int a =++i+++i;这个是未定义的吗？

yifangyou

这样写的人该踢

fender0107401

这是一个欠抽的**行为。

没有人在实际中这么写。

扫地大妈

回复 2# pmerofc


    还左值?
没有过Left-Value, 只有Location-Value
锈逗了

变异老鼠

回复  pmerofc


    还左值?
没有过Left-Value, 只有Location-Value
锈逗了
扫地大妈 发表于 2011-06-27 15:49

既没有左值，也没有右值。没有 Left-Value，也没有 Location-Value。只有 lvalue 和非 lvalue，满意了不？

如果你认为 lvalue 指的是 Location-Value，请给出你的论据。

OwnWaterloo

为了防止某秀逗君妖言惑众， 再次将相关条款贴在就近位置：

c99 6.3.2.1 Lvalues, arrays, and function designators
53 )
The name ‘‘lvalue’’ comes originally from the assignment expression E1 = E2,
in which the left operand E1 is required to be a (modifiable) lvalue.
It is perhaps better considered as representing an object ‘‘locator value’’.
What is sometimes called ‘‘rvalue’’ is in this International Standard described as the ‘‘value of an expression’’.

c89 6.2.2.1 Lvalues and function designators
31 )
The name ``lvalue'' comes originally from the assignment expression E1 = E2 ,
in which the left operand E1 must be a (modifiable) lvalue.
It is perhaps better considered as representing an object ``locator value.''
What is sometimes called ``rvalue'' is in this Standard described as the ``value of an expression.''

1. 没有 left-value 与 right-value
2. 也没有location-value
3. 只有 lvalue(locator value) 与 rvalue
4. 中文如何翻译？ 这就见仁见智了。
左值/右值？  还是 位置值/表达式值？