Error C2664 Cannot Convert Parameter From
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Error C2664 Cannot Convert Parameter 3
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Error C2664 Cannot Convert Parameter 1 From
them; it only takes a minute: Sign up error C2664: cannot convert parameter 1 from 'int' to 'int []' up vote 0 down vote favorite #include using namespace std; class amin { private: const int length = 10;
Error C2664 Cannot Convert Parameter 1 From 'const Char *' To 'char *'
int newArray[length]; int i; public: int deleteEvenNumber(int getArray[length]) { for (i = 0 ; i < length ; i++) { if (getArray[i] % 2 == 0) newArray[i] = getArray[i]; i++; }; return newArray[length]; }; }; main: int main() { amin manipulateArrays; int input , i = 0; const int length = 10; int mainArray[length]; cout<<"Please enter ten numbers :"<>input; mainArray[i] = input; i++; }; manipulateArrays.deleteEvenNumber(mainArray[length]); }; i error c2664 cannot convert parameter from const char to lpcwstr got these two errors: error C2664: 'amin::deleteEvenNumber' : cannot convert parameter 1 from 'int' to 'int []' IntelliSense: argument of type "int" is incompatible with parameter of type "int *" please help and explain about my mistake to me. and please introduce a good tutorial for this problem or this title to me. c++ casting share|improve this question edited Mar 3 '14 at 15:23 herohuyongtao 25.4k96691 asked Mar 3 '14 at 15:13 Amin Khormaei 492312 I would use a std::vector rather than arrays. –Nick Mar 3 '14 at 15:17 add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted Your function deleteEvenNumber() requires an int [] (i.e. int array), however you passed it an int to it. manipulateArrays.deleteEvenNumber(mainArray[length]); ^^^^^^^^^^^^^^^^^ | this is an 'int', not an 'int []' To also pass the length to the function, you may want to change your function to int deleteEvenNumber(int getArray[], int length) And then call it like: manipulateArrays.deleteEvenNumber(mainArray, length); Alternatively, you can use vector mainArray instead, and then you can easily get its length by mainArray.size(). share|improve this answer edited Mar 3 '14 at 15:21 answered Mar 3 '14 at 15:15 herohuyongtao 25.4k96691 And what about length? It won't compile... –Nick Mar 3 '14 at 15:17 1 @Nick Fixed. thanks. –herohuyongtao Mar 3 '14 at 15:20 1 +1. Good to see a mention of std::vector too! &ndas
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us error c2664 in visual c++ Learn more about Stack Overflow the company Business Learn more about hiring developers error c2664 visual studio or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack error c2664 cannot convert parameter 1 from 'const char *' to 'lpcwstr' Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up error C2664: cannot convert parameter 1 from http://stackoverflow.com/questions/22150353/error-c2664-cannot-convert-parameter-1-from-int-to-int 'X' to 'X' up vote 1 down vote favorite I have a C++/Win32/MFC project in Visual Studio 2008, and I'm getting a strange error message when I compile it. I've created a small project to demonstrate the problem, and the main code is #ifndef _MyObject_h #define _MyObject_h class MyObject { public: MyObject() { } }; #endif // _MyObject_h // --- END MyObject.h // --- BEGIN ObjectData.h #ifndef http://stackoverflow.com/questions/14713648/error-c2664-cannot-convert-parameter-1-from-x-to-x _ObjectData_h #define _ObjectData_h template class ObjectData { public: DataPolicy *data; ObjectData() : data(NULL) { } ObjectData(const ObjectData ©) : data(copy.data) { } ObjectData & operator=(const ObjectData ©) { this->data = copy.data; return *this; } }; #endif // _ObjectData_h // --- END ObjectData.h // --- BEGIN Tool.h #ifndef _Tool_h #define _Tool_h #include "ObjectData.h" template class Tool { private: ObjectData _object; public: Tool(ObjectData obj); }; #endif // _Tool_h // --- END Tool.h // --- BEGIN Tool.cpp #include "stdafx.h" #include "Tool.h" template Tool::Tool(ObjectData obj) : _object(obj) { } // --- END Tool.cpp // --- BEGIN Engine.h #ifndef _Engine_h #define _Engine_h #include "Tool.h" #include "MyObject.h" class Engine { private: MyObject *_obj; public: Engine(); ~Engine(); void DoSomething(); }; #endif // _Engine_h // --- END Engine.h // --- BEGIN Engine.cpp #include "stdafx.h" #include "Engine.h" Engine::Engine() { this->_obj = new MyObject(); } Engine::~Engine() { delete this->_obj; } void Engine::DoSomething() { ObjectData objData; objData.data = this->_obj; // NEXT LINE IS WHERE THE ERROR OCCURS Tool< ObjectData > *tool = new Tool< ObjectData >(objData); } // --- END Engine.cpp Errors: Engine.cpp c:\projects\myproject\myproject\engine.cpp(18) : error C2664: 'Tool::Tool(ObjectData)' : cannot convert parameter 1 from 'ObjectData' to 'ObjectData' with [ ObjectPolicy=ObjectData, DataPo
Verbs Diet Index 2010-03-28 Error C2664 LoadLibraryW cannot convert parameter to LPCWSTR I recently used http://www.aps.anl.gov/epics/tech-talk/2015/msg00180.php Microsoft Visual Studio 2008 to write a simple program to load a dynamic link library error c2664 (DLL) module and invoke some of its entry points. I did not expect to get the error message C2664 from the simple LoadLibrary statement:HINSTANCE hinstLib = LoadLibrary("azspellaid.dll"); Error C2664: 'LoadLibraryW': error c2664 cannot cannot convert parameter 1 from 'const char [15]' to 'LPCWSTR' There are two ways of fixing this problem. The first one is to cast the quoted string with a Long Pointer to Const Wide String (LPCWSTR):HINSTANCE hinstLib = LoadLibrary((LPCWSTR)L"azspellaid.dll"); The C2664 error can also be resolved by keeping the original code and changing the character set of the project defaults from "unicode character set" to "multi-byte character set" as shown in this image: © Copyright2012 - Antonio Zamora
2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 Core-talk Mailman Search 2016 QTi-talk Mailman Search 2016 Hw-talk Mailman Search 2016 Bugs Documents Links Licensing Format page for printing SearchTech-talk 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 <2015> 2016 Index 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 <2015> 2016 <== Date ==> <== Thread ==> Subject: RE: epicsRingPointer.h error C2664: 'delete' : cannot convert parameter From: "Mark S. Engbretson" To: "'Johnson, Andrew N.'" Cc: "'EPICS Tech-Talk'" Date: Mon, 2 Feb 2015 19:06:12 -0600 It's only a problem because someone made it so. Even Microsoft says - If you have functions in a DLL written in C++ that you want to access from a C-language module, you should declare these functions with C linkage instead of C++ linkage. Unless otherwise specified, the C++ compiler uses C++ type-safe naming (also known as name decoration) and C++ calling conventions, which can be difficult to call from C. Problem solved. You can access DLL function entries by ordinal value if you had to, and so long as the parameters, types, and calling conventions are agreed upon everything still works. The fact that every compiler name mangles their c++ classes differently shows that actually exporting a c++ class in a dll is probably not the correct thing to do at the end of the day if you don't want to hand out sources, or start building libraries for major compiler players. Just wrapper or shim or cdecl the minimal functions that you need and move on . People using Easy Channel Access do it all the time . . . . If people had coded this right, a single DLL , 1 header file, and the produced 'glue' lib exported from the DLL is all that anyone would need. You don't have to export EVERYTHING. -----Original Message----- From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Johnson, Andrew N. Sent: Monday, February 02, 2015 5:43 PM To: Engbretson, Mark S. Cc: EPICS Tech-Talk Subject: Re: epicsRingPointer.h error C2664: 'delete' : cannot convert parameter Hi Mark, A DLL that only exports a C++ class can only be called by a program that is built using a compatible ABI, which for Microsoft means the compilers must have the same major version number. The Gnu policy on their C++ ABI has long stressed compatibility between versions, in contrast to Microsoft's policies. A