C / C++ / MFC

ashish8patil wrote:

SetFilePointer

#include <Windows.h>

struct Student 
{
int Marks;
int RollNo;
};
struct Student sobj;
int main()
{
   HANDLE hFile = CreateFile("a.a", GENERIC_READ|GENERIC_WRITE, 0, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
   for(int i=0;i<10;i++)
   {
      sobj.Marks=10*i;
      sobj.RollNo=i;
      DWORD written;
      WriteFile ( hFile , &sobj , sizeof ( sobj ) , &written, 0);
   }

   int i = 3;
   sobj.Marks=5*i;
   sobj.RollNo=i;
   SetFilePointer(hFile, sizeof(sobj)*i, 0, FILE_BEGIN);
   DWORD written;
   WriteFile ( hFile , &sobj , sizeof ( sobj ) , &written, 0);

   CloseHandle(hFile) ;
}

rahuljin wrote:

void Cserver_side_mfcDlg::OnBnClickedOk2()
{
BYTE m_M1, m_M2, m_M3, m_M4;
DWORD s = 0;
char ss[20] = {0};
UpdateData();
m_ipAdd.GetAddress(m_M1, m_M2, m_M3, m_M4);
sprintf_s(ss, "%s:%s:%s:%s", m_M1, m_M2, m_M3, m_M4);
m_ipList.InsertItem(s++, (LPCTSTR)ss);

}

sprintf_s(ss, "%s:%s:%s:%s", m_M1, m_M2, m_M3, m_M4);

khb wrote:

Therefore I'm still using the Oct. 2001 version. Does the latest SDK really compile for VC6?

Razanust wrote:

It should be
01 hello raza here
02 how are you

int main()
{
  int iLine = 0;
  FILE* pFile = fopen("MyFile.txt", "r");
  if(!pFile) return -1;
  
  printf("%.2d", ++iLine);

  while(true)
  {
    char c = fgetc(pFile);
    if(c==EOF) break;

    printf("%c", c);
    if(c=='\n')
      printf("%.2d", ++iLine);
  }
  return 0;
}