OOPLab02.cpp

#include <iostream>
#include <math.h>
#include <string>
using namespace std;
class Diem
{
public:
	void Nhap();
	void Xuat();
	float khoangCach(Diem b);
private:
	int x;
	int y;
};
class DuongTron {
private:
	Diem I;
	float r;
public:
	void NhapDuongTron();
	void InDuongTron();
	float chuVi();
	float dienTich();
};
class MangDuongTron {
private:
	DuongTron mangdt[10]; // gia su toi da 10 duong tron
	int n;
public:
	void NhapMangDuongTron();
	void InMangDuongTron();
	DuongTron chuViNhoNhat();
	DuongTron chuViLonNhat();
	DuongTron dienTichNhoNhat();
	DuongTron dienTichLonNhat();
	void SapXepTangTheoChuVi();
	void SapXepGiamTheoDienTich();
};
void Diem::Nhap(){
	cout << "Nhap x : "; cin >> x;
	cout << "Nhap y : "; cin >> y;
}
void Diem::Xuat(){
	cout << "Toa do : " << x << "/" << y << endl;
}
float Diem::khoangCach(Diem b){
	return 1.0*sqrt((x - b.x)*(x - b.x) + (y - b.y)*(y - b.y));
}
void DuongTron::NhapDuongTron() {
	cout << "Nhap tam I : " << endl;
	I.Nhap();
	cout << "Nhap ban kinh r : "; cin >> r;
}
void DuongTron::InDuongTron(){
	cout << "Toa do tam I : " << endl;
	I.Xuat();
	cout << "Ban kinh r : " << r;
}
float DuongTron::chuVi(){
	return 3.14 * 2 * r;
}
float DuongTron::dienTich(){
	return 3.14*r*r;
}
void MangDuongTron::NhapMangDuongTron(){
	cout << "Nhap so duong tron (<10) : "; cin >> n;
	for (int i = 0; i < n; i++) {
		cout << "Nhap duong tron thu " << i << ": ";
		mangdt[i].NhapDuongTron();
	}
}
void MangDuongTron::InMangDuongTron(){
	for (int i = 0; i < n; i++) {
		cout << "Thong tin duong tron thu " << i << ":" << endl;
		mangdt[i].InDuongTron();
	}
}
DuongTron MangDuongTron::chuViLonNhat(){
	float max = mangdt[0].chuVi();
	int maxIndex = 0;
	for (int i = 1; i < n; i++) {
		if (max < mangdt[i].chuVi()) {
			max = mangdt[i].chuVi();
			maxIndex = i;
		}
	}
	return mangdt[maxIndex];
}
DuongTron MangDuongTron::chuViNhoNhat(){
	float min = mangdt[0].chuVi();
	int minIndex = 0;
	for (int i = 1; i < n; i++) {
		if (min > mangdt[i].chuVi()) {
			min = mangdt[i].chuVi();
			minIndex = i;
		}
	}
	return mangdt[minIndex];
}
DuongTron MangDuongTron::dienTichLonNhat(){
	float max = mangdt[0].dienTich();
	int maxIndex = 0;
	for (int i = 1; i < n; i++) {
		if (max < mangdt[i].dienTich()) {
			max = mangdt[i].dienTich();
			maxIndex = i;
		}
	}
	return mangdt[maxIndex];
}
DuongTron MangDuongTron::dienTichNhoNhat(){
	float min = mangdt[0].dienTich();
	int minIndex = 0;
	for (int i = 1; i < n; i++) {
		if (min > mangdt[i].dienTich()) {
			min = mangdt[i].dienTich();
			minIndex = i;
		}
	}
	return mangdt[minIndex];
}
void MangDuongTron::SapXepTangTheoChuVi(){
	for (int i = 0; i < n - 1; i++) {
		for (int j = i; j < n; j++) {
			if (mangdt[i].chuVi() > mangdt[j].chuVi()) {
				DuongTron temp = mangdt[i];
				mangdt[i] = mangdt[j];
				mangdt[j] = temp;
			}
		}
	}
}
void MangDuongTron::SapXepGiamTheoDienTich(){
	for (int i = 0; i < n - 1; i++) {
		for (int j = i; j < n; j++) {
			if (mangdt[i].dienTich() < mangdt[j].dienTich()) {
				DuongTron temp = mangdt[i];
				mangdt[i] = mangdt[j];
				mangdt[j] = temp;
			}
		}
	}
}