k/B64 OOP

exp1.cpp · 694 B · C++ Raw

1	#include <iostream>
2	using namespace std;
3
4	class Student
5	{
6	private:
7	int roll;
8	string name;
9	float marks;
10
11	public:
12	void getData()
13	{
14	cout << "Enter roll no: ";
15	cin >> roll;
16	cout << "Enter name: ";
17	cin >> name;
18	cout << "Enter marks: ";
19	cin >> marks;
20	}
21
22	void showData()
23	{
24	cout << "\nRoll No: " << roll << endl;
25	cout << "Name: " << name << endl;
26	cout << "Marks: " << marks << endl;
27	if (marks >= 40)
28	cout << "Result: Pass" << endl;
29	else
30	cout << "Result: Fail" << endl;
31	}
32	};
33
34	int main()
35	{
36	Student s;
37	s.getData();
38	s.showData();
39	return 0;
40	}
41

exp10.cpp · 4.0 KiB · C++ Raw

#include <iostream>
using namespace std;

class Consumer
{
protected:
    int id;
    string name;
    int prevReading, currReading;

public:
    void getData()
    {
        cout << "Enter consumer id: ";
        cin >> id;
        cout << "Enter name: ";
        cin >> name;
        cout << "Enter previous reading: ";
        cin >> prevReading;
        cout << "Enter current reading: ";
        cin >> currReading;
        while (currReading < prevReading)
        {
            cout << "Current reading cannot be less than previous. Enter again: ";
            cin >> currReading;
        }
    }

int units()
    {
        return currReading - prevReading;
    }

int getId()
    {
        return id;
    }

virtual float bill() = 0;
    virtual string type() = 0;

void showBill()
    {
        cout << "\n-------- ELECTRICITY BILL --------" << endl;
        cout << "Consumer ID   : " << id << endl;
        cout << "Name          : " << name << endl;
        cout << "Type          : " << type() << endl;
        cout << "Units consumed: " << units() << endl;
        cout << "Bill amount   : Rs. " << bill() << endl;
        cout << "----------------------------------" << endl;
    }

virtual ~Consumer() {}
};

class Domestic : public Consumer
{
public:
    float bill()
    {
        int u = units();
        float amt;
        if (u <= 100)
            amt = u * 3.5;
        else if (u <= 300)
            amt = 100 * 3.5 + (u - 100) * 5.0;
        else
            amt = 100 * 3.5 + 200 * 5.0 + (u - 300) * 7.5;
        return amt + 50;
    }
    string type()
    {
        return "Domestic";
    }
};

class Commercial : public Consumer
{
public:
    float bill()
    {
        int u = units();
        float amt;
        if (u <= 200)
            amt = u * 7.0;
        else
            amt = 200 * 7.0 + (u - 200) * 9.5;
        return amt + 150;
    }
    string type()
    {
        return "Commercial";
    }
};

class Industrial : public Consumer
{
public:
    float bill()
    {
        return units() * 8.5 + 500;
    }
    string type()
    {
        return "Industrial";
    }
};

int main()
{
    Consumer *list[50];
    int n = 0, ch, t, id;

do
    {
        cout << "\n===== Electricity Billing System =====" << endl;
        cout << "1. Add consumer" << endl;
        cout << "2. Show all bills" << endl;
        cout << "3. Search by consumer id" << endl;
        cout << "4. Exit" << endl;
        cout << "Enter choice: ";
        cin >> ch;

switch (ch)
        {
        case 1:
            if (n >= 50)
            {
                cout << "Limit reached" << endl;
                break;
            }
            cout << "1. Domestic  2. Commercial  3. Industrial" << endl;
            cout << "Enter type: ";
            cin >> t;
            if (t == 1)
                list[n] = new Domestic;
            else if (t == 2)
                list[n] = new Commercial;
            else if (t == 3)
                list[n] = new Industrial;
            else
            {
                cout << "Invalid type" << endl;
                break;
            }
            list[n]->getData();
            n++;
            cout << "Consumer added" << endl;
            break;

case 2:
            if (n == 0)
                cout << "No records" << endl;
            for (int i = 0; i < n; i++)
                list[i]->showBill();
            break;

