AHU-C++第二次实验

题目

分析

定义Interval类

        这中间定义了友元使得Rect类可以调用Interval类的私有元素，坐标因为要返回两个值 ，我采用返回数组，其中我反复修改的部分部分是交集和并集部分，因为其中取最大值，最小值，但是前提条件在a<b，而y的部分则a>b，导致一直返回有问题

class Interval
{
friend class Rect;
public:
	Interval(int x1=0, int x2=0)//构造函数
		:a(x1),
		b(x2)
	{}
	Interval operator()(int x1, int x2) 
	{
		Interval p(x1, x2);
		return p;
		
	}
	int length()
	{
		return b - a;
	}
	int* coordinate()
	{
		int v[2];
		v[0] = a;
		v[1] = b;
		cout << "The coordinate of the Interval is:";
		cout << "(" << a << "," << b << ")" << endl;
		return v;
	}
	Interval Intersection(Interval& i1, Interval& i2)
	{   
		int m = max(i1.a, i2.a);
		int n = min(i1.b, i2.b);
		if (i1.a > i1.b && i2.a > i2.b)
		{
			m = min(i1.a, i2.a);
			n = max(i1.b, i2.b);
		}
		Interval p(m, n);
		cout << "The Intersection of the two Interval is:";
		Print(p);
		return p;

	}
	Interval Union(Interval& i1, Interval& i2)
	{
		int m = min(i1.a, i2.a);
		int n = max(i1.b, i2.b);
		if (i1.a > i1.b && i2.a > i2.b)
		{
			m = max(i1.a, i2.a);
			n = min(i1.b, i2.b);
		}
		Interval p(m, n);
		cout << "The Union of the two Interval is:";
		Print(p);
		return p;


	}
	void Print(Interval& p)
	{
		cout << "(" << p.a << "," << p.b << ")" << endl;
	}
private:
	int a;
	int b;
};

定义Rect类

        Rect类则是调用了Interval中的函数，逻辑上难度不大。

class Rect 
{
public:
	Rect(int x1, int x2, int x3, int x4)
	{
		horizontal.a=x1;
		horizontal.b = x3;
		vertical.a = x2;
		vertical.b = x4;
	}
	Rect(const Rect& R)
	{
		horizontal = R.horizontal;
		vertical = R.vertical;
	}
	int width()
	{
		cout << "The width of the Rect is:" << (horizontal.b - horizontal.a) << endl;
		return horizontal.b - horizontal.a;
	}
	int height()
	{
		cout << "The height of the Rect is:" << (vertical.a - vertical.b) << endl;
		return vertical.a - vertical.b;
	}
	void leftcor()
	{
		Interval p(horizontal.a, vertical.a);
		cout << "The coordinates of the upper left corner is:";
		p.Print(p);
	}
	void rightcor()
	{
		Interval p(horizontal.b, vertical.b);
		cout << "The coordinates of the bottom right corner is:";
		p.Print(p);
	}
	int get_S()
	{
		int S = width() * height();
		cout << "The area of the Rect is:"<<S<<endl;
		return S;
	}
	void empty()
	{
		if (width() == 0 || height() == 0)
			cout << "The rectangle is empty." << endl;	
		else
			cout << "The rectangle is not empty." << endl;
	}
	int Intersection_rectangle(Rect& R1, Rect& R2)
	{
		Interval m = m.Intersection(R1.horizontal, R2.horizontal);
		Interval n = n.Intersection(R1.vertical, R2.vertical);
		int i = (m.b - m.a) * (n.a - n.b);
		cout << "The area of intersecting rectangles is:" <<i<<endl;
		return i;
	}
	int Union_rectangle(Rect& R1, Rect& R2)
	{
		Interval m = m.Union(R1.horizontal, R2.horizontal);
		Interval n = n.Union(R1.vertical, R2.vertical);
		int i = (m.b - m.a) * (n.a - n.b);
		cout << "The area of Union rectangles is:" << i << endl;
		return i;
	}
	void Iou(Rect& R1, Rect& R2)
	{
		double r =double( R1.Intersection_rectangle(R1, R2))/R1.Union_rectangle(R1,R2);
		cout << "The Iou of these two rectangles is:" << r * 100 << "%" << endl;
		cout << "---------------------------------------------------" << endl << endl;
	}
	

private:
	Interval horizontal;
	Interval vertical;

};

展示信息函数

void showRect(Rect& R)
{
	R.leftcor();
	R.rightcor();
	/*R.width();*/
	/*R.height();*/
	R.get_S();
	cout << "---------------------------------------------------" << endl << endl ;

}

运行结果

完整代码

#include <iostream>
#include <vector>
using namespace std;
class Interval
{
friend class Rect;
public:
	Interval(int x1=0, int x2=0)//构造函数
		:a(x1),
		b(x2)
	{}
	Interval operator()(int x1, int x2) 
	{
		Interval p(x1, x2);
		return p;
		
