back_insert_iterator用法

#include 
int main()
{
	int a[10]={1,2,3,4,5,6,7,8,9,0,};
	vectord(5,0);
	copy(a,a+10,ostream_iterator(cout," "));
	cout<(cout," "));
	cout< >(d));
    copy(d.begin(),d.end(),ostream_iterator(cout," "));

	cout<