case 3:
        {
            cout << "Enter consumer id: ";
            cin >> id;
            bool found = false;
            for (int i = 0; i < n; i++)
            {
                if (list[i]->getId() == id)
                {
                    list[i]->showBill();
                    found = true;
                }
            }
            if (!found)
                cout << "Consumer not found" << endl;
            break;
        }

case 4:
            cout << "Exiting..." << endl;
            break;

default:
            cout << "Invalid choice" << endl;
        }
    } while (ch != 4);

for (int i = 0; i < n; i++)
        delete list[i];

return 0;
}

1	#include <iostream>
2	using namespace std;
3
4	class Consumer
5	{
6	protected:
7	int id;
8	string name;
9	int prevReading, currReading;
10
11	public:
12	void getData()
13	{
14	cout << "Enter consumer id: ";
15	cin >> id;
16	cout << "Enter name: ";
17	cin >> name;
18	cout << "Enter previous reading: ";
19	cin >> prevReading;
20	cout << "Enter current reading: ";
21	cin >> currReading;
22	while (currReading < prevReading)
23	{
24	cout << "Current reading cannot be less than previous. Enter again: ";
25	cin >> currReading;
26	}
27	}
28
29	int units()
30	{
31	return currReading - prevReading;
32	}
33
34	int getId()
35	{
36	return id;
37	}
38
39	virtual float bill() = 0;
40	virtual string type() = 0;
41
42	void showBill()
43	{
44	cout << "\n-------- ELECTRICITY BILL --------" << endl;
45	cout << "Consumer ID : " << id << endl;
46	cout << "Name : " << name << endl;
47	cout << "Type : " << type() << endl;
48	cout << "Units consumed: " << units() << endl;
49	cout << "Bill amount : Rs. " << bill() << endl;
50	cout << "----------------------------------" << endl;
51	}
52
53	virtual ~Consumer() {}
54	};
55
56	class Domestic : public Consumer
57	{
58	public:
59	float bill()
60	{
61	int u = units();
62	float amt;
63	if (u <= 100)
64	amt = u * 3.5;
65	else if (u <= 300)
66	amt = 100 * 3.5 + (u - 100) * 5.0;
67	else
68	amt = 100 * 3.5 + 200 * 5.0 + (u - 300) * 7.5;
69	return amt + 50;
70	}
71	string type()
72	{
73	return "Domestic";
74	}
75	};
76
77	class Commercial : public Consumer
78	{
79	public:
80	float bill()
81	{
82	int u = units();
83	float amt;
84	if (u <= 200)
85	amt = u * 7.0;
86	else
87	amt = 200 * 7.0 + (u - 200) * 9.5;
88	return amt + 150;
89	}
90	string type()
91	{
92	return "Commercial";
93	}
94	};
95
96	class Industrial : public Consumer
97	{
98	public:
99	float bill()
100	{
101	return units() * 8.5 + 500;
102	}
103	string type()
104	{
105	return "Industrial";
106	}
107	};
108
109	int main()
110	{
111	Consumer *list[50];
112	int n = 0, ch, t, id;
113
114	do
115	{
116	cout << "\n===== Electricity Billing System =====" << endl;
117	cout << "1. Add consumer" << endl;
118	cout << "2. Show all bills" << endl;
119	cout << "3. Search by consumer id" << endl;
120	cout << "4. Exit" << endl;
121	cout << "Enter choice: ";
122	cin >> ch;
123
124	switch (ch)
125	{
126	case 1:
127	if (n >= 50)
128	{
129	cout << "Limit reached" << endl;
130	break;
131	}
132	cout << "1. Domestic 2. Commercial 3. Industrial" << endl;
133	cout << "Enter type: ";
134	cin >> t;
135	if (t == 1)
136	list[n] = new Domestic;
137	else if (t == 2)
138	list[n] = new Commercial;
139	else if (t == 3)
140	list[n] = new Industrial;
141	else
142	{
143	cout << "Invalid type" << endl;
144	break;
145	}
146	list[n]->getData();
147	n++;
148	cout << "Consumer added" << endl;
149	break;
150
151	case 2:
152	if (n == 0)
153	cout << "No records" << endl;
154	for (int i = 0; i < n; i++)
155	list[i]->showBill();
156	break;
157
158	case 3:
159	{
160	cout << "Enter consumer id: ";
161	cin >> id;
162	bool found = false;
163	for (int i = 0; i < n; i++)
164	{
165	if (list[i]->getId() == id)
166	{
167	list[i]->showBill();
168	found = true;
169	}
170	}
171	if (!found)
172	cout << "Consumer not found" << endl;
173	break;
174	}
175
176	case 4:
177	cout << "Exiting..." << endl;
178	break;
179
180	default:
181	cout << "Invalid choice" << endl;
182	}
183	} while (ch != 4);
184
185	for (int i = 0; i < n; i++)
186	delete list[i];
187
188	return 0;
189	}
190

