int main()
{
cout << "please enter the numbers:";
int i;
vector<int> ivec;
while(cin >> i)
{
ivec.push_back(i);
}
ostream_iterator<int> output(cout, " "); //关联cout，设置分隔符
copy(ivec.begin(), ivec.end(), output); //元素拷贝到ostream_iterator所指向的对象cout
cout; //显示cout的值
cout << endl;
}
