/in/foo.cc:7:12: error: stray '#' in program
  for(int i=#i1,i<=10;i++)cin>>a[i];
            ^
/in/foo.cc:1:1: error: 'include' does not name a type
 include<iostream.h>
 ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:7:13: error: 'i1' was not declared in this scope
  for(int i=#i1,i<=10;i++)cin>>a[i];
             ^~
/in/foo.cc:7:25: error: expected ';' before ')' token
  for(int i=#i1,i<=10;i++)cin>>a[i];
                         ^
/in/foo.cc:7:26: error: 'cin' was not declared in this scope
  for(int i=#i1,i<=10;i++)cin>>a[i];
                          ^~~
/in/foo.cc:8:2: error: 'cin' was not declared in this scope
  cin>>b;
  ^~~
/in/foo.cc:16:2: error: 'cout' was not declared in this scope
  cout<<c;
  ^~~~
/in/foo.cc:6:10: warning: unused variable 'A' [-Wunused-variable]
  int b,B,A;
          ^