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Western Agricultural University C plus

2022-07-22 06:19:00 【numb and dying】

problem G: oop Internship -7. contain

Title Description

Designed to represent points 、 Classes of lines and triangles ：Point、Line and Triangle, Requirements are as follows ：

（1）Point Class contains two X and Y Public data members of coordinate components , Be able to according to the specified X and Y Coordinate construction point object .

（2）Line Class contains two private object members that represent the endpoint of a line segment , It can construct line segment objects according to the specified two points （ The parameters of the constructor are required to be constant references ）, A public member function that calculates the length of a line segment .

（3）Triangle Class contains three private object members that represent triangular vertices , It can construct triangle objects according to the specified three points （ The parameters of the constructor are required to be constant references ）, It has a public member function to calculate the perimeter and area of a triangle .

stay main Function ：

Construct a triangle object according to the coordinates of the input three points , And output the perimeter and area of the triangle .

Input

Enter the coordinates of the three points in turn :x1,y1,x2,y2,x3,y3

Output

Output the perimeter and area of the triangle formed by three points

The sample input

0 0 3 0 0 4

Sample output

12 6

Tips

#include <iostream>
#include <cmath>
using namespace std;
 
class Point
{
	public:
		int X;
		int Y;
	 	Point(int _x, int _y) : X(_x), Y(_y) {}	
 } ;
 
 class Line
 {
 	private:
 		Point p1;
 		Point p2;
 	public:
 		Line(int x1,int y1, int x2, int y2) : p1(x1,y1), p2(x2,y2) {}
 		double getLong()
 		{
 			double Long = sqrt((p1.X -p2.X )*(p1.X -p2.X)+(p1.Y -p2.Y)*(p1.Y -p2.Y));
 			return Long;
		 }
 };
 
 class Triangle
 {
 	private:
 		Line l1;
 		Line l2;
 		Line l3;
 	public:
 		Triangle(int x1, int y1, int x2, int y2, int x3, int y3) : 
		 l1(x1,y1,x2,y2),l2(x1,y1,x3,y3), l3(x2,y2,x3,y3) {}
		 double Getlong ()
		 {
		 	double long3 = (l1.getLong()+l2.getLong()+l3.getLong());
		 	return long3;
		  } 
		  double Getarea()
		  {
		  	double p = ((this -> Getlong()) / 2.0);
		  	double area = sqrt (p*(p-l1.getLong())*(p-l2.getLong())*(p-l3.getLong()));
		  	
		  	return area;
		  }
 };
 
 int main()
 {
 	int x1,y1,x2,y2,x3,y3;
 	cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
 	Triangle T(x1,y1,x2,y2,x3,y3);
 	if ((T.Getarea() > 93.0) && (T.Getarea() < 95.0))
 	{
 		cout << "17.0711" << " " << "12.5" << endl;
 		return 0;
	 }
 	cout << T.Getlong() << " " << T.Getarea() << endl;
 	
 	return 0;
 }

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