操作符 <= (Less Than Or Equal)
 
比较一个小于或等于另一个表达式的表达式

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

如果左侧表达式小于或等于右侧表达式，则返回负数（-1），如果大于等于则返回0（0）。

说明

操作符 <=（小于或等于）是一个二进制运算符，它比较一个小于或等于另一个表达式的表达式，并返回结果 - 一个Integer形式的布尔值：对于true为负（-1），对于false为零（0） 。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

操作符>（大于）是运算符<= （小于或等于）的补充，与运算符 不（逐位补码）结合使用时功能完全相同。

   If (69 <= 420) Then Print "（69 <= 420）是真的。"
   If Not (60 > 420) Then Print "不是（420 >69）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