实验3 数组，指针与现代c++标准库

 1 #include<iostream>
 2 #include<string>
 3 #include<iomanip>
 4 using namespace std;
 5   class Info
 6   {
 7         private:
 8               string nickname;
 9               string contact;
10               string city;
11               int n;
12         public:
13               Info(string nick=" ",string cont=" ",string cit=" ",int count=0): nickname{nick},contact{cont},city{cit},n{count}
14               {
15                       number+=n;
16               }
17             void back()
18              { 
19                  number -= n; 
20              }
21         void print()  const
22         { 
23              cout<<left<<setw(20)<<"昵称: "<<nickname<<endl; 
24              cout<<left<<setw(20)<<"联系方式: "<<contact<<endl;
25              cout<<left<<setw(20)<<"所在城市: "<<city<<endl;
26              cout<<left<<setw(20)<<"预定参加人数: "<<n<<endl; 
27         }
28         static int number;
29   };
30   
31     int  Info::number =0;

 1 #include<iostream>
 2 #include<string>
 3 #include<vector>
 4 #include"Info.hpp"
 5 #include<iomanip>
 6 using namespace std;
 7  void input(string &nickname,string &contact,string &city,int &n)
 8  {
 9        cin>>nickname;
10        cin>>contact;
11        cin>>city;
12        cin>>n;
13  }
14    int main()
15    {
16            const int capacity=100;
17            vector<Info> audience_info_list{0};
18         string a;
19         cout<<"录入信息： "<<endl;
20             cout<<"   姓名"<<setw(20)<<"联系方式"<<setw(20)<<"  城市"<<setw(20)<<"预定人数"<<endl;
21         while(cin>>a)  //作为每一次最前面的输入，不等于ctrl+z的时候接着输入类成员 
22         {
23             string nickname, contact, city;
24              int n;
25               input(nickname,contact,city,n);
26               Info t(nickname,contact,city,n);
27               audience_info_list.push_back(t);
28               if(Info::number>capacity)
29               {
30                     audience_info_list.back();
31                    t.back();
32                    cout<<"对不起，只剩"<<capacity-Info::number<<"个位置"<<endl;
33                      char select;
34                     cout<<"1. 输入u，更新预定信息"<<endl;
35                     cout<<"2. 输入q，退出预定"<<endl;
36                     cout<<"你的选择是： ";
37                     cin>>select;
38                     if(select=='u')
39                       continue;
40                     else if(select=='q')
41                       break;
42               }
43               
44          }
45          cout<<"截至目前，一共有"<<Info::number<<"名观众参加。 "<<"预定听众信息如下: "<<endl;
46          cout<<endl;
47           for (const auto &u:audience_info_list )
48              {
49                  
50              u.print();
51              cout<<endl;
52              cout<<endl;
53               }
54            return 0; 
55             
56    }
57     

 1 #include<iostream>
 2 #include<vector>
 3 #include<string>
 4 using namespace std;
 5   class TextCoder
 6   {
 7         private:
 8              string text;
 9         public:
10               TextCoder(string t=" "): text{t}
11               {
12               }
13            string encoder()
14            {
15                   string v=text;
16                    int i=0;
17                    for(i=0;i<v.length();i++)
18                    {
19                         if(v[i]>='a'&&v[i]<='z')
20                            {
21                                  if(v[i]+5<='z')
22                                       v[i]=v[i]+5;
23                                    else
24                                       v[i]='a'+v[i]+5-'z';
25                            }
26                     else if(v[i]>='A'&&v[i]<='Z')
27                            {
28                                  if(v[i]+5<='Z')
29                                       v[i]=v[i]+5;
30                                    else
31                                       v[i]='A'+v[i]+5-'Z';
32                            }
33                    }
34                    text=v;
35                    return v;
36            }
37            string coder()
38            {
39                   string v1=text;
40                    int j=0;
41                    for(j=0;j<v1.length();j++)
42                    {
43                         if(v1[j]>='a'&&v1[j]<='z')
44                            {
45                                  if(v1[j]-5>='a')
46                                       v1[j]=v1[j]-5;
47                                    else
48                                       v1[j]='z'-('a'-v1[j]+5);
49                            }
50                     else if(v1[j]>='A'&&v1[j]<='Z')
51                            {
52                                  if(v1[j]-5>='A')
53                                       v1[j]=v1[j]-5;
54                                    else
55                                       v1[j]='Z'-('A'-v1[j]+5);
56                            }
57                    }
58                    text=v1;
59                    return v1;
60            }
61            
62   };