# include <stdio.h>

int main ( )
{
  int d;
  int m;
  int y;

  printf ( "Enter date as m/d/y: " );
//
//  Notice that I include the slashes in the input format!
//
  scanf ( "%i/%i/%i", &m, &d, &y );
//
//  We really ought to make sure that M and D are legal!
//

//
//  If D/M is the last day of the year, we've got big changes!
//
  if ( d == 31 && m == 12 )
  {
    d = 1;
    m = 1;
    y = y + 1;
  }
//
//  Otherwise, if D is the last day of M, we've got medium changes!
//  I could have jammed the following three IF statements into one,
//  but it would be impossible to read.
//
//  This check assumes we are NOT in a leap year!
//
  else if ( d == 28 && m == 2 )
  {
    d = 1;
    m = m + 1;
  }
  else if ( d == 30 && ( m == 4 || m == 6 || m == 9 || m == 11 ) )
  {
    d = 1;
    m = m + 1;
  }
  else if ( d == 31 && ( m == 1 || m == 3 || m == 5 || m == 7 || m == 8 || m == 10 ) )
  {
    d = 1;
    m = m + 1;
  }
//
//  Otherwise, it's easy!
//
  else
  {
    d = d + 1;
  }
  printf ( "Next day is %i/%i/%i\n", m, d, y );


  return 0;
}