k / B62 OOP

exp1.cpp · 265 B · C++ Raw #include <iostream> using namespace std; class Car { public: string name; int speed; void show() { cout << name << " " << speed << endl; } }; int main() { Car c; c.name = "BMW"; c.speed = 120; c.show(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Car
5	{
6	public:
7	string name;
8	int speed;
9	void show()
10	{
11	cout << name << " " << speed << endl;
12	}
13	};
14
15	int main()
16	{
17	Car c;
18	c.name = "BMW";
19	c.speed = 120;
20	c.show();
21	return 0;
22	}
23

exp2.cpp · 396 B · C++ Raw #include <iostream> using namespace std; class Emp { int id; float sal; public: void get(int a, float b) { id = a; sal = b; } void show(); }; void Emp::show() { cout << "ID: " << id << endl; cout << "Salary: " << sal << endl; } int main() { Emp e1, e2; e1.get(1, 5000); e2.get(2, 7000); e1.show(); e2.show(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Emp
5	{
6	int id;
7	float sal;
8	public:
9	void get(int a, float b)
10	{
11	id = a;
12	sal = b;
13	}
14	void show();
15	};
16
17	void Emp::show()
18	{
19	cout << "ID: " << id << endl;
20	cout << "Salary: " << sal << endl;
21	}
22
23	int main()
24	{
25	Emp e1, e2;
26	e1.get(1, 5000);
27	e2.get(2, 7000);
28	e1.show();
29	e2.show();
30	return 0;
31	}
32

exp3.cpp · 423 B · C++ Raw #include <iostream> using namespace std; class Rect { int l, b; public: Rect() { l = 1; b = 1; } Rect(int x, int y) { l = x; b = y; } void area() { cout << "Area: " << l * b << endl; } ~Rect() { cout << "Destructor" << endl; } }; int main() { Rect r1; Rect r2(4, 5); r1.area(); r2.area(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Rect
5	{
6	int l, b;
7	public:
8	Rect()
9	{
10	l = 1;
11	b = 1;
12	}
13	Rect(int x, int y)
14	{
15	l = x;
16	b = y;
17	}
18	void area()
19	{
20	cout << "Area: " << l * b << endl;
21	}
22	~Rect()
23	{
24	cout << "Destructor" << endl;
25	}
26	};
27
28	int main()
29	{
30	Rect r1;
31	Rect r2(4, 5);
32	r1.area();
33	r2.area();
34	return 0;
35	}
36

exp4.cpp · 300 B · C++ Raw #include <iostream> using namespace std; int c = 0; class Test { public: Test() { c++; cout << "Created object " << c << endl; } ~Test() { cout << "Destroyed object " << c << endl; c--; } }; int main() { Test t1, t2, t3; return 0; }

1	#include <iostream>
2	using namespace std;
3
4	int c = 0;
5
6	class Test
7	{
8	public:
9	Test()
10	{
11	c++;
12	cout << "Created object " << c << endl;
13	}
14	~Test()
15	{
16	cout << "Destroyed object " << c << endl;
17	c--;
18	}
19	};
20
21	int main()
22	{
23	Test t1, t2, t3;
24	return 0;
25	}
26

exp5.cpp · 324 B · C++ Raw #include <iostream> using namespace std; void area(int a) { cout << "Square: " << a * a << endl; } void area(int a, int b) { cout << "Rectangle: " << a * b << endl; } void area(float r) { cout << "Circle: " << 3.14 * r * r << endl; } int main() { area(4); area(3, 5); area(2.0f); return 0; }

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

exp7.cpp · 380 B · C++ Raw #include <iostream> using namespace std; class B; class A { int x; public: A() { x = 10; } friend void add(A a, B b); }; class B { int y; public: B() { y = 20; } friend void add(A a, B b); }; void add(A a, B b) { cout << "Sum: " << a.x + b.y << endl; } int main() { A a; B b; add(a, b); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class B;
5
6	class A
7	{
8	int x;
9	public:
10	A()
11	{
12	x = 10;
13	}
14	friend void add(A a, B b);
15	};
16
17	class B
18	{
19	int y;
20	public:
21	B()
22	{
23	y = 20;
24	}
25	friend void add(A a, B b);
26	};
27
28	void add(A a, B b)
29	{
30	cout << "Sum: " << a.x + b.y << endl;
31	}
32
33	int main()
34	{
35	A a;
36	B b;
37	add(a, b);
38	return 0;
39	}
40

exp8.cpp · 383 B · C++ Raw #include <iostream> using namespace std; class Person { public: string name; }; class Marks { public: int m; }; class Student : public Person, public Marks { public: void show() { cout << "Name: " << name << endl; cout << "Marks: " << m << endl; } }; int main() { Student s; s.name = "Ram"; s.m = 85; s.show(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Person
5	{
6	public:
7	string name;
8	};
9
10	class Marks
11	{
12	public:
13	int m;
14	};
15
16	class Student : public Person, public Marks
17	{
18	public:
19	void show()
20	{
21	cout << "Name: " << name << endl;
22	cout << "Marks: " << m << endl;
23	}
24	};
25
26	int main()
27	{
28	Student s;
29	s.name = "Ram";
30	s.m = 85;
31	s.show();
32	return 0;
33	}
34

exp9.cpp · 470 B · C++ Raw #include <iostream> using namespace std; class Shape { public: virtual void draw() { cout << "Shape" << endl; } }; class Circle : public Shape { public: void draw() { cout << "Circle" << endl; } }; class Square : public Shape { public: void draw() { cout << "Square" << endl; } }; int main() { Shape *s; Circle c; Square q; s = &c; s->draw(); s = &q; s->draw(); return 0; }

1	#include <iostream>
2	using namespace std;
3
4	class Shape
5	{
6	public:
7	virtual void draw()
8	{
9	cout << "Shape" << endl;
10	}
11	};
12
13	class Circle : public Shape
14	{
15	public:
16	void draw()
17	{
18	cout << "Circle" << endl;
19	}
20	};
21
22	class Square : public Shape
23	{
24	public:
25	void draw()
26	{
27	cout << "Square" << endl;
28	}
29	};
30
31	int main()
32	{
33	Shape *s;
34	Circle c;
35	Square q;
36	s = &c;
37	s->draw();
38	s = &q;
39	s->draw();
40	return 0;
41	}
42