exp2.cpp · 922 B · C++ Raw

1	#include <iostream>
2	using namespace std;
3
4	class Rectangle
5	{
6	int length, breadth;
7
8	public:
9	void setData(int l, int b)
10	{
11	length = l;
12	breadth = b;
13	}
14
15	int area()
16	{
17	return length * breadth;
18	}
19
20	int perimeter();
21	void display();
22	};
23
24	int Rectangle::perimeter()
25	{
26	return 2 * (length + breadth);
27	}
28
29	void Rectangle::display()
30	{
31	cout << "Length = " << length << ", Breadth = " << breadth << endl;
32	cout << "Area = " << area() << endl;
33	cout << "Perimeter = " << perimeter() << endl;
34	}
35
36	int main()
37	{
38	Rectangle r1, r2;
39	int l, b;
40
41	cout << "Enter length and breadth of rectangle 1: ";
42	cin >> l >> b;
43	r1.setData(l, b);
44
45	cout << "Enter length and breadth of rectangle 2: ";
46	cin >> l >> b;
47	r2.setData(l, b);
48
49	cout << "\nRectangle 1" << endl;
50	r1.display();
51	cout << "\nRectangle 2" << endl;
52	r2.display();
53
54	return 0;
55	}
56

exp3.cpp · 879 B · C++ Raw

1	#include <iostream>
2	using namespace std;
3
4	class Box
5	{
6	int l, b, h;
7
8	public:
9	Box()
10	{
11	l = b = h = 1;
12	cout << "Default constructor called" << endl;
13	}
14
15	Box(int x, int y, int z)
16	{
17	l = x;
18	b = y;
19	h = z;
20	cout << "Parameterized constructor called" << endl;
21	}
22
23	Box(Box &obj)
24	{
25	l = obj.l;
26	b = obj.b;
27	h = obj.h;
28	cout << "Copy constructor called" << endl;
29	}
30
31	int volume()
32	{
33	return l * b * h;
34	}
35
36	~Box()
37	{
38	cout << "Destructor called for box with volume " << volume() << endl;
39	}
40	};
41
42	int main()
43	{
44	Box b1;
45	Box b2(2, 3, 4);
46	Box b3(b2);
47
48	cout << "\nVolume of b1 = " << b1.volume() << endl;
49	cout << "Volume of b2 = " << b2.volume() << endl;
50	cout << "Volume of b3 = " << b3.volume() << endl << endl;
51
52	return 0;
53	}
54

exp4.cpp · 625 B · C++ Raw

1	#include <iostream>
2	using namespace std;
3
4	int total = 0;
5
6	class Test
7	{
8	int id;
9
10	public:
11	Test()
12	{
13	total++;
14	id = total;
15	cout << "Object " << id << " created" << endl;
16	}
17
18	~Test()
19	{
20	cout << "Object " << id << " destroyed" << endl;
21	total--;
22	}
23	};
24
25	int main()
26	{
27	cout << "Inside main" << endl;
28	Test t1, t2;
29
30	{
31	cout << "\nEntering block" << endl;
32	Test t3, t4;
33	cout << "Leaving block" << endl;
34	}
35
36	cout << "\nBack in main" << endl;
37	Test *p = new Test;
38	delete p;
39
40	cout << "\nEnd of main" << endl;
41	return 0;
42	}
43

exp5.cpp · 1.0 KiB · C++ Raw

#include <iostream>
using namespace std;

class Area
{
public:
    float area(float r)
    {
        return 3.14 * r * r;
    }

int area(int l, int b)
    {
        return l * b;
    }

float area(float b, float h, int t)
    {
        return 0.5 * b * h;
    }
};

