View Compilation Error

0_0_25771448_4552.cpp: In function 'int main()':
0_0_25771448_4552.cpp:5:5: error: 'cin' was not declared in this scope
     cin>>a>>b;
     ^
0_0_25771448_4552.cpp:6:5: error: 'cout' was not declared in this scope
     cout<<a+b;
     ^