copy
copy |
|
Copy a range of items to another area.
Copy the elements from the range
[ first , last
) into a range of the same size starting at result,
using operator= to replace the existing elements.
Return an iterator of the same type as result
positioned immediately after the last new element.
#include <algorithm>
template< class InputIterator, class OutputIterator >
OutputIterator copy
(
InputIterator first,
InputIterator last,
OutputIterator result
);
Time complexity is linear, as (
last - first )
assignments are performed. Space complexity is constant.
#include <iostream>
#include <string.h>
#include <algorithm>
char string[ 23 ] = "A string to be copied.";
void
main()
{
char result[ 23 ];
copy( string, string + 23, result );
cout << " Src: " << string << "\nDest: " << result << "\n";
}
Src: A string to be copied.
Dest: A string to be copied.
#include <iostream>
#include <algorithm>
#include <iterator>
#include <vector>
void
main()
{
vector< int > v( 10 );
for ( size_t i = 0; i < v.size(); ++i )
v[ i ] = i;
ostream_iterator< int > iter( cout, " " );
copy( v.begin(), v.end(), iter );
cout << "\n";
}
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#include <iostream>
#include <algorithm>
#include <iterator>
#include <vector>
void
main()
{
vector<int> v1( 10 );
for ( size_t i = 0; i < v1.size(); ++i )
v1[ i ] = i;
vector< int > v2( 10 );
copy( v1.begin(), v1.end(), v2.begin() );
ostream_iterator< int > iter( cout, " " );
copy( v2.begin(), v2.end(), iter );
cout << "\n";
}
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#include <iostream>
#include <algorithm>
#include <iterator>
#include <vector>
void
main()
{
vector< int > v1( 10 );
for ( size_t loc = 0; loc < v1.size(); ++loc )
v1[ loc ] = loc;
vector< int > v2;
insert_iterator< int_vector > i( v2, v2.begin() );
copy( v1.begin(), v1.end(), i );
ostream_iterator< int > outIter( cout, " " );
copy( v2.begin(), v2.end(), outIter );
cout << "\n";
}
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