/**********************************************************

              This program a( ) edits 

         the original input text file  [A.txt] .

         It exchanges  the original word OW[ ] 

          with the new word NW[ ] in the text. 

               The output file is [B.txt] .

         It also needs the input data file [D.txt]

     which gives the values of NOW,NNW,OW[ ] and NW[ ].

***********************************************************

            [D.txt] [A.txt] a( ) --> [B.txt]

************* the input data file [D.txt] ******************

                 NOW =16
                 NNW =25
      Original Word  =a*x**2 + b*x + c
           New Word  =a*x**3 + b*x**2 + c*x + d

************************************************************



************** Original Text [A.txt] ************************


*****************************************************

Obtain the solution of the following equation.

        f(x)= a*x**2 + b*x + c = 0

*****************************************************


************** Modified Text  ************************


*****************************************************

Obtain the solution of the following equation.

        f(x)= a*x**3 + b*x**2 + c*x + d = 0

*****************************************************