deque::push_front
Adds an element to the beginning of the deque.
void push_front(
const Type& _Val
);
Parameters
- _Val
The element added to the beginning of the deque.
Remarks
If an exception is thrown, the deque is left unaltered and the exception is rethrown.
Example
// deque_push_front.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
int main( )
{
using namespace std;
deque <int> c1;
c1.push_front( 1 );
if ( c1.size( ) != 0 )
cout << "First element: " << c1.front( ) << endl;
c1.push_front( 2 );
if ( c1.size( ) != 0 )
cout << "New first element: " << c1.front( ) << endl;
}
Output
First element: 1
New first element: 2
Requirements
Header: <deque>
Namespace: std