实验四

task5源代码：

 1 #pragma once
 2 
 3 #include<iostream>
 4 #include<string>
 5 
 6 using namespace std;
 7 
 8 class TextCoder {
 9     public:
10         TextCoder() = default;
11         TextCoder(string str);
12         string get_ciphertext();
13         string get_deciphertext();
14         ~TextCoder() = default;
15     
16     private:
17         string text;
18         void encoder();
19         void decoder();
20 };
21 
22 TextCoder::TextCoder(string str) {
23     text = str;
24 }
25 
26 string TextCoder::get_ciphertext() {
27     encoder();
28     return text;
29 }
30 
31 string TextCoder::get_deciphertext() {
32     decoder();
33     return text;
34 }
35 
36 void TextCoder::encoder() {
37     for(int i = 0;i<text.length();i++) {
38         if(islower(text[i])) {
39             text.replace(i, 1, 1, (text[i] - 'a' + 7) % 26 + 'a');
40         }
41         else if(isupper(text[i])) {
42             text.replace(i, 1, 1, (text[i] - 'A' + 7) % 26 + 'A');
43         }
44     }
45 }
46 
47 void TextCoder::decoder() {
48     for(int i = 0;i<text.length();i++) {
49         if(islower(text[i])) {
50             text.replace(i, 1, 1, (text[i] - 'a' + 26 - 7) % 26 + 'a');
51         }
52         else if(isupper(text[i])) {
53             text.replace(i, 1, 1, (text[i] - 'A' + 26 - 7) % 26 + 'A');
54         }
55     }
56 }

 1 #include<iostream>
 2 #include<string>
 3 #include"TextCoder.hpp"
 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         decoded_text = TextCoder(encoded_text).get_deciphertext(); //这里使用的是临时无名对象
15         cout << "解密后英文文本：\t" << decoded_text << endl;
16         cout << "\n输入英文文本：";
17     }
18 }
19 
20 int main() {
21     test();
22 }

task5运行结果：

task6源代码：

 1 #pragma once
 2 
 3 #include<iostream>
 4 #include<string>
 5 
 6 using namespace std;
 7 
 8 class info {
 9     public:
10         info(string n1, string c, string city1, int n2);
11         void print() {
12             cout << "昵称：\t\t" << nickname << endl;
13             cout << "联系方式：\t" << contact << endl;
14             cout << "所在城市：\t" << city << endl;
15             cout << "预定人数：\t" << n << endl;
16         };
17         
18     private:
19         string nickname;
20         string contact;
21         string city;
22         int n;
23 };
24 
25 info::info(string n1, string c, string city1, int n2): nickname{n1}, contact{c}, city{city1}, n{n2} {}

 1 #include <iostream>
 2 #include <string>
 3 #include <vector>
 4 #include"info.hpp"
 5 
 6 using namespace std;
 7 
 8 void test() {
 9     const int type = 100;
10     vector<info> audience_info_list;
11     vector<info> &v = audience_info_list;
12     int sum = 0;
13 
14     cout << "录入信息：\n\n";
15     cout << "昵称\t\t";
16     cout << "联系方式(邮箱/手机号)\t\t";
17     cout << "所在城市\t";
18     cout << "预定人数" << endl;
19     
20     string nickname, contact, city;
21     int n;
22     
23     while (cin >> nickname >> contact >> city >> n) {
24         if (sum + n <= type) {
25             info a(nickname, contact, city, n);
26             v.push_back(a);
27             sum += n;
28         }
29         else {
30             cout << "对不起，只剩" << type - sum << "个位置。\n";
31             cout << "1.输入u，更新(update)预定信息" << endl;
32             cout << "2.输入q，退出预定" << endl;
33             cout << "你的选择：";
34 
35             char c;
36             cin >> c;
37             if (c == 'q') break;
38             else if (c == 'u') continue;
39             else break;
40         }
41         if (sum == type) break;
42     }
43     cout << endl;
44 
45     cout << "截至目前，一共有" << sum << "位听众预定参加。";
46     if (sum != 0) {
47         cout << "预定听众信息如下：" << endl;
48         for (int i = 0; i < v.size(); i++) {
49             v[i].print();
50             cout << endl;
51         }
52     }
53 }
54 
55 int main() {
56     test();
57 }

task6运行结果：