View Compilation Error

0_0_18805841_10488.cpp: In function 'int main()':
0_0_18805841_10488.cpp:5:9: error: 'cin' was not declared in this scope
  while (cin>>chose)
         ^
0_0_18805841_10488.cpp:15:4: error: 'cout' was not declared in this scope
    cout << "Case 1:" << endl;
    ^
0_0_18805841_10488.cpp:15:25: error: 'endl' was not declared in this scope
    cout << "Case 1:" << endl;
                         ^