Question

C++

13.2 Lab13 - using if-else if to calculate sales tax and shipping costs

The Concept

Real world problems often involve complex logical conditions. Today we learned two techniques to deal with complexity – the else if construct and logical operators. Use these new tools to below (really you only need one of these tools).

The Exercise

Write a program to determine the shipping costs for an online purchase.

1. Prompt the user for the number of items using the following prompt:
   Enter the number of items:

2. Prompt the user for the purchase price of using the following prompt:
   Enter the purchase price: $

3. Calculate the sales tax as 8.25% of the purchase price

4. Calculate the shipping costs as a flat rate using the following information:

   Number of items	Shipping cost
   1-6	$8.00
   7-12	$4.50
   more than 12	$1.00

5. Calculate the total cost as the sum of the purchase price, sales tax and shipping cost

6. Output the sales tax and shipping costs using the following example:
   Purchase price: $##.##
   Sales tax: $##.##
   Shipping cost: $##.##
   Total cost: $##.##

Note: To format the output for 2 decimals use the following include statement:
#include
and prior to the output statements include the following statement:
cout << fixed << setprecision(2);

Examples:

Enter the number of items: 21
Enter the purchase price: $49.99
Purchase price: $49.99
Sales tax: $4.12
Shipping cost: $1.00
Total cost: $55.11

Enter the number of items: 10
Enter the purchase price: $35.00
Purchase price: $35.00
Sales tax: $2.89
Shipping cost: $4.50
Total cost: $42.39

Answer 1

#include
#include

using namespace std;

int main()
{
int n;
cout<<"Enter the number of items: ";
cin>>n;
float purchase_price;
cout<<"Enter the purchase price: $";
cin>>purchase_price;
float sales_tax = (825*purchase_price)/10000;
  
float shipping_price;
  
if(n>=1 && n<=6)
shipping_price = 8.00;
else if(n>=7 && n<=12)
shipping_price = 4.50;
else if(n>12)
shipping_price = 1.00;
  
float total_price = purchase_price + sales_tax + shipping_price;
  
cout<<"Purchase price: $"< cout<<"Sales tax: $"< cout<<"Shipping cost: $"< cout<<"Total cost: $"<

return 0;
}

Output: