CashRegister

CashRegister.Cpp

#include <iostream>
#include <string>

using namespace std;

class  CashRegister {

	// used only one item
	void checkout(int cash){
		
	}
	
	// first parament is the quantity, second is price
	void checkout(vector<int> numberOfItems, vector<int> listOfItems){
		
	}	


}

CashRegister2.Cpp

//第二版，我还没run，你run一下
#include <iostream>
#include <string>
#include <vector> 

using namespace std;

class  CashRegister {

	// used only one item
	public : 
		int checkout(int cash){
		return cash; 
	}
	
	// first parament is a list of quantities, second is a list of prices
	// assume the lenght of numberOfItems and listOfItems are equal.
	public : 
		int checkout(vector<int> numberOfItems, vector<int> listOfItems){
		
		int total = numberOfItems.size(); //
		cout << "total : " << total; 
		
		int ans = 0;
		
		for (int i = 0 ; i < total ; ++i){
			ans = ans+ numberOfItems[i]*listOfItems[i];
		}
		
		return ans ;
	}	


};



//Testing your method here
int main() { 
  
    // Declare an object of class Cash Registers 
    CashRegister obj1; 
  
    // testing checkout one item 
    int ans1 = obj1.checkout(5);
    cout << "should be 5 " << ans1; 
    
    // testing checkout list of items
    vector<int> customerItems;
    customerItems.push_back(1);
    customerItems.push_back(2);
    
	vector<int> ItemsPrice;
	ItemsPrice.push_back(100);
	ItemsPrice.push_back(200);
  
	int ans2 = obj1.checkout(customerItems, ItemsPrice);
	cout << "should be 500 " << ans2; 
    return 0; 
}