Apply Discount Every n Orders（C++每隔 n 个顾客打折）

雨点打透心脏的1/2处 2023-01-07 02:28 108阅读 0赞

解题思路：

（1）使用map记录商品的id和价格

class Cashier {
    private:
        int count=0,a,b;
        double sum=0; 
        unordered_map<int,int> mp;
    public:
        Cashier(int n, int discount, vector<int>& products, vector<int>& prices) {
            a=n;
            b=discount;
            for(int i=0;i<products.size();i++) {
                mp[products[i]]=prices[i];
            }
        }
        
        double getBill(vector<int> product, vector<int> amount) {
            sum=0;
            count++;
            for(int i=0;i<product.size();i++) {
                sum+=amount[i]*mp[product[i]];
            }
            if(count==a) {
                count=0;
                return sum*(1-(double)b/100);
            } else {
                return sum;
            }
        }
    };
    
    /**
     * Your Cashier object will be instantiated and called as such:
     * Cashier* obj = new Cashier(n, discount, products, prices);
     * double param_1 = obj->getBill(product,amount);
     */