第一次作业

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#include <iostream>
#include <stdlib.h>
#include <Eigen/Dense>
#include <math.h>
using namespace std;
using Eigen::MatrixXd;
MatrixXd extract(char str[])
{
MatrixXd p(1,2);
int u;
int i,j;
char a[10];
for(i=0;i<=49&&str[i]!='(';i++);
for(j=0;j<=49&&str[j]!=',';j++);
for(u=0;u<=10&&i!=j-1;u++)
{
i++;
a[u]=str[i];
}

p(0,0)=atof(a);
for(i=j;i<=49&&str[i]!=')';i++);
for(u=0;u<=10&&j!=i-1;u++)
{
j++;
a[u]=str[j];
}
p(0,1)=atof(a);
return p;
}
int main()
{
char name[20];
int n;
double avg,deg;
float pi=3.14159265;
char str1[20];
char str2[20];
char str3[20];
char str4[15];
char str5[15];
char str6[15];
MatrixXd rot(2,2);
MatrixXd p1(1,2);
MatrixXd p2(1,2);
MatrixXd p3(1,2);
MatrixXd p4(1,2);
cout<<"请输入 ";
cin>>name;
cin>>n;
switch(n)
{
case 1:
{
cin>>str1;
p1=extract(str1);
}
break;
case 2:
{
cin>>str1;
p1=extract(str1);
cout<<"请输入第二个坐标";
cin>>str2;
p2=extract(str2);
}
break;
case 3:
{
cin>>str1;
p1=extract(str1);
cout<<"请输入第二个坐标";
cin>>str2;
p2=extract(str2);
cout<<"请输入第三个坐标";
cin>>str3;
p3=extract(str3);
}
break;
default:cout<<"输入错误";

}
cout<<"请输入操作指令"<<endl;
cin>>str4;
if(str4[0]=='m'&&str4[1]=='o'&&str4[2]=='v'&&str4[3]=='e'&&str4[4]==0)
{
cin>>str5;
cin>>str6;
p4=extract(str6);
if(n==1)
{
p1=p1+p4;
cout<<"("<<p1<<")"<<endl;
}
else if(n==2)
{
p1=p1+p4;
p2=p2+p4;
cout<<"("<<p1<<")"<<"("<<p2<<")"<<endl;
}
else
{
p1=p1+p4;
p2=p2+p4;
p3=p3+p4;
cout<<"("<<p1<<")"<<"("<<p2<<")"<<"("<<p3<<")"<<endl;
}
}
else if(str4[0]=='r'&&str4[1]=='o'&&str4[2]=='t'&&str4[3]=='a'&&str4[4]=='t'&&str4[5]=='e'&&str4[6]==0)
{
cin>>str5;
cin>>avg;
deg=avg/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)
{
p1=p1*rot;
cout<<"("<<p1<<")"<<endl;
}
else if(n==2)
{
p1=p1*rot;
p2=p2*rot;
cout<<"("<<p1<<")"<<"("<<p2<<")"<<endl;
}
else
{
p1=p1*rot;
p2=p2*rot;
p3=p3*rot;
cout<<"("<<p1<<")"<<"("<<p2<<")"<<"("<<p3<<")"<<endl;
}

}
else
{
cout<<"输入出错"<<endl;
}
return 0;
}

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