第二次作业

#include <iostream>
#include <stdlib.h>
#include <string.h> 
#include <Eigen/Dense>
#include <math.h>
using namespace std;
using namespace Eigen;
using Eigen::MatrixXd;
float pi=3.141592;
RowVector2f move(char str[])
{
    RowVector2f R;
    R(0)=0;
    R(1)=0;
    char a[60],b[60];
    int i,j,k;
    j=0,k=0;
    for(i=1;str[i]!=',';i++)
    {
        R(0)=10*R(0)+str[i]-'0';
        j++;
    }
    i++;
    for(i;str[i]!=')';i++)
    {
        R(1)=10*R(1)+str[i]-'0';
        k++;
    }
    return R;
}
int main()
{
    int n;
    char name[60];
    double ang,deg;
    char T1[60];
    char T2[60];
    char T3[60];
    char T4[60];
    char T5[60];
    RowVector2f R1;
    RowVector2f R2;
    RowVector2f R3;
    RowVector2f R4;
    Matrix2f Rot;
    int C=1;
    while(C!=0)
{
    cout<<"Please input name of graph：";
    cin>>name;
    cout<<"Please input number of points：";
    cin>>n;
    cout<<"Please input the endpoint：";
    if(n==1)
    {
        cin>>T1;
        R1=move(T1);
    }
    else if(n==2)
    {
        cin>>T1;
        cin>>T2;
        R1=move(T1);
        R2=move(T2);
    }
    else if(n==3)
    {
        cin>>T1;
        cin>>T2;
        cin>>T3;
        R1=move(T1);
        R2=move(T2);
        R3=move(T3);
    }
    else 
    {
        cout<<"!Input Error！";
    }
        cout<<"Please input a command：";
        cin>>T4;
        if( strcmp(T4,"Rotate")==0)
    {
        cout<<"Please input angle:";
        cin>>ang;
        deg=ang/180*pi;
        Rot(0,0)=cos(deg);
        Rot(0,1)=sin(deg);
        Rot(1,0)=-sin(deg);
        Rot(1,1)=cos(deg);
        if(n==1)
        {
            R1=R1*Rot;
            cout<<"（"<<R1<<"）"<<endl;
        }
        if(n==2)
        {
            R1=R1*Rot;
            R2=R2*Rot;
            cout<<"（"<<R1<<"）（"<<R2<<"）"<<endl;
        }
        if(n==3)
        {
            R1=R1*Rot;
            R2=R2*Rot;
            R3=R3*Rot;
            cout<<"（"<<R1<<"）（"<<R2<<"）（"<<R3<<"）"<<endl;
        }    
    } 
    if( strcmp(T4,"Move")==0)
    {
        cout<<"Please input the coordinate：";
        cin>>T5;
        R4=move(T5);
        if(n==1)
        {
            R1=R1+R4;
            cout<<"（"<<R1<<"）"<<endl;
        }
        if(n==2)
        {
            R1=R1+R4;
            R2=R2+R4;
            cout<<"（"<<R1<<"）（"<<R2<<"）"<<endl;
        }
        if(n==3)
        {
            R1=R1+R4;
            R2=R2+R4;
            R3=R3+R4;
            cout<<"（"<<R1<<"）（"<<R2<<"）（"<<R3<<"）"<<endl;
        }
    }
}
    
    return 0;
}