VC版本的声明

#include <iostream>
#include <deque>
#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
#endif
int main()
{
deque<int> myDeque(10,1);
int x=0;
deque<int>::iterator iter;
for(iter=myDeque.begin(); iter!=myDeque.end();iter++)
{ cout<<"Element "<<x++<<":"<<*iter<<endl;}
return 1;
}