	}
	int length()
	{
		return b - a;
	}
	int* coordinate()
	{
		int v[2];
		v[0] = a;
		v[1] = b;
		cout << "The coordinate of the Interval is:";
		cout << "(" << a << "," << b << ")" << endl;
		return v;
	}
	Interval Intersection(Interval& i1, Interval& i2)
	{   
		int m = max(i1.a, i2.a);
		int n = min(i1.b, i2.b);
		if (i1.a > i1.b && i2.a > i2.b)
		{
			m = min(i1.a, i2.a);
			n = max(i1.b, i2.b);
		}
		Interval p(m, n);
		cout << "The Intersection of the two Interval is:";
		Print(p);
		return p;

	}
	Interval Union(Interval& i1, Interval& i2)
	{
		int m = min(i1.a, i2.a);
		int n = max(i1.b, i2.b);
		if (i1.a > i1.b && i2.a > i2.b)
		{
			m = max(i1.a, i2.a);
			n = min(i1.b, i2.b);
		}
		Interval p(m, n);
		cout << "The Union of the two Interval is:";
		Print(p);
		return p;


	}
	void Print(Interval& p)
	{
		cout << "(" << p.a << "," << p.b << ")" << endl;
	}
private:
	int a;
	int b;
};
class Rect 
{
public:
	Rect(int x1, int x2, int x3, int x4)
	{
		horizontal.a=x1;
		horizontal.b = x3;
		vertical.a = x2;
		vertical.b = x4;
	}
	Rect(const Rect& R)
	{
		horizontal = R.horizontal;
		vertical = R.vertical;
	}
	int width()
	{
		cout << "The width of the Rect is:" << (horizontal.b - horizontal.a) << endl;
		return horizontal.b - horizontal.a;
	}
	int height()
	{
		cout << "The height of the Rect is:" << (vertical.a - vertical.b) << endl;
		return vertical.a - vertical.b;
	}
	void leftcor()
	{
		Interval p(horizontal.a, vertical.a);
		cout << "The coordinates of the upper left corner is:";
		p.Print(p);
	}
	void rightcor()
	{
		Interval p(horizontal.b, vertical.b);
		cout << "The coordinates of the bottom right corner is:";
		p.Print(p);
	}
	int get_S()
	{
		int S = width() * height();
		cout << "The area of the Rect is:"<<S<<endl;
		return S;
	}
	void empty()
	{
		if (width() == 0 || height() == 0)
			cout << "The rectangle is empty." << endl;	
		else
			cout << "The rectangle is not empty." << endl;
	}
	int Intersection_rectangle(Rect& R1, Rect& R2)
	{
		Interval m = m.Intersection(R1.horizontal, R2.horizontal);
		Interval n = n.Intersection(R1.vertical, R2.vertical);
		int i = (m.b - m.a) * (n.a - n.b);
		cout << "The area of intersecting rectangles is:" <<i<<endl;
		return i;
	}
	int Union_rectangle(Rect& R1, Rect& R2)
	{
		Interval m = m.Union(R1.horizontal, R2.horizontal);
		Interval n = n.Union(R1.vertical, R2.vertical);
		int i = (m.b - m.a) * (n.a - n.b);
		cout << "The area of Union rectangles is:" << i << endl;
		return i;
	}
	void Iou(Rect& R1, Rect& R2)
	{
		double r =double( R1.Intersection_rectangle(R1, R2))/R1.Union_rectangle(R1,R2);
		cout << "The Iou of these two rectangles is:" << r * 100 << "%" << endl;
		cout << "---------------------------------------------------" << endl << endl;
	}
	

private:
	Interval horizontal;
	Interval vertical;

};

void showRect(Rect& R)
{
	R.leftcor();
	R.rightcor();
	/*R.width();*/
	/*R.height();*/
	R.get_S();
	cout << "---------------------------------------------------" << endl << endl ;

}
int main()
{
	Rect R1(0, 1, 1, 0);
	Rect R2(0, 3, 5, 0);
	Rect R3(-1, 1, 2, -2);
	cout <<"Sherry" << endl;
	cout << "---------------------------------------------------" << endl << endl ;
	cout << "The following is information about R1:" << endl;
	showRect(R1);
	cout << "The following is information about R2:" << endl;
	showRect(R2);
	cout << "The following is information about R3:" << endl;
	showRect(R3);
	cout << "R1 and R2:"<<endl;
	R1.Iou(R1, R2);
	cout << "R2 and R3:" << endl;
	R1.Iou(R2, R3);
	cout << "R1 and R3:" << endl;
	R1.Iou(R1, R3);
	return 0;
}