PSEUDOCODE

Pseudocode is a compact and informal high-level description of a computer programming algorithm that uses the structural conventions of programming languages, but omits detailed subroutines, variable declarations or language-specific syntax. The programming language is augmented with natural language descriptions of the details, where convenient.

Pseudocode resembles, but should not be confused with, skeleton programs including dummy code, which can be compiled without errors. Flowcharts can be thought of as a graphical form of pseudocode.

             Structured English borrows heavily from structured programming.  It uses logical construction and imperative sentences designed to carry out instructions for the action. Decisions are made through IF-THEN-ELLSE-ENDIF and DO-ENDDO procedures.

Structure English is used for the above said discount policy problem and is written as below:

START

Add up the number of copies per book title

IF customer is Book-store keeper

   THEN

      IF the order is > = 6

        THEN

             Discount=25%

         ELSE

             Discount = NIL

         ENDIF

ELSE

IF Customer is either librarian or individual      

   THEN

       IF the order is > = 50

           THEN

                    Discount = 15%

        ELSE

            IF the order is > = 20 and < 50

          THEN

                Discount = 10%

           ELSE

                   IF the order is >=6 and <20

                   THEN

                              Discount = 5%

                    ELSE

                              Discount = Nil

                    ENDIF

           ENDIF

       ENDIF

   ENDIF

ENDIF

STOP