vector::swap
Exchanges the elements of two vectors.
void swap(
vector<Type, Allocator>& _Right
);
friend void swap(
vector<Type, Allocator >& _Left,
vector<Type, Allocator >& _Right
);
Parameters
_Right
A vector providing the elements to be swapped, or a vector whose elements are to be exchanged with those of the vector _Left._Left
A vector whose elements are to be exchanged with those of the vector _Right.
Example
// vector_swap.cpp
// compile with: /EHsc
#include <vector>
#include <iostream>
int main( )
{
using namespace std;
vector <int> v1, v2;
v1.push_back( 1 );
v1.push_back( 2 );
v1.push_back( 3 );
v2.push_back( 10 );
v2.push_back( 20 );
cout << "The number of elements in v1 = " << v1.size( ) << endl;
cout << "The number of elements in v2 = " << v2.size( ) << endl;
cout << endl;
v1.swap( v2 );
cout << "The number of elements in v1 = " << v1.size( ) << endl;
cout << "The number of elements in v2 = " << v2.size( ) << endl;
}
The number of elements in v1 = 3 The number of elements in v2 = 2 The number of elements in v1 = 2 The number of elements in v2 = 3
Requirements
Header: <vector>
Namespace: std