Question

Write the definition of a class, Swimming Pool, to implement its properties and methods. Your class should have the instance variables to store: length (in meters), width (in meters), depth (in meters), rate (in liters per minute) at which the water is filling the pool, and rate (in liters per minute) at which the water is draining from the pool. This class’s functions are expected to do the following: determine the amount of water needed to fill an empty or partially filled pool; The time needed to completely or partially fill the pool or empty the pool; add water or drain for a specific amount of time. Include also a Test class, to test the functionalities of the implemented classes.

Answer 1

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Program Plan: • Create the class swimming Pool. o Declare the instance variables. o Define the default constructor. o Define the parameterized constructor. o Define the function water_needed_to_fill that determines the amount of water need to fill the pool. o Define the function time_to_fill that determines the time needed to fill the pool. o Define the function time_to_empty that determined the time needed to empty the pool. o Define the function add_for_specific_time that adds the water for specific time. o Define the function drain_for_specific_time that drains the water for specific time. (Note: The amount of water initially present in the pool is calculated as the rate at which water is adding in the poll multiplied by the amount of water added for specific time. If specific time is zero, the amount of water in the pool will be zero or pool will be empty.)

Program: ******************* *This C++ program defines the class swimming Pool according* *to the question. * *** #include "stdafx.h" #include using namespace std; //Define the class swimming Pool class swimming Pool { //Declare the instance variables private: double length; double width; double depth; double rate_fill; double rate_drain; public: // Default constructor. swimming Pool()

length = 0.0; width = 0.0; depth = 0.0; rate_fill = 0.0; rate_drain = 0.0; //Parameterized constructor. swimming Pool(double length1, double width1, double depth1, double rate_fill1, double rate_drain1) an length = length1; width = width1; depth = depth1; rate_fill = rate_fill1; rate_drain = rate_drain1; // Define the function water_needed_to_fill that //determines the remaining amount of water needed to //fill the pool.

void water_needed_to_fill(double time) double amount; //Calculate the capacity of pool double capacity = length*width*depth*7.48052; cout << "Total capacity of the pool is: << capacity<<"\n"; //Call the function add_for_specific_time. amount = add_for_specific_time(time); //Display the initially amount of water in the // pool( "filling the pool for specific time")/ cout <<"Initially water present in the pool is: //Display the amount of needed to fill the //pool. if (capacity < amount) cout << "\n Tank is already full"; else

cout << "\nAmount of water needed to"

<<" fill the remaining pool: "; cout << capacity - amount << "gallons" ; // Define the function time_to_fill that //determines the time needed to //fill the pool. void time_to_fill(double time) double amount; //For initially filled pool. amount = add_for_specific_time(time); double capacity = length*width* depth*7.48052; if (amount > capacity) cout << "Time required to fill the pool" << "is: 0 minutes"; else

double remain = capacity - amount; cout <<"Time required to fill the pool is: "; cout << remain / rate_fill << "minutes"; //Define the function time_to_empty that //determines the time needed to l/empty the pool. void time_to_empty() double amount = length*width*depth"7.48052; cout <<"Time required to empty the pool is: "; cout << amount / rate_drain << "minutes"; //Define the function add_for_specific_time //that adds the water for specific time. double add_for_specific_time(double time) return rate_fill time; //Define the function drain_for_specific_time

l/that drains the water for specific time. double drain_for_specific_time() double time; cout << "Enter the time for which is" <<" draining from the pool: "; cin >> time; return rate_drain-time; //Define the main function int main() //Declare the local variables. int choice; double time_fill; double length, width, depth, rate_fill, rate_drain; l/Prompt the user to enter the dimensions of the //pool.

cout << "Enter the length of the pool (in feet): "; cin >> length; cout<<"Enter the width of the pool (in feet): "; cin >> width; cout <<"Enter the depth of the pool (in feet): "; cin >> depth; //Prompt the user to enter the rate at which // water is filling in the tank. cout <<"Enter the rate at which water" <<" is filling: "; cin >> rate_fill; //Prompt the user to enter the rate at which // water is draining from the pool. cout << "Enter the rate at which water" <<" is draining: "; cin >> rate_drain; //Prompt the user to enter the time for which Ilwater is adding in the pool. cout <<"Enter the time for which water is adding" <<" in the pool(Initially): ";

cin >> time_fill;

//Create the object of class swimming Pool swimming Pool sp(length, width, depth, rate_fill, rate_drain); //Call the function water_needed_to_fill. sp.water_needed_to_fill(time_fill); cout << endl; //Call the function time_to_fill. sp.time_to_fill(time_fill); cout << endl; //Call the function time_to_empty. sp.time_to_empty(); cout << endl; system("pause"); return 0;

Sample Output: Enter the length of the pool (in feet): 10 Enter the width of the pool (in feet): 20 Enter the depth of the pool (in feet): 30 Enter the rate at which water is filling: 3 Enter the rate at which water is draining: 2 Enter the time for which water is adding in the pool(Initially): 23 Total capacity of the pool is: 44883.1 Initially water present in the pool is: 69 gallons Amount of water needed to fill the remaining pool: 44814.1 gallons Time required to fill the pool is: 14938 minutes Time required to empty the pool is: 22441.6 minutes Press any key to continue...