foo.cpp:1:1: error: 'include' does not name a type
 include<iostream>
 ^
foo.cpp:3:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
foo.cpp: In function 'int main()':
foo.cpp:6:1: error: 'cin' was not declared in this scope
 cin>>x; 
 ^
foo.cpp:7:1: error: 'cout' was not declared in this scope
 cout<<x*(x+2); 
 ^