim OperatorFunc as Func(of Integer, Integer, Integer)
Dim TheOperator as String
TheOperator = "*" 'Just an example, you get the value from anywhere
If (TheOperator = "+")
OperatorFunc = Function(x as Integer, y as Integer) x+y
Else if (TheOperator = "-")
OperatorFunc = Function(x as Integer, y as Integer) x-y
Else if (TheOperator = "*")
OperatorFunc = Function(x as Integer, y as Integer) x*y
End if
然后你就这样使用它:
Dim Result as Integer
Result = OperatorFunc(2, 3)
这是一个基本的例子,你也可以使用函数字典而不是if-elses的级联(也会更具可读性)。