When declaring variables, which method is the most correct?

i.
    for (int j=0;j<1000;j++)
      for (int i=0;i<1000;i++) {
  int k = i*j;
  cout << k << endl;
  }

ii.
    int j,i,k;
    for (j=0;j<1000;j++)
      for (i=0;i<1000;i++) {
         k = i*j;
         cout << k << endl;
         }

Please can you give me any points for either method, for or against.
Much obliged! J.
--
.........................................................
C. Jeremy Pye
NonLinear Image Processing Group    Tel: +44 (603) 593220
School Of Information Systems       Fax: +44 (603) 507720
UEA, Norwich NR4 7TJ, UK  Email: cjp@sys.uea.ac.uk