什么是& =和| =

问题描述

我正在大型代码库中浏览一些VC ++代码，并遇到了这个问题:

I was going through some VC++ code in a large code-base and came across this:

    if (nState & TOOL_TIPS_VISIBLE)
        nState &= ~TOOL_TIPS_VISIBLE;
    else
        nState |= TOOL_TIPS_VISIBLE;
    break;

在C ++中是否有& =或| =这样的运算符?它是做什么用的?
等于nState = nState & ~TOOL_TIPS_VISIBLE吗?

Is there any such operator as &= or |= in C++? What is it for?
Is it the equivalent of nState = nState & ~TOOL_TIPS_VISIBLE?

推荐答案

x &= y与x = x & y
相同x |= y与x = x | y

x &= y is the same as x = x & y
x |= y is the same as x = x | y

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