int add(int a, int b)
{
    return a + b;
}

int add(int a, int b, int c)
{
    return a + b + c;
}

double add(double a, double b)
{
    return a + b;
}

int main()
{
    Area a;
    float r, base, height;
    int l, b;

cout << "Enter radius of circle: ";
    cin >> r;
    cout << "Area of circle = " << a.area(r) << endl;

cout << "Enter length and breadth of rectangle: ";
    cin >> l >> b;
    cout << "Area of rectangle = " << a.area(l, b) << endl;

cout << "Enter base and height of triangle: ";
    cin >> base >> height;
    cout << "Area of triangle = " << a.area(base, height, 1) << endl;

cout << "\nadd(2, 3) = " << add(2, 3) << endl;
    cout << "add(2, 3, 4) = " << add(2, 3, 4) << endl;
    cout << "add(2.5, 3.7) = " << add(2.5, 3.7) << endl;

return 0;
}

1	#include <iostream>
2	using namespace std;
3
4	class Area
5	{
6	public:
7	float area(float r)
8	{
9	return 3.14 * r * r;
10	}
11
12	int area(int l, int b)
13	{
14	return l * b;
15	}
16
17	float area(float b, float h, int t)
18	{
19	return 0.5 * b * h;
20	}
21	};
22
23	int add(int a, int b)
24	{
25	return a + b;
26	}
27
28	int add(int a, int b, int c)
29	{
30	return a + b + c;
31	}
32
33	double add(double a, double b)
34	{
35	return a + b;
36	}
37
38	int main()
39	{
40	Area a;
41	float r, base, height;
42	int l, b;
43
44	cout << "Enter radius of circle: ";
45	cin >> r;
46	cout << "Area of circle = " << a.area(r) << endl;
47
48	cout << "Enter length and breadth of rectangle: ";
49	cin >> l >> b;
50	cout << "Area of rectangle = " << a.area(l, b) << endl;
51
52	cout << "Enter base and height of triangle: ";
53	cin >> base >> height;
54	cout << "Area of triangle = " << a.area(base, height, 1) << endl;
55
56	cout << "\nadd(2, 3) = " << add(2, 3) << endl;
57	cout << "add(2, 3, 4) = " << add(2, 3, 4) << endl;
58	cout << "add(2.5, 3.7) = " << add(2.5, 3.7) << endl;
59
60	return 0;
61	}
62

exp6.cpp · 1.5 KiB · C++ Raw

#include <iostream>
using namespace std;

class Complex
{
    float real, imag;

public:
    Complex()
    {
        real = 0;
        imag = 0;
    }

Complex(float r, float i)
    {
        real = r;
        imag = i;
    }

Complex operator+(Complex c)
    {
        Complex temp;
        temp.real = real + c.real;
        temp.imag = imag + c.imag;
        return temp;
    }

Complex operator-(Complex c)
    {
        Complex temp;
        temp.real = real - c.real;
        temp.imag = imag - c.imag;
        return temp;
    }

void operator-()
    {
        real = -real;
        imag = -imag;
    }

bool operator==(Complex c)
    {
        return (real == c.real && imag == c.imag);
    }

void display()
    {
        if (imag >= 0)
            cout << real << " + " << imag << "i" << endl;
        else
            cout << real << " - " << -imag << "i" << endl;
    }
};

int main()
{
    float r, i;
    cout << "Enter real and imaginary part of first number: ";
    cin >> r >> i;
    Complex c1(r, i);

cout << "Enter real and imaginary part of second number: ";
    cin >> r >> i;
    Complex c2(r, i);

Complex c3 = c1 + c2;
    Complex c4 = c1 - c2;

cout << "\nc1 = ";
    c1.display();
    cout << "c2 = ";
    c2.display();
    cout << "c1 + c2 = ";
    c3.display();
    cout << "c1 - c2 = ";
    c4.display();

if (c1 == c2)
        cout << "c1 and c2 are equal" << endl;
    else
        cout << "c1 and c2 are not equal" << endl;

