added solution for Hotel and prices | hackerrank |c++

HackerRank/Classes and objects/classes and objects.cpp

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+/**
+ * @file Box It!.cpp
+ * @author Vipul Kumar Singh
+ * @brief  (https://www.hackerrank.com/challenges/classes-objects/problem)
+ * @version 0.1
+ * @date 2021-10-02
+ * 
+ * @copyright Copyright (c) 2021
+ * 
+ */
+
+#include <cmath>
+#include <cstdio>
+#include <vector>
+#include <iostream>
+#include <algorithm>
+#include <cassert>
+using namespace std;
+
+// Write your Student class here
+class Student 
+{
+    private :
+    int scores[5], sum = 0;
+
+    public :
+    void input()
+    {
+        for (int i = 0; i < 5; i++)
+        {
+            cin>>scores[i];
+        }
+    }
+    int  calculateTotalScore()
+    {
+        for (int j = 0; j<5 ; j++)
+        {
+            sum = sum + scores[j];
+        }
+        return sum;
+    }
+};
+
+int main() {
+    int n; // number of students
+    cin >> n;
+    Student *s = new Student[n]; // an array of n students
+
+    for(int i = 0; i < n; i++){
+        s[i].input();
+    }
+
+    // calculate kristen's score
+    int kristen_score = s[0].calculateTotalScore();
+
+    // determine how many students scored higher than kristen
+    int count = 0; 
+    for(int i = 1; i < n; i++){
+        int total = s[i].calculateTotalScore();
+        if(total > kristen_score){
+            count++;
+        }
+    }
+
+    // print result
+    cout << count;
+
+    return 0;
+}

HackerRank/Hotel Prices/Hotel Prices.cpp

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+/**
+ * @file "Hotel Prices.cpp"
+ * @author Vipul Kumar Singh 
+ * @brief  (https://www.hackerrank.com/challenges/hotel-prices/problem)
+ * @version 0.1
+ * @date 2021-10-02
+ * 
+ * @copyright Copyright (c) 2021
+ * 
+ */
+
+#include <iostream> // header files 
+#include <vector>
+
+using namespace std;
+
+class HotelRoom {
+
+    private: 
+    /* 
+     access specifier : private 
+     it means that the variables declared in this access specifier private cannot be accessed 
+     by the other class data members and functions
+
+    */ 
+    int bedrooms_; // for the no. of bedrooms in class hotelroom
+    int bathrooms_; // for the no. of bathrooms in class hotelroom
+
+
+   public:
+    HotelRoom(int bedrooms, int bathrooms)  // parameterized constructor for the assign some values to the variables 
+    {
+        bedrooms_ = (bedrooms); 
+        bathrooms_ = (bathrooms) ;
+
+    }
+
+    int get_price() // the function is used to calculate the price of the hotel 
+    {
+       int room_price = 50*bedrooms_ + 100*bathrooms_ ;
+
+       return room_price;
+    }
+
+};
+
+
+/*
+Creating new class called Hotel Apartment which inheriting from the base class HotelRoom  
+*/
+class HotelApartment : public HotelRoom {
+public:
+    HotelApartment(int bedrooms, int bathrooms) : HotelRoom(bedrooms + 2, bathrooms) {}
+
+    int get_price() 
+    {
+        int hotel_price =  ( HotelRoom::get_price()); // using the base class function called get_price() and storing them in hotel_price variable  
+        return hotel_price ;
+    }
+};
+
+int main() {
+    int n;
+    cin >> n;
+    vector<HotelRoom*> rooms;
+    for (int i = 0; i < n; ++i) 
+    {
+        string room_type;
+        int bedrooms;
+        int bathrooms;
+
+        cin >> room_type >> bedrooms >> bathrooms;
+
+        if (room_type == "standard") 
+        {
+            rooms.push_back(new HotelRoom(bedrooms, bathrooms)); 
+            /*
+             dynamic memory allocation using new to create new object of HotelRoom class and
+             also call the parameterized constructor and 
+             the data is stored in vector rooms 
+            */
+        } 
+
+        else 
+        {
+            rooms.push_back(new HotelApartment(bedrooms, bathrooms));
+             /*
+             dynamic memory allocation using new to create new object of HotelApartment class and
+             also call the parameterized constructor and 
+             the data is stored in vector rooms 
+            */
+        }
+    }
+
+    int total_profit = 0;
+
+    for (auto room : rooms) 
+    {
+        total_profit += room->get_price();
+    }
+
+    cout << total_profit << endl;
+
+    //deletion of objects that created by new operator for optimum performance 
+
+    for (auto room : rooms) 
+    {
+        delete room;
+    }
+
+    rooms.clear(); // eraseing the data from vector and size became 0 
+
+    return 0;
+}