deque::push_front

發行項
03/26/2013

將項目加入至 deque 的開頭。

void push_front(
   const Type& _Val
);
void push_front(
   Type&& _Val
);

參數

參數	描述
_Val	項目會加入至 deque 的開頭。

備註

如果擲回例外狀況， deque 維持不變，而且會重新擲回例外狀況。

範例

// deque_push_front.cpp
// compile with: /EHsc
#include <deque>
#include <iostream>
#include <string>

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;

// move initialize a deque of strings
   deque <string> c2;
   string str("a");

   c2.push_front( move( str ) );
   cout << "Moved first element: " << c2.front( ) << endl;
}