-c1;
    cout << "After unary minus, c1 = ";
    c1.display();

return 0;
}

1	#include <iostream>
2	using namespace std;
3
4	class Complex
5	{
6	float real, imag;
7
8	public:
9	Complex()
10	{
11	real = 0;
12	imag = 0;
13	}
14
15	Complex(float r, float i)
16	{
17	real = r;
18	imag = i;
19	}
20
21	Complex operator+(Complex c)
22	{
23	Complex temp;
24	temp.real = real + c.real;
25	temp.imag = imag + c.imag;
26	return temp;
27	}
28
29	Complex operator-(Complex c)
30	{
31	Complex temp;
32	temp.real = real - c.real;
33	temp.imag = imag - c.imag;
34	return temp;
35	}
36
37	void operator-()
38	{
39	real = -real;
40	imag = -imag;
41	}
42
43	bool operator==(Complex c)
44	{
45	return (real == c.real && imag == c.imag);
46	}
47
48	void display()
49	{
50	if (imag >= 0)
51	cout << real << " + " << imag << "i" << endl;
52	else
53	cout << real << " - " << -imag << "i" << endl;
54	}
55	};
56
57	int main()
58	{
59	float r, i;
60	cout << "Enter real and imaginary part of first number: ";
61	cin >> r >> i;
62	Complex c1(r, i);
63
64	cout << "Enter real and imaginary part of second number: ";
65	cin >> r >> i;
66	Complex c2(r, i);
67
68	Complex c3 = c1 + c2;
69	Complex c4 = c1 - c2;
70
71	cout << "\nc1 = ";
72	c1.display();
73	cout << "c2 = ";
74	c2.display();
75	cout << "c1 + c2 = ";
76	c3.display();
77	cout << "c1 - c2 = ";
78	c4.display();
79
80	if (c1 == c2)
81	cout << "c1 and c2 are equal" << endl;
82	else
83	cout << "c1 and c2 are not equal" << endl;
84
85	-c1;
86	cout << "After unary minus, c1 = ";
87	c1.display();
88
89	return 0;
90	}
91

exp7.cpp · 1.0 KiB · C++ Raw

#include <iostream>
using namespace std;

class B;

class A
{
    int x;

public:
    void setData(int n)
    {
        x = n;
    }
    friend void findMax(A, B);
    friend void swapValues(A &, B &);
    friend void show(A, B);
};

class B
{
    int y;

public:
    void setData(int n)
    {
        y = n;
    }
    friend void findMax(A, B);
    friend void swapValues(A &, B &);
    friend void show(A, B);
};

void findMax(A a, B b)
{
    if (a.x > b.y)
        cout << "Maximum is " << a.x << endl;
    else
        cout << "Maximum is " << b.y << endl;
}

void swapValues(A &a, B &b)
{
    int temp = a.x;
    a.x = b.y;
    b.y = temp;
}

void show(A a, B b)
{
    cout << "A = " << a.x << ", B = " << b.y << endl;
}

int main()
{
    A a;
    B b;
    int n1, n2;

cout << "Enter value for class A: ";
    cin >> n1;
    cout << "Enter value for class B: ";
    cin >> n2;

a.setData(n1);
    b.setData(n2);

show(a, b);
    findMax(a, b);

swapValues(a, b);
    cout << "After swapping: ";
    show(a, b);

return 0;
}

1	#include <iostream>
2	using namespace std;
3
4	class B;
5
6	class A
7	{
8	int x;
9
10	public:
11	void setData(int n)
12	{
13	x = n;
14	}
15	friend void findMax(A, B);
16	friend void swapValues(A &, B &);
17	friend void show(A, B);
18	};
19
20	class B
21	{
22	int y;
23
24	public:
25	void setData(int n)
26	{
27	y = n;
28	}
29	friend void findMax(A, B);
30	friend void swapValues(A &, B &);
31	friend void show(A, B);
32	};
33
34	void findMax(A a, B b)
35	{
36	if (a.x > b.y)
37	cout << "Maximum is " << a.x << endl;
38	else
39	cout << "Maximum is " << b.y << endl;
40	}
41
42	void swapValues(A &a, B &b)
43	{
44	int temp = a.x;
45	a.x = b.y;
46	b.y = temp;
47	}
48
49	void show(A a, B b)
50	{
51	cout << "A = " << a.x << ", B = " << b.y << endl;
52	}
53
54	int main()
55	{
56	A a;
57	B b;
58	int n1, n2;
59
60	cout << "Enter value for class A: ";
61	cin >> n1;
62	cout << "Enter value for class B: ";
63	cin >> n2;
64
65	a.setData(n1);
66	b.setData(n2);
67
68	show(a, b);
69	findMax(a, b);
70
71	swapValues(a, b);
72	cout << "After swapping: ";
73	show(a, b);
74
75	return 0;
76	}
77

