Someone Please Check My Code

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could please tell me coding errors in code? have downloaded code newly purchased dmd freetronics , don't know how program dmd's.

 
code: [select]
switch(hour)
  {
  case 1:
    dmd.drawstring( 1,8, "01", 2, graphics_normal );
    break;
  case 2:
    dmd.drawstring( 1,8, "02", 2, graphics_normal );
    break;
  case 3:
    dmd.drawstring( 1,8, "03", 2, graphics_normal );
    break;
  case 4:
    dmd.drawstring( 1,8, "04", 2, graphics_normal );
    break;
  case 5:
    dmd.drawstring( 1,8, "05", 2, graphics_normal );
    break;
  case 6:
    dmd.drawstring( 1,8, "06", 2, graphics_normal );
    break;
  case 7:
    dmd.drawstring( 1,8, "07", 2, graphics_normal );
    break;
  case 8:
    dmd.drawstring( 1,8, "08", 2, graphics_normal );
    break;
  case 9:
    dmd.drawstring( 1,8, "09", 2, graphics_normal );
    break;
  case 10:
    dmd.drawstring( 1,8, "10", 2, graphics_normal );
    break;
  case 11:
    dmd.drawstring( 1,8, "11", 2, graphics_normal );
    break;
  case 12:
    dmd.drawstring( 1,8, "12", 2, graphics_normal );
    break;
  case 13:
    dmd.drawstring( 1,8, "13", 2, graphics_normal );
    break;
  case 14:
    dmd.drawstring( 1,8, "14", 2, graphics_normal );
    break;
  case 15:
    dmd.drawstring( 1,8, "15", 2, graphics_normal );
    break;
  case 16:
    dmd.drawstring( 1,8, "16", 2, graphics_normal );
    break;
  case 17:
    dmd.drawstring( 1,8, "17", 2, graphics_normal );
    break;
  case 18:
    dmd.drawstring( 1,8, "18", 2, graphics_normal );
    break;
  case 19:
    dmd.drawstring( 1,8, "19", 2, graphics_normal );
    break;
  case 20:
    dmd.drawstring( 1,8, "20", 2, graphics_normal );
    break;
  case 21:
    dmd.drawstring( 1,8, "21", 2, graphics_normal );
    break;
  case 22:
    dmd.drawstring( 1,8, "22", 2, graphics_normal );
    break;
  case 23:
    dmd.drawstring( 1,8, "23", 2, graphics_normal );
    break;
  case 24:
    dmd.drawstring( 1,8, "24", 2, graphics_normal );
    break;

seems me long-winded way of writing
code: [select]
   
char buffer [3];
sprintf (buffer, "%02d", hour);   
dmd.drawstring( 1,8, buffer, 2, graphics_normal );


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