线段的平移和旋转

//github不会用，试了很久不知道怎么上传代码

#include <iostream>
using namespace std;
#include <stdlib.h>
#include <Eigen/Dense>
#include <math.h>
using namespace std;
using Eigen::MatrixXd;
int main()
{
int option;
struct point {
double px;
double py;
};
struct point p1;
struct point p2;
cout<<"请输入线段的起点"<<endl;
cin>>p1.px;
cin>>p1.py;
cout<<"请输入线段的终点"<<endl;
cin>>p2.px;
cin>>p2.py;
cout<<"请输入线段的操作"<<endl<<"move:0"<<endl<<"rotation:1"<<endl;
cin>>option;
switch(option)
{
case 0:{
double transp[2];

cout<<"请输入平移向量"<<endl;
cin>>transp[0];
cin>>transp[1];
p1.px+=transp[0];
p1.py+=transp[1];
p2.px+=transp[0];
p2.py+=transp[1];
cout<<"平移的结果"<<endl;
cout<<"("<<p1.px<<","<<p1.py<<")"<<"("<<p2.px<<","<<p2.py<<")"<<endl;
break;
}

case 1:{
MatrixXd m(2,2);
double alfa;
cout<<"请输入旋转角度(0~360)"<<endl;
cin>>alfa;
double pi=3.141592654;
alfa=alfa/180*pi;
m(0,0)=cos(alfa);
m(0,1)=sin(alfa);
m(1,0)=-sin(alfa);
m(1,1)=cos(alfa);
double temp1=p1.px*m(0,0)+p1.py*m(1,0);
double temp2=p1.px*m(0,1)+p1.py*m(1,1);
double temp3=p2.px*m(0,0)+p2.py*m(1,0);
double temp4=p2.px*m(0,1)+p2.py*m(1,1);
p1.px=temp1;
p1.py=temp2;
p2.px=temp3;
p2.px=temp4;
cout<<"旋转的结果"<<endl;
cout<<"("<<p1.px<<","<<p1.py<<")"<<"("<<p2.px<<","<<p2.py<<")"<<endl;
}
}
return 0;
}