Click here to Skip to main content
16,021,905 members
Home / Discussions / C / C++ / MFC
   

C / C++ / MFC

 
QuestionWhy can't variables be declared in a switch statement Pin
tracyhe12313-May-18 20:34
tracyhe12313-May-18 20:34 
AnswerRe: Why can't variables be declared in a switch statement Pin
Richard MacCutchan13-May-18 20:58
mveRichard MacCutchan13-May-18 20:58 
Questionwhy passing argument by reference(&ref) in a template function shows error ? but works fine if arguments passed by pointer(*ptr) ? Pin
Tarun Jha13-May-18 1:46
Tarun Jha13-May-18 1:46 
AnswerRe: why passing argument by reference(&ref) in a template function shows error ? but works fine if arguments passed by pointer(*ptr) ? Pin
CPallini13-May-18 2:56
mveCPallini13-May-18 2:56 
GeneralRe: why passing argument by reference(&ref) in a template function shows error ? but works fine if arguments passed by pointer(*ptr) ? Pin
Tarun Jha26-May-18 9:50
Tarun Jha26-May-18 9:50 
GeneralRe: why passing argument by reference(&ref) in a template function shows error ? but works fine if arguments passed by pointer(*ptr) ? Pin
CPallini26-May-18 10:53
mveCPallini26-May-18 10:53 
Questionproblem encountered by calling constructors explicitly. Pin
Tarun Jha11-May-18 10:20
Tarun Jha11-May-18 10:20 
AnswerRe: problem encountered by calling constructors explicitly. Pin
Joe Woodbury11-May-18 11:39
professionalJoe Woodbury11-May-18 11:39 
The program shouldn't run as is. In your second constructor, you aren't allocating the memory for the vector. (You also aren't deleting that memory in a destructor.)

Also note that you construct the v object in the default constructor. Since there is no assignment operator AND the second constructor is not marked explicit, it is creating a second instance of Vector and then member-wise copying that to the first, clobbering the allocation of v in the first instance. (Why your compiler is letting you get away with this is a mystery to me.)

So, add a destructor and then put "explicit" in front of the second constructor.

Then, remove the assignments and replace the declaration line with: v1(x), v2(y).

(It's still messy code, but in a debugger, you can now see how you are explicitly calling the second constructor and never the first.)
GeneralRe: problem encountered by calling constructors explicitly. Pin
Tarun Jha11-May-18 11:57
Tarun Jha11-May-18 11:57 
AnswerRe: problem encountered by calling constructors explicitly. Pin
CPallini12-May-18 4:13
mveCPallini12-May-18 4:13 
Questionvs2005 Form window Error C2039 Pin
jimNLX11-May-18 6:31
jimNLX11-May-18 6:31 
AnswerRe: vs2005 Form window Error C2039 Pin
Victor Nijegorodov11-May-18 7:23
Victor Nijegorodov11-May-18 7:23 
GeneralRe: vs2005 Form window Error C2039 Pin
jimNLX11-May-18 7:28
jimNLX11-May-18 7:28 
GeneralRe: vs2005 Form window Error C2039 Pin
Victor Nijegorodov11-May-18 8:07
Victor Nijegorodov11-May-18 8:07 
QuestionWhy do I need typecast hex? Pin
Vaclav_11-May-18 5:18
Vaclav_11-May-18 5:18 
AnswerRe: Why do I need typecast hex? Pin
Richard MacCutchan11-May-18 6:25
mveRichard MacCutchan11-May-18 6:25 
GeneralRe: Why do I need typecast hex? Pin
Vaclav_11-May-18 6:34
Vaclav_11-May-18 6:34 
Questionconst char [] and char[] difference question Pin
focusdoit10-May-18 14:26
focusdoit10-May-18 14:26 
QuestionRe: const char [] and char[] difference question Pin
David Crow10-May-18 17:22
David Crow10-May-18 17:22 
AnswerRe: const char [] and char[] difference question Pin
Richard MacCutchan10-May-18 21:25
mveRichard MacCutchan10-May-18 21:25 
AnswerRe: const char [] and char[] difference question Pin
Victor Nijegorodov10-May-18 23:03
Victor Nijegorodov10-May-18 23:03 
GeneralRe: const char [] and char[] difference question Pin
samzcs11-May-18 2:24
samzcs11-May-18 2:24 
QuestionPlease advise me on C++ coding structure Pin
Vaclav_9-May-18 4:24
Vaclav_9-May-18 4:24 
AnswerRe: Please advise me on C++ coding structure Pin
leon de boer9-May-18 4:44
leon de boer9-May-18 4:44 
QuestionHelp with C Pin
Faith Burnett5-May-18 10:28
Faith Burnett5-May-18 10:28 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.