VOID POINTER

VOID POINTER

            A void pointer is a special type of pointer that can points to any data type variables.  The general format of a void pointer variable is:

                        Syntax                        :           void *ptrvariable;

                        Example         :           void *ptr;

                                                            int X;

                                                            float Y;

                                                            ptr = &X;

                                                            ptr = &Y;

           

For accessing value of the variable with the pointer variable, type casting must be placed to refer the specific data item.

/* EXAMPLE PROGRAM FOR VOID POINTER */

main()

{

            int x=10;

            double y=3.45678;

            void *ptr;

            clrscr();

            ptr=&x;

            printf("\nValue 1         =%d",*(int *)p);

            ptr=&y;

            printf("\nValue 2         =%lf",*(double *)p);

}