#include <library.h>

void swap_if(int & x, int & y)
{ if (x > y)
  { int temp = x;
    x = y;
    y = temp; } }

void main()
{ int A[1000];
  ifstream fin;
  fin.open("data");
  if (fin.fail())
  { cout << "Can't find file\n";
    exit(1); }

/* Useful update operators, simplify common actions, recommended

   var += x;
      equivalent to
   var = var + x;

   and  -=  *=  /=  %=  &&=  ||=  etc...
*/

/* These update operators are discouraged and not recommended (by me)

   var ++   sort of the same as var += 1
   ++ var   sort of the same as var += 1
   var --   sort of the same as var -= 1
   -- var   sort of the same as var -= 1

   could say
     int x = 5;
     cout << "answer is " << x++ << "\n";
     cout << "answer is " << ++x << "\n";
     cout << "answer is " << y+=1 << "\n";
*/

  int num;
  for (num = 0; num <= 1000; num += 1)
  { fin >> A[num];
    if (fin.fail())
      break; }

  cout << num << " numbers successfully read\n";
  fin.close();

  for (int line = num - 1; line >= 0; line -= 1)
    for (int i = 0; i <= line; i += 1)
      swap_if(A[i], A[i+1]);

  ofstream fout;
  fout.open("data");
  for (int i = 0; i <= num; i += 1)
    fout << A[i] << "\n";
  fout.close(); }