1.vector  
  vector<string> vec_one;
  vector<string> vec_two;
  vec_one.push_back("xiaochun");
  vec_two.push_back("chunxiao");
  vec_two.insert(vec_two.end(),vec_one.begin(),vec_one.end());

 
2.map 
  map<int,string> m_one;
  map<int,string> m_two;
  m_one.insert(make_pair(1,"xiaochun"));
  m_two.insert(make_pair(2,"chunxiao"));
  m_two.insert(m_one.begin(),m_one.end());

  

 

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