Less-than implementation

 template  <typename  T>
 struct  less  {
     bool  operator()(const  T  &a,
                         const  T  &b)  {
             return  (a  <  b);
     }
 };
 less<int>  comp;
 int  a,  b;
 if  (comp(a,  b))
         cout  <<  a  <<  "<"  <<  b  <<  endl;