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GeneralRe: char+char issues Pin
gamefreak229119-Apr-09 19:32
gamefreak229119-Apr-09 19:32 
Questionactivex dll problem [solved] Pin
maxMESA19-Apr-09 0:48
maxMESA19-Apr-09 0:48 
AnswerRe: activex dll problem Pin
Stuart Dootson19-Apr-09 1:47
professionalStuart Dootson19-Apr-09 1:47 
AnswerRe: activex dll problem Pin
maxMESA19-Apr-09 7:14
maxMESA19-Apr-09 7:14 
Questionpoint reference VS value Pin
sharion18-Apr-09 21:18
sharion18-Apr-09 21:18 
AnswerRe: point reference VS value Pin
Stuart Dootson18-Apr-09 22:53
professionalStuart Dootson18-Apr-09 22:53 
GeneralRe: point reference VS value Pin
sharion19-Apr-09 1:35
sharion19-Apr-09 1:35 
GeneralRe: point reference VS value Pin
Luc Pattyn19-Apr-09 1:49
sitebuilderLuc Pattyn19-Apr-09 1:49 
this is what occurs in sequence:

char* str = NULL;   // str is a char pointer, set to NULL
GetMemory(str);
     void GetMemory(char* p)  // p is a char pointer set to NULL
     p =  new char[100];      // the old p is overwritten by a new pointer, pointing to a 100 byte buffer
     *(p + 10) = 'a';         // the new p is used to write some into that buffer
     return;
... // back from GetMemory    // str has never been changed


and this is how the callee would be able to modify the caller's pointer

void GetMemory(char** p)    // accept pointer to pointer to char
{
    p =  new char[100];
}
int main()
{
   char* str = NULL; 
   GetMemory(&str);   // pass the address of str (=pointer to pointer)
   // str will have changed now


Smile | :)

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GeneralRe: point reference VS value Pin
Stuart Dootson19-Apr-09 1:52
professionalStuart Dootson19-Apr-09 1:52 
GeneralRe: point reference VS value Pin
sharion19-Apr-09 3:21
sharion19-Apr-09 3:21 
GeneralRe: point reference VS value Pin
Stuart Dootson19-Apr-09 3:52
professionalStuart Dootson19-Apr-09 3:52 
GeneralRe: point reference VS value Pin
Luc Pattyn19-Apr-09 4:05
sitebuilderLuc Pattyn19-Apr-09 4:05 
GeneralRe: point reference VS value Pin
Stuart Dootson19-Apr-09 4:24
professionalStuart Dootson19-Apr-09 4:24 
GeneralRe: point reference VS value Pin
Luc Pattyn19-Apr-09 4:37
sitebuilderLuc Pattyn19-Apr-09 4:37 
GeneralRe: point reference VS value Pin
Stuart Dootson19-Apr-09 4:56
professionalStuart Dootson19-Apr-09 4:56 
GeneralRe: point reference VS value Pin
Luc Pattyn19-Apr-09 5:00
sitebuilderLuc Pattyn19-Apr-09 5:00 
GeneralRe: point reference VS value Pin
Stuart Dootson19-Apr-09 5:04
professionalStuart Dootson19-Apr-09 5:04 
GeneralRe: point reference VS value Pin
sharion19-Apr-09 5:25
sharion19-Apr-09 5:25 
GeneralRe: point reference VS value Pin
Stuart Dootson19-Apr-09 7:15
professionalStuart Dootson19-Apr-09 7:15 
GeneralRe: point reference VS value Pin
sharion20-Apr-09 18:30
sharion20-Apr-09 18:30 
GeneralRe: point reference VS value Pin
Stuart Dootson20-Apr-09 19:40
professionalStuart Dootson20-Apr-09 19:40 
GeneralRe: point reference VS value Pin
sharion21-Apr-09 18:05
sharion21-Apr-09 18:05 
GeneralRe: point reference VS value Pin
Stuart Dootson21-Apr-09 21:39
professionalStuart Dootson21-Apr-09 21:39 
GeneralRe: point reference VS value Pin
sharion22-Apr-09 16:00
sharion22-Apr-09 16:00 
QuestionProblem with headers in VS 2008 [modified] Pin
mass8518-Apr-09 10:07
mass8518-Apr-09 10:07 

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