exp8.cpp · 1.9 KiB · C++ Raw

#include <iostream>
using namespace std;

class Person
{
protected:
    string name;
    int age;

public:
    void getPerson()
    {
        cout << "Enter name: ";
        cin >> name;
        cout << "Enter age: ";
        cin >> age;
    }
    void showPerson()
    {
        cout << "Name: " << name << endl;
        cout << "Age: " << age << endl;
    }
};

class Student : public Person
{
protected:
    int roll;

public:
    void getStudent()
    {
        getPerson();
        cout << "Enter roll no: ";
        cin >> roll;
    }
    void showStudent()
    {
        showPerson();
        cout << "Roll No: " << roll << endl;
    }
};

class Exam : public Student
{
protected:
    float m1, m2;

public:
    void getMarks()
    {
        cout << "Enter marks of 2 subjects: ";
        cin >> m1 >> m2;
    }
    void showMarks()
    {
        cout << "Marks: " << m1 << ", " << m2 << endl;
    }
};

class Sports
{
protected:
    float score;

public:
    void getScore()
    {
        cout << "Enter sports score: ";
        cin >> score;
    }
};

class Result : public Exam, public Sports
{
public:
    void display()
    {
        showStudent();
        showMarks();
        cout << "Sports score: " << score << endl;
        cout << "Total: " << m1 + m2 + score << endl;
    }
};

class Teacher : public Person
{
    string subject;

public:
    void getTeacher()
    {
        getPerson();
        cout << "Enter subject: ";
        cin >> subject;
    }
    void showTeacher()
    {
        showPerson();
        cout << "Subject: " << subject << endl;
    }
};

int main()
{
    Result r;
    cout << "--- Student Details ---" << endl;
    r.getStudent();
    r.getMarks();
    r.getScore();

Teacher t;
    cout << "\n--- Teacher Details ---" << endl;
    t.getTeacher();

cout << "\n--- Student Result ---" << endl;
    r.display();

cout << "\n--- Teacher Info ---" << endl;
    t.showTeacher();

return 0;
}

1	#include <iostream>
2	using namespace std;
3
4	class Person
5	{
6	protected:
7	string name;
8	int age;
9
10	public:
11	void getPerson()
12	{
13	cout << "Enter name: ";
14	cin >> name;
15	cout << "Enter age: ";
16	cin >> age;
17	}
18	void showPerson()
19	{
20	cout << "Name: " << name << endl;
21	cout << "Age: " << age << endl;
22	}
23	};
24
25	class Student : public Person
26	{
27	protected:
28	int roll;
29
30	public:
31	void getStudent()
32	{
33	getPerson();
34	cout << "Enter roll no: ";
35	cin >> roll;
36	}
37	void showStudent()
38	{
39	showPerson();
40	cout << "Roll No: " << roll << endl;
41	}
42	};
43
44	class Exam : public Student
45	{
46	protected:
47	float m1, m2;
48
49	public:
50	void getMarks()
51	{
52	cout << "Enter marks of 2 subjects: ";
53	cin >> m1 >> m2;
54	}
55	void showMarks()
56	{
57	cout << "Marks: " << m1 << ", " << m2 << endl;
58	}
59	};
60
61	class Sports
62	{
63	protected:
64	float score;
65
66	public:
67	void getScore()
68	{
69	cout << "Enter sports score: ";
70	cin >> score;
71	}
72	};
73
74	class Result : public Exam, public Sports
75	{
76	public:
77	void display()
78	{
79	showStudent();
80	showMarks();
81	cout << "Sports score: " << score << endl;
82	cout << "Total: " << m1 + m2 + score << endl;
83	}
84	};
85
86	class Teacher : public Person
87	{
88	string subject;
89
90	public:
91	void getTeacher()
92	{
93	getPerson();
94	cout << "Enter subject: ";
95	cin >> subject;
96	}
97	void showTeacher()
98	{
99	showPerson();
100	cout << "Subject: " << subject << endl;
101	}
102	};
103
104	int main()
105	{
106	Result r;
107	cout << "--- Student Details ---" << endl;
108	r.getStudent();
109	r.getMarks();
110	r.getScore();
111
112	Teacher t;
113	cout << "\n--- Teacher Details ---" << endl;
114	t.getTeacher();
115
116	cout << "\n--- Student Result ---" << endl;
117	r.display();
118
119	cout << "\n--- Teacher Info ---" << endl;
120	t.showTeacher();
121
122	return 0;
123	}
124

