/*
* A program to calculate tax and total cost.
*/
#include /* printf, scanf definitions */
#define TAX_RATE .05 //constant rate of taxation
int main (void)
{
double cost, tax, total; //spaces for item cost, tax, and total cost
/* get the cost of the item */
printf("Enter cost of item: ");
scanf("%lf", &cost);
/* calculate the tax */
tax = cost * TAX_RATE;
// calculate the total cost
total = cost + tax;
/* display the result */
printf("The tax on your item is $%5.2lf.\n", tax);
printf("The total cost of your purchase is $%5.2lf.\n", total);
return(0);
}