Program in C to show the usage of constants

#include <stdio.h>

#include <conio.h>

/*constants for bonus rates and sales*/

#define BONUSRATE1 0.1

#define BONUSRATE2 0.15

#define BONUSRATE3 0.2

#define SALES1 2000

#define SALES2 5000

#define SALES3 10000

int main()

{

            int sales;

            double commission;

            /*get employees sales*/

            printf("Please enter your total sales to the nearest dollar.\n");

            scanf("%d", &sales);

            /*calculate employees bonus based on info*/

            if(sales <=2000)

            {

                        commission = sales * BONUSRATE1;

                        printf("%g\n" , commission);

            }

            else if(sales > 2000 && sales <=5000)

            {

                        commission = sales * BONUSRATE2;

                        printf("%g\n" , commission);

            }

            else

            {

                        commission = sales * BONUSRATE3;

                        printf("%g\n" , commission);

            }

            return 0;

}