用C++完成数学中向量的封装，其中，用指针和动态申请支持向量长度的改变，使用浅克隆和深克隆复制向量类，比较这两种克隆方式的异同。
类图:
代码：
#include<cmath>
#include<iostream>
using namespace std;
class Vector{
private:
double *array =new double[4];
double length;
public:
Vector(double arr[4])
{
this->array[0] = arr[0];
this->array[1] = arr[1];
this->array[2] = arr[2];
this->array[3] = arr[3];
this->length = sqrt(((arr[0] - arr[1])*(arr[0] - arr[1])) + ((arr[2] - arr[3])*(arr[2] - arr[3])));
}
~Vector()
{
delete[]array;
this->length = 0;
}
Vector* clone()
{
return new Vector(*this);
}
Vector(const Vector& vector)
{
//浅克隆
this->array = vector.array;
this->length = vector.length;
}
void show()
{
cout << "向量长度：" << this->length << endl;
}
};
int main()
{
double s[4] = { 1, 2, 3, 4 };
Vector* v1 = new Vector(s);
Vector* v2 = v1->clone();
v1->show();
v2->show();
return 0;
}