lvalue

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Adding hardcoded value to contentSize

I\'ve been trying to make my scrollview correctly fit it\'s content which includes a label, UIImageView, and textview. The textview sizes dynamically to different text, so I\'ve made the scrollview\'s[详细]

2023-03-08 18:42 分类：问答
C++: is return value a L-value?

Consider this code: struct foo { int a; }; foo q() { foo f; f.a =4; return f;} int main() { foo i; i.a = 5; q() = i;[详细]

2023-03-07 21:21 分类：问答
Expression must be a modifiable L-value

I have here char text[60]; Then I do in an if: if(number == 2) text = \"awesome\"; else text = \"you fail\";[详细]

2023-03-05 20:13 分类：问答
The difference between "&(epage->incoming[0]) = spage;" and "&(epage->incoming[p2]) = spage;"

The last line of this particular code block produces the error \"lvalue required as left operand of assignment\". The confusion lies in why the last line throws this error while the second to last lin[详细]

2023-03-05 09:09 分类：问答
Would these C-pointer operations cause problems?

Let\'s say I\'ve got that: char *p = NULL; I\'m sure this one would b开发者_运维知识库e a problem as I\'d be dereferencing a NULL pointer:[详细]

2023-03-03 07:23 分类：问答
What's the deal with temporary objects and references?

One can frequently read that you cannot bind normal lvalue reference to temporary object. Because of that one can frequently see methods of class A taking const A& as a parameter when they don\'t[详细]

2023-03-03 05:08 分类：问答
More LValue Errors

Below is a triple nested indexing scheme.My pointer to an array of pointers is dereferenced on the commented line... in theory this should give me a pointer.I subtract one from it and then reference i[详细]

2023-02-19 03:22 分类：问答
LValue Error When Trying to Reference Value in C

Here\'s one that\'s sure to be fun for someone.So I have an array of objects (in my test/demo code here, I just make them doubles for simplicity) and then I create an array of pointers to these object[详细]

2023-02-19 02:58 分类：问答
Why doesn't a+++++b work?

int main () { int a = 5,b = 2; printf(\"%d\",a+++++b); return 0; } This code gives the fol开发者_开发问答lowing error:[详细]

2023-02-17 23:27 分类：问答
Different types of *-values [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: What are rvalues, lvalues, xvalues, glvalues, and prvalues?[详细]

2023-02-17 12:14 分类：问答