Example

 int  main()  {
         int  A1[ ]  =  {3,1,4,1,4,5,9,3};
         int  A2[ ]  =  {3,1,4,1,5,0,8,2};
         const  int  N1  =  8;
         const  int  N2  =  8;
         if (lexicographical_compare(
                   A1,  A1  +  N1,  A2,  A2  +  N2))
                 cout  <<  "A1  <  A2" << endl;
         else
                 cout  <<  "A1  >=  A2" << endl;
 }