C / C++ / MFC

RajeshHegde8xp wrote:

ny body give me hint how to do that ?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

<br />
#include <iostream><br />
#include <fstream><br />
using namespace std;<br />
<br />
void main() {<br />
	ifstream in("c:/boot.ini");<br />
	in.seekg(0, ios::end);      //set file-stream pos at end<br />
	streampos ps = in.tellg();  //get the pos<br />
	cout << "File size: " << ps << endl;  //file size by "byte"<br />
	in.close();                 //close...<br />
}<br />

<br />
ifstream shapefilef(ShapeFileName.c_str(),ios::binary);<br />
	shapefilef.seekg(0,ios::end);<br />
	streampos ps = shapefilef.tellg();<br />
	int size = ps.seekpos();<br />
	char* data = new char [size];<br />
	shapefilef.seekg(0,ios::beg);<br />
	shapefilef.read(data,size);<br />
	istream shapefile(data);

int fh = _open(file name, _O_APPEND , _S_IREAD | _S_IWRITE );<br />
int filesize = _filelength(fh);

#define  CK_CONTAINING_RECORD( PTR, TYP, FLD ) \
         ( (TYP*)( (byte*)(PTR) - (byte*)(&((TYP*)0)->FLD) ) )
 
class  MyClass {
public:
  long  m_long;
};
 
long     *lp = ...;                                        // you have this
MyClass  *op = CK_CONTAINING_RECORD(lp, MyClass, m_long);  // you want this

cuteee wrote:

You can do if(x==NULL), then print"Error".

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow