++1 是什么意思 [英] What does ++1 mean

问题描述

我刚刚看到有人发布了一些示例代码(here) 设置一个整数变量等于 ++1.我很震惊 VB.NET 编译器会接受它作为有效的语法.例如，这编译:

I just saw some sample code that someone posted (here) that set an integer variable equal to ++1. I was shocked that the VB.NET compiler would accept that as valid syntax. For instance, this compiles:

Dim i As Integer = 0
i = ++1
i = ++1
Console.WriteLine(i)  ' Outputs "1"

据我所知，它似乎忽略了优点而只使用它后面的值.例如:

As best I can tell, it seems to ignore the pluses and just use the value that follows it. For instance:

Dim i As Integer = 0
i = ++10
Console.WriteLine(i)  ' Outputs "10"

所以我的问题是，为什么这是有效的语法?+ 运算符是否有一些我完全不知道的规则.据我所知，这是无效的，而且 ++ 本身并不是 VB.NET 中的运算符.

So my question is, why is that valid syntax? Is there some rule for the + operator that I'm totally unaware of. As far as I knew, that was invalid and ++ was not, itself, an operator in VB.NET.

推荐答案

与其他一些语言不同，它只是一个标志.符号可以复制——+-++1 有效，---3 有效，Not Not Not Not 条件 也有效.

Unlike in some other languages, it’s just a sign. Signs can be duplicated – +-++1 works, ---3 works, and Not Not Not Not condition works as well.

这篇关于++1 是什么意思的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！