求C++的完整代码，这里有两道题

Question

 

Answer 1

class Para
{
    private:
        int x1,y1,z1,x2,y2,z2;
    public:
        void SetPt1(int x,int y,int z) {x1=x;y1=y;z1=z;}
        void SetPt2(int x,int y,int z) {x2=x;y2=y;z2=z;}
        double getdis() {return sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2)+(z1-z2)*(z1-z2));}
};

int main()
{
    Para p;
    p.SetPt1(1,1,1);
    p.SetPt2(5,5,5);
    double dis = p.getdis();
    printf("距离为:%lf",dis);
    return 0;
}