how to write a program of Arithmetic Opretore by give the value of user in C-programing ?

int a;

clrscr();

printf("\n\t Enter the Value of A\t:\t");

scanf("%d",&a);

printf("\n\n\t Value of A is\t:\t%d",a);

printf ("\n\n\t Value of A is\t:\t%d",++a);

printf ("\n\n\t Value of A is\t:\t%d",a++);

printf ("\n\n\t Value of A is\t:\t%d",a);

printf ("\n\n\t Value of A is\t:\t%d",--a);

printf ("\n\n\t Value of A is\t:\t%d",a--);

printf ("\n\n\t Value of A is\t:\t%d",a);

getch();

}