C++/List/list swap

Материал из C\C++ эксперт
Перейти к: навигация, поиск

Swap values between two lists

<source lang="cpp">

  1. include <iostream>

using std::cout; using std::endl;

  1. include <list> // list class-template definition
  2. include <algorithm> // copy algorithm
  3. include <iterator> // ostream_iterator

int main() {

  int array[ 4 ] = { 2, 6, 4, 8 };
  std::list< int > values;      // create list of ints
  std::list< int > otherValues; // create list of ints
  std::ostream_iterator< int > output( cout, " " );
  // insert items in values
  values.push_front( 1 );
  values.push_front( 3 );
  values.push_back( 4 );
  values.push_back( 2 );
  cout << "values contains: ";
  std::copy( values.begin(), values.end(), output );
  otherValues.insert( otherValues.begin(), array, array + 4 );
  cout << "\n\notherValues contains: ";
  std::copy( otherValues.begin(), otherValues.end(), output );
  values.swap( otherValues );
  cout << "\n\nvalues contains: ";
  std::copy( values.begin(), values.end(), output );
  cout << "\n\notherValues contains: ";
  std::copy( otherValues.begin(), otherValues.end(), output );
  cout << endl;
  return 0;

}

/* 

values contains: 3 1 4 2 otherValues contains: 2 6 4 8 values contains: 2 6 4 8 otherValues contains: 3 1 4 2

*/       
 </source>