C++每日一题（1）

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

class Line
{
    
    
public:
	void setLength(double);
	double getLength(void);
	Line();//这是构造函数声明
	~Line();//这是析构函数声明
private:
	double length;
};

//成员函数定义，包括构造函数
	void Line::setLength(double Len) {
    
    
		length = Len;
}
	double Line::getLength(void)
	{
    
    
		return length;
	}
	Line::Line(void)
	{
    
    
		cout << "Object is being created" << endl;
	}
	Line::~Line(void)
	{
    
    
		cout << "Object is being deleted" << endl;
	}
	//程序的主函数
int main()
{
    
    
	Line line;
	//设置长度
	line.setLength(6.0);
	cout << "Length of line:" << line.getLength() << endl;
	return 0;
}