exp9.cpp · 1.5 KiB · C++ Raw

#include <iostream>
using namespace std;

class Shape
{
public:
    virtual void area() = 0;
    virtual void name()
    {
        cout << "This is a shape" << endl;
    }
    virtual ~Shape() {}
};

class Circle : public Shape
{
    float r;

public:
    Circle(float x)
    {
        r = x;
    }
    void name()
    {
        cout << "This is a circle" << endl;
    }
    void area()
    {
        cout << "Area = " << 3.14 * r * r << endl;
    }
};

class Rectangle : public Shape
{
    float l, b;

public:
    Rectangle(float x, float y)
    {
        l = x;
        b = y;
    }
    void name()
    {
        cout << "This is a rectangle" << endl;
    }
    void area()
    {
        cout << "Area = " << l * b << endl;
    }
};

class Triangle : public Shape
{
    float b, h;

public:
    Triangle(float x, float y)
    {
        b = x;
        h = y;
    }
    void area()
    {
        cout << "Area = " << 0.5 * b * h << endl;
    }
};

int main()
{
    float r, l, b, tb, h;
    cout << "Enter radius of circle: ";
    cin >> r;
    cout << "Enter length and breadth of rectangle: ";
    cin >> l >> b;
    cout << "Enter base and height of triangle: ";
    cin >> tb >> h;

Shape *s[3];
    s[0] = new Circle(r);
    s[1] = new Rectangle(l, b);
    s[2] = new Triangle(tb, h);

cout << endl;
    for (int i = 0; i < 3; i++)
    {
        s[i]->name();
        s[i]->area();
        cout << endl;
    }

for (int i = 0; i < 3; i++)
        delete s[i];

return 0;
}

1	#include <iostream>
2	using namespace std;
3
4	class Shape
5	{
6	public:
7	virtual void area() = 0;
8	virtual void name()
9	{
10	cout << "This is a shape" << endl;
11	}
12	virtual ~Shape() {}
13	};
14
15	class Circle : public Shape
16	{
17	float r;
18
19	public:
20	Circle(float x)
21	{
22	r = x;
23	}
24	void name()
25	{
26	cout << "This is a circle" << endl;
27	}
28	void area()
29	{
30	cout << "Area = " << 3.14 * r * r << endl;
31	}
32	};
33
34	class Rectangle : public Shape
35	{
36	float l, b;
37
38	public:
39	Rectangle(float x, float y)
40	{
41	l = x;
42	b = y;
43	}
44	void name()
45	{
46	cout << "This is a rectangle" << endl;
47	}
48	void area()
49	{
50	cout << "Area = " << l * b << endl;
51	}
52	};
53
54	class Triangle : public Shape
55	{
56	float b, h;
57
58	public:
59	Triangle(float x, float y)
60	{
61	b = x;
62	h = y;
63	}
64	void area()
65	{
66	cout << "Area = " << 0.5 * b * h << endl;
67	}
68	};
69
70	int main()
71	{
72	float r, l, b, tb, h;
73	cout << "Enter radius of circle: ";
74	cin >> r;
75	cout << "Enter length and breadth of rectangle: ";
76	cin >> l >> b;
77	cout << "Enter base and height of triangle: ";
78	cin >> tb >> h;
79
80	Shape *s[3];
81	s[0] = new Circle(r);
82	s[1] = new Rectangle(l, b);
83	s[2] = new Triangle(tb, h);
84
85	cout << endl;
86	for (int i = 0; i < 3; i++)
87	{
88	s[i]->name();
89	s[i]->area();
90	cout << endl;
91	}
92
93	for (int i = 0; i < 3; i++)
94	delete s[i];
95
96	return 0;
97	}
98