Pointer to structure variables

Program 56) Write a program to illustrate the use of structure pointers.
A program to illustrate the use of a structure pointer to manipulate the elements of an array of structures. Note that the pointer ptr (of type struct invent) is also used as the loop control index in four loops.

                                 PROGRAM

struct invent
{
        char *name [20] ;
        int number ;
        float price ;
} ;
main (  )
 {
      struct invent product [3], *ptr ;
      printf(" INPUT \n\n) ;
      for (ptr = product  ; ptr < product + 3 ; ptr+)
           scanf ("%s %d %f ", ptr->name, &ptr->number,
                               &ptr->price) ;
     printf ("\nOUTPUT\n\n") ;
      ptr = product ;
     while (ptr < product + 3)
     {
          printf ("%-20s %5d %10.2f\n",
                               ptr->name,
                               ptr->number,
                               ptr->number) ;
         ptr++ ;
    }
 }

Output:                 INPUT
                             Washing_machine    5    7500
                             Electric_iron             12    350
                             Two_in_one               7    1250

                             OUTPUT
                             Washing machine     5    7500.00
                             Elestric_iron             12     350.00
                             Two_in_one               7    1250.00