Các bác giúp em sửa bài Vector

Các bác giúp em thực hiện phép toán cộng, trừ, nhân, chia bài vector này với ạ.
Chỗ cộng, trừ, nhân, chia bị lỗi

#include <iostream>
#include <math.h>
using namespace std;

class Vector{
	private:
		int n;
		float *a;
	public:
		void Nhapn(){
			cin >> n;
		}
		
		void Init(){
			cout << "Nhap " << n << " so thuc" << endl;
			for(int i=0; i<n; i++){
				cout << "a[" << i << "]: ";
				cin >> a[i];
			}
		}
		
		
		Vector(int n=0){
			a = new float[n];
			for(int i=0; i<n; i++)
				a[i] = 0;
		}
		
		
		Vector(const Vector &v){
				a = new float[n];
				for(int i=0; i<n; i++)
					a[i] = v.a[i];
		}
		
		~Vector(){
			delete a;
		}
		
		
		
		void Show(){
			for(int i=0; i<n; i++)
				cout << a[i] << "	";
			cout << endl;
		}
		
		int DieuKien(Vector &v2){
			if(this->n == v2.n) return 1;
			else return 0;
		}
		
		Vector Add(Vector &v){
			Vector kq;
			for(int i=0; i<this->n; i++)
				kq.a[i] = a[i] + v.a[i];
		
			return kq;
		}
		
		
		Vector Sub(Vector &v){
			Vector kq;
			for(int i=0; i<n; i++)
				kq.a[i] = a[i] - v.a[i];
	
			return kq;
		}
		
		
		float Mult(const Vector &v){
			float S=0;
			for(int i=0; i<n; i++)
				S += a[i] * v.a[i];
	
			return S;
		}
		
		
		Vector Mult(float k){
			Vector kq;
			for(int i=0; i<this->n; i++)
				kq.a[i] = k * a[i];
			
			return kq;
		}
		void Sort(){
			float temp;
			for(int i=0; i<n; i++)
				for(int j=0; j<n; j++){
					if(a[i] < a[j]){
						temp = a[i];
						a[i] = a[j];
						a[j] = temp;
					}
				}
		}
};







int main(){
	Vector v1,v2,v3;
	cout << "Nhap du lieu cho vector1" << endl
		 << "Nhap n = ";
	v1.Nhapn();
	v1.Init();
	cout << "Nhap du lieu cho vector2" << endl
		 << "Nhap n = ";
	v2.Nhapn();
	v2.Init();
	cout << "
-----------------------------
"
		 << "Hai vector vua nhap" << endl;
	cout << "v1:	";
	v1.Show();
	cout << "v2:	";
	v2.Show();
	
	cout << "
-----------------------------
"
		 << "Cong hai vector" << endl;
	if(v1.DieuKien(v2) == 1){
		v3=v1.Add(v2);
		cout << "v1+v2:	";
		v3.Show();
	}
	else cout << "Khong cong duoc" << endl;
	
	
	
	cout << "
-----------------------------
"
		 << "Tru hai vector" << endl;
	if(v1.DieuKien(v2) == 1){
		v3=v1.Sub(v2);
		cout << "v1-v2:	";
		v3.Show();
	}
	else cout << "Khong tru duoc" << endl;
	
	cout << "
-----------------------------
"
		 << "Nhan hai vector" << endl;
	cout << "v1*v2 = " << v1.Mult(v2);
	
	cout << "
-----------------------------
";
	float k;
	cout << "
Nhap so thuc k: ";
	cin >> k;
	cout << "Nhan vector1 voi so thuc k = " << k << endl;
	v3=v1.Mult(k);
	v3.Show();
	
	cout << "
-----------------------------
"
		 << "Sap xep phan tu vector1 tang dan" << endl;
	v1.Sort();
	v1.Show();
	
	
	return 0;
}