Expected expression before , token

Question

My code:

DrawText (hdc, TEXT ("PPPPPPP"), -1, &, DT_SINGLELINE|DT_CENTER|DT_VCENT);

Compiler gives me this erorr:

[Error] expected expression before ',' token

Thanks.

possible duplicate of [Expected identifier or something?](http://stackoverflow.com/questions/20809447/expected-identifier-or-something) — Raymond Chen, Dec 29 '13 at 22:13
This is like asking why your algebraic calculator doesn't accept the input `4 + `. — Andreas Rejbrand, Dec 29 '13 at 22:51

score 2 · Answer 1 · answered Dec 29 '13 at 21:55

2

That lonely & is the error, that's not correct syntax: the unary address-of operator & needs something to take the address of, and you're not providing an argument to the operator.

From this documentation page, the fourth argument to DrawText() is a pointer to a RECT structure which you seem to be missing.

Without seeing more of your code, it's hard to know what your particular RECT instance is called.

answered Dec 29 '13 at 21:55

unwind

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http://stackoverflow.com/questions/20809447/expected-identifier-or-something?noredirect=1#comment31200431_20809447 – Janac Dec 29 '13 at 22:03

haccks · Answer 2 · 2013-12-29T22:45:14.383

1

This is because you are using unary & operator without its operand. You need an operand (which must be an l-value) for & operator otherwise its a compilation error. If you declare the RECT structure then fourth argument is a pointer to RECT, like &rect;

 RECT rect;
 ...
 DrawText (hdc, TEXT("PPPPPPP"), -1, &rect, DT_SINGLELINE|DT_CENTER|DT_VCENT);

edited Dec 29 '13 at 22:45

answered Dec 29 '13 at 21:54

haccks

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With this I get error: [Error] lvalue required as unary '&' operand – Janac Dec 29 '13 at 21:56
@Janac; There was typo. Fixed that. – haccks Dec 29 '13 at 21:57
http://stackoverflow.com/questions/20809447/expected-identifier-or-something?noredirect=1#comment31200431_20809447 – Janac Dec 29 '13 at 22:00
What does that mean? That's a different issue what [chris](http://stackoverflow.com/users/962089/chris) stated in his comment. – haccks Dec 29 '13 at 22:02
@Janac Learn to use something called debugger – rullof Dec 29 '13 at 22:04
@haccks he's asking you to anser his other question – rullof Dec 29 '13 at 22:04
@rullof; lol. That is already answered. :) – haccks Dec 29 '13 at 22:05
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@haccks he didn't understood it yet – rullof Dec 29 '13 at 22:07
Can i just delet this & ??? – Janac Dec 29 '13 at 22:19
1

You have to pass five arguments to your function. After deleting that you should pass an argument expected by your function (like `&rect`). Read this [answer](http://stackoverflow.com/a/1974035/2455888) also. – haccks Dec 29 '13 at 22:35

Expected expression before , token

2 Answers2