C / C++ / MFC

Raj Prathap wrote:

Number of elements are int/long.

Raj Prathap wrote:

Number of elements are int/long.

jhwurmbach wrote:

Actually, I would expect the count of elements in a collection to be a unsigned value. I can't imagine a use for a negative count.

     n  > 0 -- collection now contains n elements
     n == 0 -- collection now contains no elements
     n  < 0 -- error manipulating collection

jhwurmbach wrote:

Asking for the number of elements can only return a number. There is no possible error case.

James R. Twine wrote:

The object could be in a state where it is not yet associated with, or has been detached from, an array. Asking the object for the number of elements should return... What?

James R. Twine wrote:

Returning zero means that the collection has a size of zero, not that there is no collection.

jhwurmbach wrote:

0. No elements would be retrievable.
Why sould the "GetSize"-function answer a question other than that "How many elements are in the collection?". There are no elements to be retrieved, so the answer is [zero].

jhwurmbach wrote:

Peter Nortons "Inside the IBM PC" (dated 1983)

Mark Salsbery
Microsoft MVP - Visual C++

prashantjain wrote:

how to read data from hard disk using int86() function??

CxImage  image;
// bmp -> jpg
image.Load("image.bmp", CXIMAGE_FORMAT_BMP);
if (image.IsValid()){
    if(!image.IsGrayScale()) image.IncreaseBpp(24);
    image.SetJpegQuality(99);
    image.Save("image.jpg",CXIMAGE_FORMAT_JPG);
}