STL_Algorithm3: remove, remove_if, remove_copy, remove_copy_if

 

// Remove.cpp : Defines the entry point for the console application.

//

 

#include <iostream>

#include <algorithm>

#include <vector>

#include <iterator>

 

using std::cout;

using std::endl;

 

bool greater9( int );

 

int main()

{

    const int SIZE = 10;

    int a[SIZE] = { 10, 2, 10, 4, 16, 6, 14, 8, 12, 10 };

 

    std::ostream_iterator< int > outputIt( cout, " " );

 

    std::vector< int > v( a, a + SIZE );

    std::vector< int >::iterator newLastElement;

 

    cout<<"Vector v before removing all 10s: /n  ";

    std::copy( v.begin(), v.end(), outputIt );

 

    newLastElement = std::remove( v.begin(), v.end(), 10 );

 

    cout<<"/nVector v after removing all 10s: /n  ";

    std::copy( v.begin(), v.end(), outputIt );

 

    std::vector< int > v2( a, a + SIZE );

    std::vector< int > c( SIZE, 0 );

 

    cout<<"/n/nVector v2 before removing all 10s and copying:/n";

    std::copy( v2.begin(), v2.end(), outputIt );

 

    std::remove_copy( v2.begin(), v2.end(), c.begin(), 10 );

 

    cout<<"/nVector c after remvoing all 10s from v2:/n ";

    std::copy( c.begin(), c.end(), outputIt );

 

    std::vector< int > v3( a, a + SIZE );

 

    cout<<"/n/nVector v3 before removing all elements"

        <<"/nfreater than 9:/n";

    std::copy( v3.begin(), v3.end(), outputIt );

 

    newLastElement = std::remove_if( v3.begin(), v3.end(), greater9 );

 

    cout<<"/nVector v3 after removing all elements"

        <<"/ngreater than 9:/n";

    std::copy( v3.begin(), newLastElement, outputIt );

 

    std::vector< int > v4( a, a + SIZE );

    std::vector< int > c2( SIZE, 0 );

 

    cout<<"/n/nVector v4 before removing all elements"

        << "/ngreater than 9 and copying:/n";

    std::copy( v4.begin(), v4.end(), outputIt );

 

    std::remove_copy_if( v4.begin(), v4.end(), c2.begin(), greater9 );

 

    cout<<"/nVector c2 after removing all elements"

        << "/ngreater than 9 from v4:/n";

    std::copy( c2.begin(), c2.end(), outputIt );

 

    cout<<endl;

 

    return 0;

}

 

bool greater9( int x )

{

    return x > 9;

}