./test.cpp:1:1: error: 'include' does not name a type
include<iostream>
^
./test.cpp: In function 'int main()':
./test.cpp:5:5: error: 'cin' was not declared in this scope
cin >> a >> b;
^
./test.cpp:6:5: error: 'cout' was not declared in this scope
cout << a+b;
^