View Compilation Error

0_0_36718551_22606.cpp: In function 'int main()':
0_0_36718551_22606.cpp:6:5: error: 'cin' was not declared in this scope
     cin >> a >> b;
     ^
0_0_36718551_22606.cpp:7:5: error: 'cout' was not declared in this scope
     cout << a+b << endl;
     ^
0_0_36718551_22606.cpp:7:20: error: 'endl' was not declared in this scope
     cout << a+b << endl;
                    ^