View Compilation Error

0_0_31872974_27760.cpp: In function 'int main()':
0_0_31872974_27760.cpp:25:2: error: 'cin' was not declared in this scope
  cin>>times;
  ^
0_0_31872974_27760.cpp:47:4: error: 'cout' was not declared in this scope
    cout<<milk[0].brand<<endl;//输出牌子 
    ^
0_0_31872974_27760.cpp:47:25: error: 'endl' was not declared in this scope
    cout<<milk[0].brand<<endl;//输出牌子 
                         ^