C++ 返回一个赋值? [英] C++ returning an assignment?

问题描述

在 C++ 中，函数返回赋值是什么意思?例如

In C++ what does it mean when a function returns an assignment? e.g.

int a = ...;
int b = ...;
int some_function(p)
{
    return a = b;
}

推荐答案

在这种情况下它执行赋值，然后返回b.

In this case it performs the assignment, then returns b.

这类东西可能会被编译器标记为一个无意的错误，通常你的意思是 a == b，所以你可能需要处理它.将其作为单独的一行进行，可以清楚地表明这是有意为之.

This sort of stuff might get flagged by the compiler as an inadvertent bug, usually you'd mean a == b, so you may need to deal with that. Doing it as a separate line makes it clear it's intentional.

这篇关于C++ 返回一个赋值?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！