/in/foo.cc: In function 'int main()':
/in/foo.cc:22:9: error: 'a' was not declared in this scope
    cin>>a[i];
         ^
/in/foo.cc:25:9: error: 'a' was not declared in this scope
  Output(a,n);Output(b,m);
         ^
/in/foo.cc:17:10: warning: unused variable 's' [-Wunused-variable]
  int i,n,s[10000];
          ^