20_6_7 1

define_class.h

#pragma once
#ifndef DEFINE_ClASS_H
#define DEFINE_CLASS_H
#include<iostream>
#include<cmath>
using namespace std;
//定义坐标点类
class Point {
private:
double X, Y;
public:
Point(double = 0.0, double = 0.0);
Point(Point&);
void Display() {
cout << X << "," << Y<< endl;
}
double Distance(Point&);
double getX() {
return X;
}
double getY() {
return Y;
}
};

class Line {
private:
Point a, b;//线段类的两个端点
public:
Line(Point&, Point&);
void Display();
Line(Line&);
double Distance();//两点间距离
};
#endif // !DEFINE_ClASS_H

 

function.h

#pragma once
#ifndef FUNCTION_H
#define FUNCTION_H
//#include<iostream>
//#include<cmath>
#include"define_class.h"
//using namespace std;
Point::Point(double a, double b) {
X = a;
Y = b;
}
Point::Point(Point &a) {
X = a.X;
Y = a.Y;
}
double Point::Distance(Point& a) {
double dis;
dis = sqrt((X - a.X) * (X - a.X) + (Y - a.Y) * (Y - a.Y));
return dis;
}

Line::Line(Point &a1,Point &a2):a(a1),b(a2){}//给Line的私有变量初始化

void Line::Display() {
a.Display();
b.Display();
}

Line::Line(Line& m) {
a = m.a;
b = m.b;
}
double Line::Distance() {
double x, y;
x = a.getX() - b.getX();
y = a.getY() - b.getY();
return sqrt(x * x + y * y);
}
#endif

 

main.cpp

#include <iostream>
#include<cmath>
#include"funtion.h"
using namespace std;

int main(void) {
Point a;
Point b(8.9, 9.8), c(34.4, 67.8);
a = c;//调用复制构造函数
a.Display();
b.Display();
cout << "两点之间距离:" << a.Distance(b) << endl;
Line s(a, b);
Line s1(s);
cout << "线段的长度:" << s1.Distance() << endl;
system("pause");
return 0;
}