foo.cpp:1:1: error: 'include' does not name a type
 include<iostream>
 ^
foo.cpp: In function 'int main()':
foo.cpp:8:1: error: 'cin' was not declared in this scope
 cin>>A[i];
 ^
foo.cpp:9:1: error: 'cin' was not declared in this scope
 cin>>a;
 ^
foo.cpp:15:1: error: 'cout' was not declared in this scope
 cout<<b;
 ^