k / B63 OOP

exp1.cpp · 286 B · C++ Raw #include <iostream> using namespace std; class Mobile { public: string brand; int price; void show() { cout << brand << " costs " << price << endl; } }; int main() { Mobile m; m.brand = "Samsung"; m.price = 15000; m.show(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Mobile
5	{
6	public:
7	string brand;
8	int price;
9	void show()
10	{
11	cout << brand << " costs " << price << endl;
12	}
13	};
14
15	int main()
16	{
17	Mobile m;
18	m.brand = "Samsung";
19	m.price = 15000;
20	m.show();
21	return 0;
22	}
23

exp2.cpp · 287 B · C++ Raw #include <iostream> using namespace std; class Stud { public: int roll; void show() { cout << "Roll: " << roll << endl; } }; int main() { Stud s[3]; for (int i = 0; i < 3; i++) { s[i].roll = i + 1; s[i].show(); } return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Stud
5	{
6	public:
7	int roll;
8	void show()
9	{
10	cout << "Roll: " << roll << endl;
11	}
12	};
13
14	int main()
15	{
16	Stud s[3];
17	for (int i = 0; i < 3; i++)
18	{
19	s[i].roll = i + 1;
20	s[i].show();
21	}
22	return 0;
23	}
24

exp3.cpp · 456 B · C++ Raw #include <iostream> using namespace std; class Point { int x, y; public: Point(int a, int b) { x = a; y = b; } Point(Point &p) { x = p.x; y = p.y; } void show() { cout << "(" << x << ", " << y << ")" << endl; } ~Point() { cout << "Destructor" << endl; } }; int main() { Point p1(2, 3); Point p2(p1); p1.show(); p2.show(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Point
5	{
6	int x, y;
7	public:
8	Point(int a, int b)
9	{
10	x = a;
11	y = b;
12	}
13	Point(Point &p)
14	{
15	x = p.x;
16	y = p.y;
17	}
18	void show()
19	{
20	cout << "(" << x << ", " << y << ")" << endl;
21	}
22	~Point()
23	{
24	cout << "Destructor" << endl;
25	}
26	};
27
28	int main()
29	{
30	Point p1(2, 3);
31	Point p2(p1);
32	p1.show();
33	p2.show();
34	return 0;
35	}
36

exp4.cpp · 287 B · C++ Raw #include <iostream> using namespace std; class Arr { int *p; public: Arr() { p = new int[5]; cout << "Memory given" << endl; } ~Arr() { delete[] p; cout << "Memory freed" << endl; } }; int main() { Arr a; return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Arr
5	{
6	int *p;
7	public:
8	Arr()
9	{
10	p = new int[5];
11	cout << "Memory given" << endl;
12	}
13	~Arr()
14	{
15	delete[] p;
16	cout << "Memory freed" << endl;
17	}
18	};
19
20	int main()
21	{
22	Arr a;
23	return 0;
24	}
25

exp5.cpp · 364 B · C++ Raw #include <iostream> using namespace std; int vol(int a) { return a * a * a; } float vol(float r, int h) { return 3.14 * r * r * h; } int vol(int l, int b, int h) { return l * b * h; } int main() { cout << "Cube: " << vol(3) << endl; cout << "Cylinder: " << vol(2.0f, 5) << endl; cout << "Box: " << vol(2, 3, 4) << endl; return 0; }

1	#include <iostream>
2	using namespace std;
3
4	int vol(int a)
5	{
6	return a * a * a;
7	}
8
9	float vol(float r, int h)
10	{
11	return 3.14 * r * r * h;
12	}
13
14	int vol(int l, int b, int h)
15	{
16	return l * b * h;
17	}
18
19	int main()
20	{
21	cout << "Cube: " << vol(3) << endl;
22	cout << "Cylinder: " << vol(2.0f, 5) << endl;
23	cout << "Box: " << vol(2, 3, 4) << endl;
24	return 0;
25	}
26

exp6.cpp · 305 B · C++ Raw #include <iostream> using namespace std; class Num { public: int x; bool operator==(Num n) { return x == n.x; } }; int main() { Num a, b; a.x = 5; b.x = 5; if (a == b) cout << "Equal" << endl; else cout << "Not equal" << endl; return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Num
5	{
6	public:
7	int x;
8	bool operator==(Num n)
9	{
10	return x == n.x;
11	}
12	};
13
14	int main()
15	{
16	Num a, b;
17	a.x = 5;
18	b.x = 5;
19	if (a == b)
20	cout << "Equal" << endl;
21	else
22	cout << "Not equal" << endl;
23	return 0;
24	}
25

exp7.cpp · 286 B · C++ Raw #include <iostream> using namespace std; class A { int x; public: A() { x = 100; } friend class B; }; class B { public: void show(A a) { cout << "x = " << a.x << endl; } }; int main() { A a; B b; b.show(a); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class A
5	{
6	int x;
7	public:
8	A()
9	{
10	x = 100;
11	}
12	friend class B;
13	};
14
15	class B
16	{
17	public:
18	void show(A a)
19	{
20	cout << "x = " << a.x << endl;
21	}
22	};
23
24	int main()
25	{
26	A a;
27	B b;
28	b.show(a);
29	return 0;
30	}
31

exp8.cpp · 496 B · C++ Raw #include <iostream> using namespace std; class Shape { public: int a, b; void set(int x, int y) { a = x; b = y; } }; class Rect : public Shape { public: void area() { cout << "Rect: " << a * b << endl; } }; class Tri : public Shape { public: void area() { cout << "Triangle: " << 0.5 * a * b << endl; } }; int main() { Rect r; Tri t; r.set(4, 5); t.set(4, 5); r.area(); t.area(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Shape
5	{
6	public:
7	int a, b;
8	void set(int x, int y)
9	{
10	a = x;
11	b = y;
12	}
13	};
14
15	class Rect : public Shape
16	{
17	public:
18	void area()
19	{
20	cout << "Rect: " << a * b << endl;
21	}
22	};
23
24	class Tri : public Shape
25	{
26	public:
27	void area()
28	{
29	cout << "Triangle: " << 0.5 * a * b << endl;
30	}
31	};
32
33	int main()
34	{
35	Rect r;
36	Tri t;
37	r.set(4, 5);
38	t.set(4, 5);
39	r.area();
40	t.area();
41	return 0;
42	}
43

exp9.cpp · 515 B · C++ Raw #include <iostream> using namespace std; class Emp { public: virtual void pay() { cout << "Basic pay" << endl; } }; class Manager : public Emp { public: void pay() { cout << "Manager pay 50000" << endl; } }; class Clerk : public Emp { public: void pay() { cout << "Clerk pay 20000" << endl; } }; int main() { Emp *e[2]; Manager m; Clerk c; e[0] = &m; e[1] = &c; for (int i = 0; i < 2; i++) e[i]->pay(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Emp
5	{
6	public:
7	virtual void pay()
8	{
9	cout << "Basic pay" << endl;
10	}
11	};
12
13	class Manager : public Emp
14	{
15	public:
16	void pay()
17	{
18	cout << "Manager pay 50000" << endl;
19	}
20	};
21
22	class Clerk : public Emp
23	{
24	public:
25	void pay()
26	{
27	cout << "Clerk pay 20000" << endl;
28	}
29	};
30
31	int main()
32	{
33	Emp *e[2];
34	Manager m;
35	Clerk c;
36	e[0] = &m;
37	e[1] = &c;
38	for (int i = 0; i < 2; i++)
39	e[i]->pay();
40	return 0;
41	}
42