k / B65 OOP

exp1.cpp · 311 B · C++ Raw #include <iostream> using namespace std; class Book { public: string title; int price; void show() { cout << "Title: " << title << endl; cout << "Price: " << price << endl; } }; int main() { Book b; b.title = "C++"; b.price = 300; b.show(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Book
5	{
6	public:
7	string title;
8	int price;
9	void show()
10	{
11	cout << "Title: " << title << endl;
12	cout << "Price: " << price << endl;
13	}
14	};
15
16	int main()
17	{
18	Book b;
19	b.title = "C++";
20	b.price = 300;
21	b.show();
22	return 0;
23	}
24

exp2.cpp · 354 B · C++ Raw #include <iostream> using namespace std; class Bank { int bal; public: void set() { bal = 1000; } void deposit(int a) { bal = bal + a; } void show(); }; void Bank::show() { cout << "Balance: " << bal << endl; } int main() { Bank b; b.set(); b.deposit(500); b.show(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Bank
5	{
6	int bal;
7	public:
8	void set()
9	{
10	bal = 1000;
11	}
12	void deposit(int a)
13	{
14	bal = bal + a;
15	}
16	void show();
17	};
18
19	void Bank::show()
20	{
21	cout << "Balance: " << bal << endl;
22	}
23
24	int main()
25	{
26	Bank b;
27	b.set();
28	b.deposit(500);
29	b.show();
30	return 0;
31	}
32

exp3.cpp · 409 B · C++ Raw #include <iostream> using namespace std; class Circle { float r; public: Circle() { r = 1; } Circle(float x) { r = x; } void area() { cout << "Area: " << 3.14 * r * r << endl; } ~Circle() { cout << "Circle destroyed" << endl; } }; int main() { Circle c1; Circle c2(3); c1.area(); c2.area(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Circle
5	{
6	float r;
7	public:
8	Circle()
9	{
10	r = 1;
11	}
12	Circle(float x)
13	{
14	r = x;
15	}
16	void area()
17	{
18	cout << "Area: " << 3.14 * r * r << endl;
19	}
20	~Circle()
21	{
22	cout << "Circle destroyed" << endl;
23	}
24	};
25
26	int main()
27	{
28	Circle c1;
29	Circle c2(3);
30	c1.area();
31	c2.area();
32	return 0;
33	}
34

exp4.cpp · 258 B · C++ Raw #include <iostream> using namespace std; class Demo { public: Demo() { cout << "Constructor" << endl; } ~Demo() { cout << "Destructor" << endl; } }; int main() { Demo *p = new Demo; delete p; return 0; }

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

exp5.cpp · 297 B · C++ Raw #include <iostream> using namespace std; void print(int a) { cout << "Int: " << a << endl; } void print(double a) { cout << "Double: " << a << endl; } void print(char a) { cout << "Char: " << a << endl; } int main() { print(10); print(5.5); print('A'); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	void print(int a)
5	{
6	cout << "Int: " << a << endl;
7	}
8
9	void print(double a)
10	{
11	cout << "Double: " << a << endl;
12	}
13
14	void print(char a)
15	{
16	cout << "Char: " << a << endl;
17	}
18
19	int main()
20	{
21	print(10);
22	print(5.5);
23	print('A');
24	return 0;
25	}
26

exp6.cpp · 377 B · C++ Raw #include <iostream> using namespace std; class Complex { public: int r, i; Complex operator+(Complex c) { Complex t; t.r = r + c.r; t.i = i + c.i; return t; } }; int main() { Complex a, b, c; a.r = 2; a.i = 3; b.r = 4; b.i = 5; c = a + b; cout << c.r << " + " << c.i << "i" << endl; return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Complex
5	{
6	public:
7	int r, i;
8	Complex operator+(Complex c)
9	{
10	Complex t;
11	t.r = r + c.r;
12	t.i = i + c.i;
13	return t;
14	}
15	};
16
17	int main()
18	{
19	Complex a, b, c;
20	a.r = 2;
21	a.i = 3;
22	b.r = 4;
23	b.i = 5;
24	c = a + b;
25	cout << c.r << " + " << c.i << "i" << endl;
26	return 0;
27	}
28

exp7.cpp · 326 B · C++ Raw #include <iostream> using namespace std; class Stud { int m1, m2, m3; public: Stud() { m1 = 70; m2 = 80; m3 = 90; } friend void avg(Stud s); }; void avg(Stud s) { cout << "Average: " << (s.m1 + s.m2 + s.m3) / 3 << endl; } int main() { Stud s; avg(s); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Stud
5	{
6	int m1, m2, m3;
7	public:
8	Stud()
9	{
10	m1 = 70;
11	m2 = 80;
12	m3 = 90;
13	}
14	friend void avg(Stud s);
15	};
16
17	void avg(Stud s)
18	{
19	cout << "Average: " << (s.m1 + s.m2 + s.m3) / 3 << endl;
20	}
21
22	int main()
23	{
24	Stud s;
25	avg(s);
26	return 0;
27	}
28

exp8.cpp · 307 B · C++ Raw #include <iostream> using namespace std; class Animal { public: void eat() { cout << "Animal eats" << endl; } }; class Dog : public Animal { public: void bark() { cout << "Dog barks" << endl; } }; int main() { Dog d; d.eat(); d.bark(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Animal
5	{
6	public:
7	void eat()
8	{
9	cout << "Animal eats" << endl;
10	}
11	};
12
13	class Dog : public Animal
14	{
15	public:
16	void bark()
17	{
18	cout << "Dog barks" << endl;
19	}
20	};
21
22	int main()
23	{
24	Dog d;
25	d.eat();
26	d.bark();
27	return 0;
28	}
29

exp9.cpp · 423 B · C++ Raw #include <iostream> using namespace std; class Animal { public: virtual void sound() = 0; }; class Dog : public Animal { public: void sound() { cout << "Bark" << endl; } }; class Cat : public Animal { public: void sound() { cout << "Meow" << endl; } }; int main() { Animal *a; Dog d; Cat c; a = &d; a->sound(); a = &c; a->sound(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Animal
5	{
6	public:
7	virtual void sound() = 0;
8	};
9
10	class Dog : public Animal
11	{
12	public:
13	void sound()
14	{
15	cout << "Bark" << endl;
16	}
17	};
18
19	class Cat : public Animal
20	{
21	public:
22	void sound()
23	{
24	cout << "Meow" << endl;
25	}
26	};
27
28	int main()
29	{
30	Animal *a;
31	Dog d;
32	Cat c;
33	a = &d;
34	a->sound();
35	a = &c;
36	a->sound();
37	return 0;
38	}
39