Answer to Question #321308 in C++ for nickname

Question

Write a program with three functions that calculates the final purchase price after various promotions and sales tax are applied. All functions will use Pass by Reference to manipulate the total purchase price. The functions are described below:

 

Function #1 = Take 20% off the price

Function #2 = Take an addition $10 off ONLY if the current total is at least $50 (after function #1)

Function #3 = Apply 7% sales tax to the total after function #2

 

Output:

Enter the total price of your purchases:   [user types: 100]

The final price of your purchase including all promotions and tax is: $74.90

Answer 1

#include <iostream>
#include <string>
using namespace std;

float price;

void function_1(){
	price = price - 0.2*price;
}
void function_2(){
	if (price > 50)
	   price = price - 0.1*price;
}
void function_3(){
	price = price + 0.07*price;
}

int main(){
	cout << "Enter the total price of your purchases: ";
	cin >> price;
	function_1();
	cout << "The price of your purchase including  - 20%: " << price << endl;
	function_2();
	cout << "The price of your purchase including  - 10% (after -20%): " << price << endl;
	function_3();
	cout << "The final price of your purchase including all promotions and tax is: " << price << endl;

	return 0;
}