操作符 <> (Not Equal)
 
比较两个不等式的表达式

语法

Declare Operator <> ( ByRef lhs As Byte, ByRef rhs As Byte ) As Integer
Declare Operator <> ( ByRef lhs As UByte, ByRef rhs As UByte ) As Integer
Declare Operator <> ( ByRef lhs As Short, ByRef rhs As Short ) As Integer
Declare Operator <> ( ByRef lhs As UShort, ByRef rhs As UShort ) As Integer
Declare Operator <> ( ByRef lhs As Integer, ByRef rhs As Integer ) As Integer
Declare Operator <> ( ByRef lhs As UInteger, ByRef rhs As UInteger ) As Integer
Declare Operator <> ( ByRef lhs As LongInt, ByRef rhs As LongInt ) As Integer
Declare Operator <> ( ByRef lhs As ULongInt, ByRef rhs As ULongInt ) As Integer

Declare Operator <> ( ByRef lhs As String, ByRef rhs As String ) As Integer
Declare Operator <> ( ByRef lhs As ZString, ByRef rhs As ZString ) As Integer
Declare Operator <> ( ByRef lhs As WString, ByRef rhs As WString ) As Integer

Declare Operator <> ( ByRef lhs As T , ByRef rhs As T ) As Integer

用法

result = lhs <> rhs

参数

lhs
左侧表达要比较。
rhs
右边的表达要比较。
T
任何指针类型。

返回值

如果表达式不相等，则返回负数（-1），否则返回0（0）。

说明

操作符 <>（不相等）是一个二进制运算符，用于比较两个不等式的表达式并返回结果 - 一个布尔值，形式为Integer：负数（-1）为真，零（0）为假。参数没有任何修改。

该运算符也可以被重载以接受用户定义的类型。

例子


Dim As String a = "你好", b = "世界"
Dim As Integer i = 10, j = i

If (a <> b) Then
  Print a & "不等于" & b
End If

If (i <> j) Then
  Print "错误：" & i & "不等于" & j
End If

运算符=（Equal）是运算符<>（不等于）的补码，与运算符 不（逐位补码）组合时功能完全相同。

   If (69 <> 420) Then Print "（420 <>420）是真的。"
   If Not (69 = 420) Then Print "不（69 = 420）是真的。"


方言差异

  • 在-lang qb 方言中，此运算符无法重载。

与QB差别

  • 没有

参考