实验3 数组、指针与现代C++标准库

任务五

info.hpp

 1 #pragma once
 2 #include<iostream>
 3 #include<string>
 4 #include<iomanip>
 5 using namespace std;
 6 class info
 7 {
 8     public:
 9         info(string nn="a",string con="a",string ci="a",int num=0):nickname{nn},contact{con},city{ci},n{num}{}
10         void print() const;
11     private:
12         string nickname,contact,city;
13         int n;
14 };
15 void info::print() const{
16         cout << "昵称: \t\t" << nickname << endl;
17         cout << "联系方式：\t" << contact << endl;
18         cout << "所在城市\t" << city << endl;
19         cout << "预定人数\t" << n << endl;
20 }

task5.cpp

 1 #include<iostream>
 2 #include<string>
 3 #include<vector>
 4 #include"info.hpp"
 5 #include<iomanip>
 6 using namespace std;
 7 int main(){
 8     const int capacity=100;
 9     string nn,con,ci;
10     int num,count=0;
11     vector <info> audience_info_list;
12     cout << "录入信息" << endl;
13     cout  << "昵称\t\t" << "联系方式（邮箱/手机号)\t\t" <<  "所在城市\t" << "预定参加人数\t" << endl;
14     while(cin >> nn){
15         cin >> con >> ci;
16         cin >> num;
17         count=count+num;
18 
19     if(capacity > count){
20         info a=info(nn,con,ci,num);
21         audience_info_list.push_back(a);    
22     }
23     else{
24         count=count-num;
25         cout << "对不起，只剩" << (capacity - count) << "个位置." << endl;
26         cout << "1.输入u，更新（update）预定信息" << endl;
27         cout << "2.输入q，退出预定" << endl;
28         cout << "你的选择：";
29         string n;
30         cin >> n;
31         if(n=="q"){
32             break; 
33         }
34         else if(n=="u"){
35             cout << "录入信息：" ;
36             continue;
37         }
38     }
39     
40 }
41     cout << "截至目前，一共有" << count << "位听众参加预定。预定信息如下：" << endl;
42     for (int i = 0; i < audience_info_list.size(); i++) {
43         audience_info_list.at(i).print();
44         cout << endl;
45     }
46 }

任务六

textcoder.hpp

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

task6.cpp

 1 #include "textcoder.hpp"
 2 #include <iostream>
 3 #include <string>
 4 
 5 void test() {
 6     using namespace std;
 7 
 8     string text, encoded_text, decoded_text;
 9 
10     cout << "输入英文文本: ";
11     while (getline(cin, text)) {
12         encoded_text = TextCoder(text).get_ciphertext();  // 这里使用的是临时无名对象
13         cout << "加密后英文文本:\t" << encoded_text << endl;
14 
15         decoded_text = TextCoder(encoded_text).get_deciphertext(); // 这里使用的是临时无名对象
16         cout << "解密后英文文本:\t" << decoded_text << endl;
17         cout << "\n输入英文文本: ";
18     }
19 }
20 
21 int main() {  
22     test(); 
23 }

实验总结：cpp中包含了字符串和各种类的丰富用法。灵活使用这些用法可以帮助我们解决许多复杂的问题。