View Compilation Error

0_0_39395687_734.cpp: In function 'int main()':
0_0_39395687_734.cpp:3:9: error: 'cin' was not declared in this scope
    3 |         cin >> a >> b;
      |         ^~~
0_0_39395687_734.cpp:4:9: error: 'cout' was not declared in this scope
    4 |         cout << a + b << endl;
      |         ^~~~
0_0_39395687_734.cpp:4:26: error: 'endl' was not declared in this scope
    4 |         cout << a + b << endl;
      |                          ^~~~