C / C++ / MFC

«_Superman_» wrote:

1 and 3 fails because you're passing a DWORD** instead of DWORD*.

GC104 wrote:

ReadFileStatus = ReadFile(SerialPortHandle, &ReceiverBuffer, NumberOfBytes2Read, pActualBytesRead, NULL)
-won't compile, even though I am passing a pointer to a 'DWORD'?

GC104 wrote:

ReadFileStatus = ReadFile(SerialPortHandle, &ReceiverBuffer, NumberOfBytes2Read, *pActualBytesRead, NULL)
-won't compile?

ULARGE_INTEGER currPos;
LARGE_INTEGER offset;
offset.QuadPart = 0;
istreamInterfacePointer->Seek(offset, STREAM_SEEK_CUR, &currPos);

MyClass a;
MyClass b(a);  // Copy Constructor
MyClass c = b; // Copy Constructor
MyClass d;
d = c;         // Assignment Operator

hrishiS wrote:

I mean when do we use copy constructor and when assignment operator

Cedric Moonen wrote:

smarter "copy" mechanism (for instance your class contains a pointer which should be recreated instead of simply assigning the same address).

string var1 = "test";
string var2 = var1;
var2.replace(....);

int i;<br />
i = 10;

hrishiS wrote:

But could you please differentiate these with respect to shallow copy and deep copy?...and why we say so?

void ToStr(CString& val)
{
    val = "test";
}

void fun()
{
    CString val;
    ToStr(val);
}