/in/foo.cc: In function 'int main()':
/in/foo.cc:29:37: error: 'pow' was not declared in this scope
   result += result + pow(a[j], j + 1);
                                     ^
/in/foo.cc:7:6: warning: unused variable 'b' [-Wunused-variable]
  int b[32] = { 0 };
      ^