第一次编程

 1 #include <iostream>
 2 #include <stdlib.h>
 3 #include <Eigen/Dense>
 4 #include <math.h>
 5 /* run this program using the console pauser or add your own getch, system("pause") or input loop */
 6 using namespace std;
 7 using namespace Eigen; 
 8 
 9 void find(char *strr,Vector2d &pt)
10 {
11     int i=1,j=0;
12     char s1[5],s2[5];
13     for(;i<10&&strr[i]!=',';i++)
14     {
15         s1[j]=strr[i];
16         pt[0]=atof(s1);j++;
17     }
18     i++;
19     for(j=0;i<20&&strr[i]!=')';i++)
20     {
21         s2[j]=strr[i];
22         pt[1]=atof(s2);j++;    
23     }
24 }
25 void tt(int n1,Vector2d &pt1,Vector2d &pt2,Vector2d &pt3)
26 {
27         char str1[20],str2[20],str3[20];
28         switch(n1){
29             case 3: {
30                 cin>>str3;
31                 find(str3,pt3);
32             }
33             case 2: {
34                 cin>>str2;
35                 find(str2,pt2);
36             }    
37             case 1: {
38                 cin>>str1;
39                 find(str1,pt1);
40                 break;
41         }
42             default:cout<<"输入错误"<<endl;
43         }
44                         
45 }
46 
47 
48 int main(int argc, char** argv) {
49     char name[60],trans[20],name1[60],str[20],s[20];
50     int n;
51     double deg;
52     Vector2d move,v1,v2,v3;
53     MatrixXd rot(2,2);
54 
55     cout<<"请输入 ";
56     cin>>name;
57     cin>>n;
58     tt(n,v1,v2,v3);
59     cout<<"请输入操作指令"<<endl;
60     cin>>trans;
61     cin>>name1;
62     if(trans[0]=='m'&&trans[1]=='o'&&trans[2]=='v'&&trans[3]=='e'&&trans[4]==0)
63     {
64         cin>>str;
65         find(str,move);
66         switch(n)
67         {
68         case 3:v3+=move;cout<<"("<<v3[0]<<","<<v3[1]<<")"<<endl;
69         case 2:v2+=move;cout<<"("<<v2[0]<<","<<v2[1]<<")"<<endl;
70         case 1:v1+=move;cout<<"("<<v1[0]<<","<<v1[1]<<")"<<endl;break;
71         default: cout<<"输入出错"<<endl;
72          
73         }
74     }
75     else if(trans[0]=='r'&&trans[1]=='o'&&trans[2]=='t'&&trans[3]=='a'&&trans[4]=='t'&&trans[5]=='e'&&trans[6]==0)
76     {
77         cin>>deg;
78         deg=deg*3.14/180;
79         rot(0,0)=cos(deg);
80         rot(0,1)=-sin(deg);
81         rot(1,0)=sin(deg);
82         rot(1,1)=cos(deg);
83         
84          switch(n)
85         {
86         case 3:v3=v3.transpose()*rot;cout<<"("<<v3[0]<<","<<v3[1]<<")"<<endl;
87         case 2:v2=v2.transpose()*rot;cout<<"("<<v2[0]<<","<<v2[1]<<")"<<endl;
88         case 1:v1=v1.transpose()*rot;cout<<"("<<v1[0]<<","<<v1[1]<<")"<<endl;break;
89         default: cout<<"输入出错"<<endl;  
90         }  
91     }  
92     return 0;
93 }

code

1.进行move平移指令

2.进行rotate旋转指令

小结：本次编程参照了张杭峰同学和杨春琦同学的编程思维。http://www.cnblogs.com/silentteen/p/5007509.html

该程序即为对二维数组的加减运算以及旋转矩阵运算。难点在于对数组、坐标格式的读取，以及分类讨论分类处理上。

解决措施：编写find函数进行字符串至数字的转化，利用tt函数，switch，case，break功能进行点数的分类讨论，分别赋值。