/in/foo.cc: In function 'int FindMax(int, int*)':
/in/foo.cc:16:9: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return j;
         ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:28:21: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   cout<<FindMax(n,a);
                     ^