C / C++ / MFC

Paulraj G wrote:

Hwnd dlg;
SetDlgItemTextW(dlg,IDC_EDIT1,strName);

Pankaj D.Dubey wrote:

int i = 2;

i = ++i + (++i)

cout<<i;

logically the="" code="" should="" print="" value="" '7'="" but="" i="" am="" getting="" '8'="" as="" output.
why="" is="" it="" so?
<="" blockquote="">

Actually, 8 is just as a correct answer as 7. To research this, search for the term "sequence points".

In ++i + (++i) for each ++i, i is first incremented, then the value is used. Also, the add will be done last. This does not fully define the order of evaluation of everything - and the implementation is free to choose the rest of the order.

So it could do things in the order you were thinking of. Another equally valid order is:
do the first increment ( i gets 3),
do the second increment ( i gets 4 ),
add current i to current i (8)

The bottom line is that you shouldn't write expressions where parts of the expression have side effects that could alter the value of other parts of the expression.

Please do not read this signature.

i = v[i++];    // the value if 'i' is undefined
i = 7,i++,i++; // 'i' becomes 9

BSTR str[10];

for (int i = 0; i < 10; ++i)
    str[i] = ::SysAllocString(_T("String"));

MyFunction(str, 10);

mostafa_pasha wrote:

But when i try to compile the code or run the code under windows XP, the program crashes/ the compiler throw an exception.