2023.4.24

 

//实验五任务二
#include <iostream>
using namespace std;
class vector3D
{
private:
    float x,y,z;
public:
    vector3D()
    {
        x = 0;
        y = 0;
        z = 0;
    }
    friend ostream& operator <<(ostream &cout,vector3D &temp);
    friend void setValue(vector3D &v);
    vector3D operator+(vector3D &v)
    {
        vector3D temp;
        temp.x = this->x + v.x;
        temp.y = this->y + v.y;
        temp.z = this->z + v.z;
        return temp;
    }
    vector3D operator-(vector3D &v)
    {
        vector3D temp;
        temp.x = this->x - v.x;
        temp.y = this->y - v.y;
        temp.z = this->z - v.z;
        return temp;
    }
    vector3D& operator* (int a)
    {
        this->x =  a*this->x;
        this->y =  a*this->y;
        this->z =  a*this->z;
        return *this;
    }
};
ostream& operator <<(ostream &cout,vector3D &v)
    {
        cout<<"("<<v.x<<","<<v.y<<","<<v.z<<")";
        return cout;
    }
void setValue(vector3D &v)
{
    cin>>v.x;cin>>v.y;cin>>v.z;
}
int main()
{
    vector3D v1;
    vector3D v2;
    int num;
    cin>>num;
    if(num == 1)
    {setValue(v1);}
    else if(num == 2)
    {
        setValue(v1);
        setValue(v2);
    }
    int a;
    cin>>a;
    vector3D v3;
    v3 = v1 + v2;
    cout<<v3<<endl;
    v3 = v1 - v2;
    cout<<v3<<endl;
    v3 = v1*a;
    cout<<v3<<endl;
    return 0;
}