警告：逗号表达式的左操作数无效 [英] warning: left-hand operand of comma expression has no effect

问题描述

我看到此警告
如何解决它？

i see this warning How to do fix it?

Temp += (Table[i, temp3] - (MSB[i] ^ 0x1));

警告：逗号表达式的左操作数无效

warning: left-hand operand of comma expression has no effect

推荐答案

什么是Table对象？如果是二维数组，则应该写

what is Table object? If it is 2-dimensional array then you should write

Table[i][temp3]

在您的代码中

[i, temp3]

是逗号运算符-计算第一个参数（i），将其忽略并返回temp3，因此如果Table是接受单索引来访问其对象的某种容器，则可以删除i

is a comma operator - it evaluates the 1st parameter (i), ignores it and returns temp3, so you can just drop i if Table is some kind of container that accepts single-index to access its objects

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