View Compilation Error

0_0_15102228_27382.cpp: In function 'int main()':
0_0_15102228_27382.cpp:6:11: error: 'cin' was not declared in this scope
     while(cin>>n>>m&&(n||m))
           ^
0_0_15102228_27382.cpp:11:13: error: 'cout' was not declared in this scope
             cout<<mul<<endl;
             ^
0_0_15102228_27382.cpp:11:24: error: 'endl' was not declared in this scope
             cout<<mul<<endl;
                        ^