Answer to Question #213180 in C++ for Hemambar

Question

Define a class Student with data members as rollno and name. Derive a class Fees from student

that has a data member fees and functions to submit fees and generate receipt. Derive another class

Result from Student that displays the marks and grade obtained by the student. Write a program that

extends the class Result so that the final result of the Student is evaluated based on the marks obtained

in tests, activities and sports.

Answer 1

#include <iostream>
#include <map>
#include <string.h>
#include <string>
#include <vector>
using namespace std;
//Implement class Student
class Student
{
private:
	int rollno;//member rollno
	string name;//name 
public:
	//default constructor
	Student()
	{
		this->name = "";//emprty name
		this->rollno = 0;
	}
	//Parametr constructor
	Student(int _rol, string _name)
	{
		this->name = _name;
		this->rollno = _rol;
	}
	//Getter and setter
	void setName(const string nm)
	{
		this->name = nm;
	}
	void setRoll(int rol)
	{
		this->rollno = rol;
	}
	string getName()const
	{
		return this->name;
	}
	int getRoll()const
	{
		return this->rollno;
	}


};
//direve class Fees from Student
class Fees :public Student
{
private:
	double pr;//fees date $
public:
	//constructor
	Fees(double pay,string name_stud):Student(0,name_stud)
	{
		this->pr = 0.0;
	}
	//submit and generate receipt
	string submit()
	{
		//generate receipt
		string ans = "########################\n";
		ans += "           PAY " + std::to_string(this->pr) + "\n";
		return ans;
	}
};
//direve class Result
class Result :public Student
{
private:
	//the marks test
	vector<int>testMark;
	int marKAct;//mark activities
	int sportMark;//mark sport
public:
	//constructor
	Result(string name_Stud, int roll) :
		Student(roll, name_Stud)
	{


	}
	void InputDate()
	{
		cout << "Enter count test: ";
		int cnt;
		cin >> cnt;
		cout << "Please mark of  tests:\n";
		for (int i = 0; i < cnt; i++)
		{
			int mrk;
			cin >> mrk;
			this->testMark.push_back(mrk);
		}
		cout << "Please enter activities mark: ";
		cin >> this->marKAct;
		cout << "Please enter mark sport: ";
		cin >> this->sportMark;
	}
	//calc average tests ,activities and sport marks
	double resultExec()
	{
		double sum = 0.0;
		for (int i = 0; i < this->testMark.size(); i++)
		{
			sum += static_cast<double>(testMark[i]);
		}
		sum += this->sportMark * 1.0;
		sum += this->marKAct * 1.0;
		sum /= (this->testMark.size() * 1.0 + 2 * 1.0);
		return sum;
	}
};
int main()
{
	vector<Result>st;
	cout << "Enter count student: ";
	int cnS;
	cin >> cnS;
	for (int i = 0; i < cnS; i++)
	{
		int rl;
		string nm;
		cout << "Please enter rollno and name Student:\n";
		cin >> rl;
		cin >> nm;
		Result rs(nm,rl);
		st.push_back(rs);
	}
	//enter marks
	for (int i = 0; i < st.size(); i++)
	{
		cout << "Please full date from Student " << st[i].getName() << endl;
		st[i].InputDate();
	}
	for (int i = 0; i < st.size(); i++)
	{
		cout << st[i].getName() << "  Common result: " << st[i].resultExec() << endl;
	}
	return 0;
}