View Compilation Error

0_0_34733208_28734.cpp: In function 'int main()':
0_0_34733208_28734.cpp:8:13: error: 'cin' was not declared in this scope
     while ( cin >> col,col ){
             ^
0_0_34733208_28734.cpp:20:24: error: 'cout' was not declared in this scope
                        cout << words[i][j]; 
                        ^
0_0_34733208_28734.cpp:23:12: error: 'cout' was not declared in this scope
            cout << endl;
            ^
0_0_34733208_28734.cpp:23:20: error: 'endl' was not declared in this scope
            cout << endl;
                    ^