错误：需要作为左操作数的赋值（C） [英] error: lvalue required as left operand of assignment (C)

问题描述

我看到这个问题的许多不同的答案，看了很多人，但我找不到我的问题的答案。

I see many different answers to this question and have looked at many of them yet I cannot find the answer to my problem.

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The error im getting is

bitarray.c:27:19: error: lvalue required as left operand of assignment

(newArr << i) ^= 1;

任何想法？
感谢

Any ideas? Thanks

推荐答案

您正在尝试为操作的结果分配另一个结果。尝试以下正确的方法：

You are trying to assign to a result from an operation another result. Try the following right way to do it:

newArr = (newArr << i) ^ 1;

这个想法是你必须有一个有效的lv值和< ;不是有效的。你需要一个变量，如newArr。 SO的以下答案解释了与这种情况相关的许多术语：

The idea is that you have to have a valid lvvalue and the temporary result of the "<<" is not a valid one. You need a variable like newArr. The following answer on SO explains many terms related to this situation:

什么是右值，左值，x值，glvalues和prvalues？

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