View Compilation Error

1_867_221_18716.cpp: In function 'int main()':
1_867_221_18716.cpp:11:2: error: 'cin' was not declared in this scope
  cin>>T;
  ^
1_867_221_18716.cpp:16:13: error: 'cout' was not declared in this scope
   if(x%2==0)cout<<"Case "<<i<<": even"<<endl;
             ^
1_867_221_18716.cpp:16:41: error: 'endl' was not declared in this scope
   if(x%2==0)cout<<"Case "<<i<<": even"<<endl;
                                         ^
1_867_221_18716.cpp:17:8: error: 'cout' was not declared in this scope
   else cout<<"Case "<<i<<": odd"<<endl;
        ^
1_867_221_18716.cpp:17:35: error: 'endl' was not declared in this scope
   else cout<<"Case "<<i<<": odd"<<endl;
                                   ^