第六周实验报告 任务五

源程序：

//main.cpp
#include<iostream>
#include "class.h"
#include<cmath>

using namespace std;

void main()
{
	CPoint p1, p2, p3;
	
	CTriangle tri(p1, p2, p3);
	
	double b1, b2, b3;
	
	while(1)
	{
		p1.input();
		
		p2.input();
		
		p3.input();
		
		tri.setTriangle(p1, p2, p3);
		
		b1 = tri.geta();
		
		b2 = tri.getb();
		
		b3 = tri.getd();
		
		if((b1 + b2) > b3 && (b2 + b3) && (b1 + b3) > b2)
		{
			break;
		}
		
		else
		{
			cout << "输入三点的坐标无法构成三角形,请重新输入!!!" <<endl;
		}
	}
	
	cout << "三角形的周长为:" << tri.perimeter() << endl;
	
	cout << "三角形的面积为:" << tri.area() << endl;
	
	cout << "该三角形" << (tri.isRightTriangle()?"是":"不是") << "直角三角形" << endl;  
	
	cout << "该三角形" << (tri.isIsoscelesTriangle()?"是":"不是") << "等腰三角形" << endl;  
}

//class.h
class CPoint
{
private:
	
	mutable double x;  // 横坐标
	
	mutable double y;  // 纵坐标
	
public:
	
	CPoint(double xx=0,double yy=0);
	
	double Distance(CPoint p); 
	
	void input();  //以x,y 形式输入坐标点
	
};


class CTriangle
{
public:
	
	CTriangle(CPoint &X,CPoint &Y,CPoint &Z):A(X),B(Y),C(Z){} //给出三点的构造函数
	
	void setTriangle(CPoint &X,CPoint &Y,CPoint &Z);//取三角形三边长度
	
	double perimeter(void);//计算三角形的周长
	
	double area(void);//计算并返回三角形的面积
	
	bool isRightTriangle(); //是否为直角三角形
	
	bool isIsoscelesTriangle(); //是否为等腰三角形
	
	double geta();
	
	double getb();
	
	double getd();
	
	
	
private:
	
	CPoint A,B,C; //三顶点
	
	double a, b, c;
};
//CTriangle.cpp
#include<iostream>
#include "class.h"
#include<cmath>

using namespace std;

void CTriangle::setTriangle(CPoint &X,CPoint &Y,CPoint &Z)//取三角形三边长度
{
	A = X;
	
	B = Y;
	
	C = Z;
	
	a = B.Distance(C);
	
	b = C.Distance(A);
	
	c = A.Distance(B);
}

double CTriangle::geta()
{
	return a;
}


double CTriangle::getb()
{
	return b;
}

double CTriangle::getd()
{
	return c;
}

double CTriangle::perimeter(void)//计算三角形的周长
{
	return a + b + c;
}

double CTriangle::area(void)//计算并返回三角形的面积
{
	double p = (a + b + c) / 2;
	
	return  sqrt(p * (p - a) * (p - b) * (p - c));  
}

bool CTriangle::isRightTriangle()
{
	if(abs(a * a - b * b - c * c) < 1e-6 || abs(b * b - a * a - c * c) < 1e-6 || abs(c * c - a * a - b * b) < 1e-6  )
	{
		return true;
	}
	
	else
	{
		return false;
	}
}

bool CTriangle::isIsoscelesTriangle()
{
	if(abs(a - b) < 1e-6 || abs(a - c) < 1e-6 || abs(b - c) < 1e-6 )
	{
		return true;
	}
	
	else
	{
		return false;
	}
}

CPoint::CPoint(double xx, double yy)
{
	x = xx;
	
	y = yy;
}

double CPoint::Distance(CPoint p) 
{
	return(sqrt((x - p.x) * (x - p.x) + (y - p.y) * (y - p.y)));
}

void CPoint::input()
{
	char z;
	
	while(1)
	{
		cout << "请以 x , y 形式输入坐标点:";

		cin >> x >> z >> y;
		
		if(z == ',')
		{
			break;
		}
		
		else
		{
			cout<< "输入格式有误!!!" << endl;
		}
	}
}

一不小心忘记了这个任务····只能潦草的发一下了····对不住了····贺老····