Comparing 2 internal tables

hi everyone,

i have a query,

i have 2 internal tables

data: begin of itab,

             col1 type i,

            col2  type i,

       end of itab,

       begin of  itab1,

       col1 type i,

       col2  type i,

     end of itab1.

now i have values in both fields of the internal table . now i want to compare itab-col1 = itab1-col1 and  itab-col2 = itab1-col2.

and if the  values of each record is equal then +1 nd if not equal then -1.

can anyone tel me how to do this.