1 //实验五任务二
2 #include <iostream>
3 using namespace std;
4 class vector3D
5 {
6 private:
7 float x,y,z;
8 public:
9 vector3D()
10 {
11 x = 0;
12 y = 0;
13 z = 0;
14 }
15 friend ostream& operator <<(ostream &cout,vector3D &temp);
16 friend void setValue(vector3D &v);
17 vector3D operator+(vector3D &v)
18 {
19 vector3D temp;
20 temp.x = this->x + v.x;
21 temp.y = this->y + v.y;
22 temp.z = this->z + v.z;
23 return temp;
24 }
25 vector3D operator-(vector3D &v)
26 {
27 vector3D temp;
28 temp.x = this->x - v.x;
29 temp.y = this->y - v.y;
30 temp.z = this->z - v.z;
31 return temp;
32 }
33 vector3D& operator* (int a)
34 {
35 this->x = a*this->x;
36 this->y = a*this->y;
37 this->z = a*this->z;
38 return *this;
39 }
40 };
41 ostream& operator <<(ostream &cout,vector3D &v)
42 {
43 cout<<"("<<v.x<<","<<v.y<<","<<v.z<<")";
44 return cout;
45 }
46 void setValue(vector3D &v)
47 {
48 cin>>v.x;cin>>v.y;cin>>v.z;
49 }
50 int main()
51 {
52 vector3D v1;
53 vector3D v2;
54 int num;
55 cin>>num;
56 if(num == 1)
57 {setValue(v1);}
58 else if(num == 2)
59 {
60 setValue(v1);
61 setValue(v2);
62 }
63 int a;
64 cin>>a;
65 vector3D v3;
66 v3 = v1 + v2;
67 cout<<v3<<endl;
68 v3 = v1 - v2;
69 cout<<v3<<endl;
70 v3 = v1*a;
71 cout<<v3<<endl;
72 return 0;
73 }
