vector::emplace_back
Adds an element constructed in place to the end of the vector.
void emplace_back(
Type&&_Val
);
Parameters
Parameter |
Description |
_Val |
The element added to the end of the vector Class. |
Example
// vector_push_back.cpp
// compile with: /EHsc
#include <vector>
#include <iostream>
int main( )
{
using namespace std;
vector <int> v1;
v1.push_back( 1 );
if ( v1.size( ) != 0 )
cout << "Last element: " << v1.back( ) << endl;
v1.push_back( 2 );
if ( v1.size( ) != 0 )
cout << "New last element: " << v1.back( ) << endl;
// initialize a vector of vectors by moving v1
vector < vector <int> > vv1;
vv1.emplace_back( move( v1 ) );
if ( vv1.size( ) != 0 && vv1[0].size( ) != 0 )
cout << "Newer last element: " << vv1[0].back( ) << endl;
}
Last element: 1 New last element: 2 Newer last element: 2
Requirements
Header: <vector>
Namespace: std