Beispiel: Bubblesort

#include <iostream.h>
extern "C" { 
  #include <stdlib.h> // for atoi()
}
const int MAXNUM=10;

void exchange(int *a, int *b)
{  int t=*a;
   *a=*b;
   *b=t;
}

void print_list(int list[], int list_size)
{ for (int j=0; j<list_size; j++)
    cout << "list[" << j << "]=" << list[j] << endl;
  cout << endl;
}

void bubble_sort(int list[], int list_size)
{ int sorted = FALSE;
  while (!sorted)
  {
    sorted = TRUE;
    for (int j=0; j<list_size - 1; j++)
    {
      if (list[j] > list[j+1])
      {
        sorted = FALSE;
        exchange(&list[j], &list[j+1]);
      }
    }
  }
}

main(int argc, char **argv)
{ int a[MAXNUM], i;
  const int size = argc - 1;

  if ((argc-1 < 2) || (argc-1 >MAXNUM))
  { cerr << "Usage: " << argv[0] 
         << " number1 number2 [... number" 
         << MAXNUM <<"]" << endl;
    exit(1);
  }
  i=0;
  while(--argc)
    a[i++] = atoi(*++argv);
  print_list(a, size); //  print unsorted
  bubble_sort(a, size); // sort array
  print_list(a, size);  // print list
}