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Cannot Allocate An Array Of Constant Size 0 Visual Studio

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Browse other questions tagged c++ compiler-construction syntax or ask your own question. Please don't PM me for help - and no, I don't do help over instant messengers. Originally Posted by Adak io.h certainly IS included in some modern compilers. I was just goofing around with sorting arrays, blah blah blah. his comment is here

VLA are a C99 feature, only present as an extension in some C++ compilers (and on its way to be partially added to C++14 under a different name). Is privacy compromised when sharing SHA-1 hashed URLs? allocate an array P: n/a Simon Hello everybody, I've got a problem. You signed in with another tab or window. http://stackoverflow.com/questions/9881777/why-do-i-get-cannot-allocate-an-array-of-constant-size-0

Cannot Allocate An Array Of Constant Size 0 Visual Studio

int x[10]; // ok! char array[length]; could just blow away your stack and leave you with nothing but wreckage. i = strlen(ch); array(i); .... } int array ( int n ){ int a[n]; .... } but when i compile: error C2057: expected constant expression error C2466: cannot allocate an array Originally Posted by Adak io.h certainly IS included in some modern compilers.

  1. a lot.
  2. Join them; it only takes a minute: Sign up C++ WCHAR: Cannot allocate an array of constant size 0 up vote 1 down vote favorite I'm trying to create a WCHAR:
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  4. Why doesn't my simple program work???
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  6. Dinamically allocate array of array of structures dynamically allocate a multidimensional array Where to allocate memory for the char * data member ...
  7. Similar topics dynamically allocate array variable of type LPWSTR dynamically allocate array variable type LPWSTR "error C2057: expected constant expression", "error C2466: cannot allocate an array of constant size 0".
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  9. The constant expression for the array size must be an integer greater than zero.

That worked. I'm trying to allocate an array inside a function with Parameter int n: main(){ int i; ... how to allocate memory dyamically for multidimensional array allocate 2d array in function and return it to caller Browse more C / C++ Questions on Bytes Question stats viewed: 17307 replies: Std::vector Retagging as C since the code seems to be so. –Mike Kwan Mar 27 '12 at 0:32 3 @MikeKwan: Guys, don't retag as C because he is using a C++

If you want a variable sized array then you need to dynamically allocate it (or, better yet; just use a vector). Error C2057: Expected Constant Expression Default value for date field How safe is 48V DC? Nov 13 '05 #1 Post Reply Share this Question 3 Replies P: n/a Marc Boyer Simon wrote: Hello everybody, int array ( int n ){ int a[n]; ... } but when In this particular case, I'd guess that just modifying the input array is another option. -- Mats Compilers can produce warnings - make the compiler programmers happy: Use them!

Originally Posted by Salem You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much. A vector is basically a C++ array, although it automatically resizes itself to suit the number of elements you wish to add to it, and has accessor methods with bounds checking. Simon wrote: I've got a problem. Second, you cannot allocate an array statically with a size of 0, but that's another issue (although std::array allows you doing that).

Error C2057: Expected Constant Expression

Originally Posted by Salem You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much. http://www.cplusplus.com/forum/beginner/28082/ share|improve this answer answered Jun 8 '10 at 21:54 GManNickG 234k29349471 add a comment| up vote 0 down vote You are trying to create a variable sized array on the stack. Cannot Allocate An Array Of Constant Size 0 Visual Studio Indeed - and for anyone using Visual C++ (Which is what it looks like, based on the debugger output shown), its unnecessary, because [CTRL] + [F5] .. 'a.k.a.' Start without debugging Error C2466 Cannot Allocate An Array Of Constant Size 0 Visual Studio I'm trying to allocate an array inside a function with Parameter int n: main(){ int i; ....

Today's Topics Dream.In.Code > Programming Help > C and C++ cannot allocate an array of constant size 0init array to rand size Page 1 of 1 New Topic/Question Reply 10 Replies this content In the next C++ standard (C++0x), you will be able to define functions as const-expressions. Creating a game, from start to finish Recent additions How to create a shared library on Linux with GCC - December 30, 2011 Enum classes and nullptr in C++11 - more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Error 1 Error C2466: Cannot Allocate An Array Of Constant Size 0

Code: char *destString = malloc(length * sizeof(char)); However, I would like an array and not a pointer to an array of characters. Yeah I know STLs are a lot better but can't use them for what I was doing. How safe is 48V DC? weblink Was This Post Helpful? 0 Back to top MultiQuote Quote + Reply #7 BrainStew D.I.C Head Reputation: 1 Posts: 154 Joined: 02-August 07 Re: cannot allocate an array of constant

Thanks This post has been edited by BrainStew: 21 August 2007 - 01:30 PM Was This Post Helpful? 1 Back to top MultiQuote Quote + Reply #4 Amadeus g+ + Can variation ratio ever be 0? Mar 27 '12 at 16:41 | show 1 more comment 1 Answer 1 active oldest votes up vote 6 down vote accepted int VMatriz[n][m]={0}; This is illegal.

I'm trying to allocate an array inside a function with Parameter int n: main(){ int i; ...

By spentdome in forum C Programming Replies: 25 Last Post: 05-27-2002, 07:49 PM -- Normal Style -- Mobile Style -- Default Mobile Style Contact Us C and C++ Programming at Cprogramming.com If those answers do not fully address your question, please ask a new question. 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 How difficult is it to practically detect a forgery in a cryptosystem?

Hot Network Questions Why does the size of this std::string change, when characters are changed? All rights reserved. Does f:x mean the same thing as f(x)? check over here Another problem is, how can I read my input char by char, so I can save it in my array?

If you need to make sure it has a certain number of bytes, you can either do that when you construct it: std::wstring baz(bufferSize, ' '); or you can use the What's the most robust way to list installed software in debian based distros? Terms Privacy Security Status Help You can't perform that action at this time. But in C, no such thing is possible.

Outside of your DOS world, your header file is meaningless. 05-10-2008 #3 steve1_rm View Profile View Forum Posts UK2 Join Date Sep 2003 Posts 112 Hello, That worked ok with the Build me a Brick Wall! This is why it does not compile. I must be too tired or something. #include #include int main(void) { srand((unsigned)time(NULL)); int iRand_Num = rand()%20+1; int iArray[iRand_Num] = {0}; system("pause"); } C++ doesn't support VLA's.

I'm trying to initialize an array to a random size between 1 and 20. That's a C99 feature. Get Started with C or C++ C Tutorial C++ Tutorial Get the C++ Book All Tutorials Advanced Search Forum General Programming Boards C Programming Cannot allocate an array of constant size Dev centers Windows Office Visual Studio Microsoft Azure More...