C / C++ / MFC

goldenrose9 wrote:

...then why it is displaying extra characters when i am using ReadFile method.

goldenrose9 wrote:

Is there any problem in my code.

int main()
{
  myFile mObj;
  BYTE* hSrc = new BYTE[27];
  mObj.ReadBytes(hSrc,26);
  hSrc[26] = '\0';
  std::cout<<hSrc;
  return 0;
}

Cedric Moonen wrote:

BYTE* hSrc = new BYTE[27];

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BM:

Thaddeus Jones wrote:

Note that some variation in disk speed can't be prevented in a multitasking OS where other programs might be using the disk too.

Thaddeus Jones wrote:

If your memory permits, you could consider reading the entire input file to memory at once at the beginning of your algorithm and then processing it and writing the results.

Thaddeus Jones wrote:

Maybe you could increase your input buffer then from 512 bytes to say 100Mb, and every time you've processed the 100Mb from memory, you'll read a new 100Mb. Similarly, writing your output to a memory buffer (say also 100Mb) and once your buffer is full writing that to file, should help with speed too.

progDes wrote:

Usually this algorithm finishes in 1 minute and 50 seconds. But I noticed that sometimes (rarely) it finishes in 24 seconds! Processing the same file, the same execution path. I've started to search for the reasons of why this slowdown is happening and how can I control that.

obj->q has buffer[500] to buffer[503] as integer value
obj->w is buffer[504]
obj->s has buffer[508] to buffer[515] as long value

Niklas Lindquist wrote:

Of course that depends on the current padding