View Compilation Error

0_0_38894825_28830.cpp: In function 'int main()':
0_0_38894825_28830.cpp:4:12: error: 'cin' was not declared in this scope
    4 |     while (cin>>a>>b == 2) {
      |            ^~~
0_0_38894825_28830.cpp:6:9: error: 'cout' was not declared in this scope
    6 |         cout<< result;
      |         ^~~~