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C2057 C++


share|improve this answer answered Dec 13 '12 at 19:35 JBentley 3,72731547 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign may be that will help you . If there was another constructor that allowed a different size, then the compiler could not assume that size was always 4096, so it gives the compile-time error instead. Seasonal Challenge (Contributions from TeXing Dead Welcome) What is an instant of time?

Esker" mean? error C2057: expected constant expression error C2466: cannot allocate an array of constant size 0 error C2087: 'idM' : missing subscript. If you know it only at run time you will have to malloc some memory yourself instead. Thanks a lot for helping me. https://msdn.microsoft.com/en-us/library/eff825eh.aspx

C2057 C++

Defining a custom TikZ arrowtip (circle with plus) Can Wealth be used as a guide to what things a PC could own at a given level? Using "están" vs "estás" when refering to "you" Read past end of file to recover data Starting freelancer career while already having customers Coding Standard - haphazard application Am I interrupting Using "están" vs "estás" when refering to "you" My 21 yr old adult son hates me Quicker and quieter than a mouse, what am I? So, you might consider to use malloc (or stl vector if you use c++).

ExampleThe following sample generates C2057 and shows how to fix it: Copy // C2057.cpp int i; int b[i]; // C2057 - value of i is unknown at compile time int main() Check your man pages carefully for the library routines you are calling. Isn't the 'const' required in the above context? >"ComeauTest.c", line 7: error: constant value is not known int arr[T]; ^ Why is that? Dynamic Array C++ Jan 21 '07 #7 P: n/a Clark S.

Does all "#define" perform in a same way? Error C2466: Cannot Allocate An Array Of Constant Size 0 How to restrict InterpolatingFunction to a smaller domain? Is it because of this? –Ava Sep 5 '11 at 13:51 @Richa, that sounds more like something .net than C. http://stackoverflow.com/questions/17459002/vs2008-error-expected-constant-expression-on-declaring-array-but-no-error-for-t Yet Another, Another Prime Generator Positional Bathroom Etiquette What is the parentage of Gil-galad?

Because, in the example case, there is no way that the "size" value can be something else then 4096. –Jean-Philippe Jodoin Aug 1 '12 at 19:04 2 The compiler will C++ Vector Grant 3,01611218 How would I change the code to get around this? –justin Nov 16 '11 at 3:30 1 @Justin malloc or alloca –IronMensan Nov 16 '11 at But I think you might be on to something as far as tweaking Visual Studio. –Jon Reid Dec 16 '10 at 6:25 1 @Jon : gcc supports C99 and Variable Although this program is legal: unsigned int const i = 3.14159; typedef char array[i]; int main() { array A; } Greg Jan 22 '07 #13 P: n/a Kai-Uwe Bux Greg wrote:

Error C2466: Cannot Allocate An Array Of Constant Size 0

You're now being signed in. http://stackoverflow.com/questions/11765677/c2057-error-on-const-value-definie-in-constructor-inialization-list more hot questions question feed lang-cpp about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation C2057 C++ It happens that C++ was forked from c89, so it's easy for C++ compilers to offer a C89 mode for legacy C code. C++ Expected Constant Expression Thanks!

c visual-studio-2008 vector share|improve this question asked Sep 5 '11 at 3:47 Ava 1,651154175 Just wanted to notify that it is a compiler-dependent problem, try it with gcc (C99), It would be a bigger head-scratcher if the code compiled with one constructor, but broke with two constructors. –Prashant Kumar Aug 1 '12 at 19:06 Yeah, good point. I had stored the files in wrong location. Not the answer you're looking for? C Malloc Array

I don't think so. Coding Standard - haphazard application A question concerning Wolfram Alpha Are there textual deviations between the Dead Sea Scrolls and the Old Testament? Browse other questions tagged c++ arrays visual-c++ visual-studio-2008 const or ask your own question. Compile error when adding a constructor would definetly be weird ! –Jean-Philippe Jodoin Aug 1 '12 at 19:10 add a comment| up vote 2 down vote Having a const data member

And using gcc this is compiled without errors. So, it's value can differ at some other point. Sarath Dorbala replied Apr 7, 2011 @Vikram Try dynamic memory allocation. (Use "new" operator if c++ or use malloc if c and it should solve the problem).

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The compiler is usually known as Visual C++. How does Energy Field interact with effects that say you lose life? char arr[a]; share|improve this answer answered Dec 14 '09 at 12:35 AraK 52.6k25128211 1 You mean they're concentrating on C#? –Marcin Gil Dec 14 '09 at 12:52 4 No, Then the compiler will happly accept your code and compile.

Why didn’t Japan attack the West Coast of the United States during World War II? Integer function which takes every value infinitely often Advisor professor asks for my dissertation research source-code Is there any way to bring an egg to its natural state (not boiled) after phidax replied Apr 7, 2011 void matrix(int dim, double idM[][dim]) { for (int i = 0; i < dim; i++) { for (int j = 0; j < dim; j++) { Quicker and quieter than a mouse, what am I?

Pete Becker

Arrays in C/C++ need to have a size that is known at compile-time. This is why you cannot use your size to define array size in C++. Floating literals (2.13.3) can appear only if they are cast to integral or enumeration types. If it does, then could I suppose that "#define" is expanded and calculated at complie-time?

so..... ///////// allocation //////////// int **abc = (int **) malloc( rows * sizeof(int *)); for(int i = 0; i

Browse other questions tagged c++ enums compiler-errors visual-studio-2012 or ask your own question. Why was Vader surprised that Obi-Wan's body disappeared? I tried using vector s[sizes] but of no avail.