实验三

实验任务5
info部分：

#include<iostream>
#include<string>
#include<iomanip>

using namespace std;
class info {
public:
    info(string nick, string cont, string ci, int m) :nickname{ nick }, contact{ cont }, city{ ci }, n{ m } {};
    void print();
private:
    string nickname,contact,city;
    int n = 0;
};

void info::print() {
    cout << "昵称：" << setw(7) << nickname << endl;
    cout << "联系方式:" << setw(7) << contact << endl;
    cout << "所在城市：" << setw(7) << city << endl;
    cout << "预定人数：" << setw(7) << n << endl;
    cout << endl;
}

task5:
#include "info.hpp"
#include <iostream>
#include<vector>
#include<iomanip>

int main() {
    const int capacity = 100;
    vector<info>audience_info_list ;
    string nickname, contact, city;
     int sum_people = 0,yuding=0;
     char choice;
     cout << "录入信息：" << endl;
     cout << "昵称" << "     联系方式(邮箱/手机号)" <<"     所在城市" <<"     预定参加人数" << endl;
     while (cin >> nickname)
     {
         cin >> contact >> city >> yuding;
         sum_people +=yuding;
         if (sum_people > capacity)
         {
             cout << "对不起，只剩下:" << capacity - (sum_people - yuding) << "个位置了." << endl;;
             cout << "1.输入u,更新（update）预定信息." << endl;
             cout << "2.输入q,退出预定." << endl;
             cout << "你做出的选择是:" ;
             cin >> choice;
             if (choice == 'u')
                 {
                 sum_people -= yuding;
                   continue;
                  }
             else if (choice == 'q')
                 break;
         }
         
         info x(nickname,contact,city,yuding);
         audience_info_list.push_back(x);
     }
     if(sum_people>capacity)
            cout << "截至目前，一共有" << sum_people-yuding << "位听众预定参加，预定听众信息如下:" << endl;
     else
            cout << "截至目前，一共有" << sum_people << "位听众预定参加，预定听众信息如下:" << endl;
     for (auto i = 0; i < audience_info_list.size(); ++i)
         audience_info_list[i].print();
}

#include<iostream>
#include<string>

using namespace std;
class TextCoder {
public:
    TextCoder(string text1) :text{ text1 } {}
    string get_ciphertext() { encoder(); return text; }
    string get_deciphertext() { decoder(); return text; }
private:
    string text;
    void encoder() {
        for (int i = 0; i < text.size(); i++)
        {
            if (text[i] >= 'a' && text[i] <= 'u')
                text[i] += 5;
            else if (text[i] > 'u' && text[i] <= 'z')
                text[i] -= 21;
            if (text[i] >= 'A' && text[i] <= 'U')
                text[i] += 5;
            else if (text[i] > 'U' && text[i] <= 'Z')
                text[i] -= 21;

        }
    }
    void decoder()
    {
        for (int i = 0; i < text.size(); i++)
        {
            if (text[i] >= 'f' && text[i] <= 'z')
                text[i] -= 5;
            else if (text[i] < 'f' && text[i] >= 'a')
                text[i] += 21;
            if (text[i] >= 'F' && text[i] <= 'Z')
                text[i] -= 5;
            else if (text[i] < 'F' && text[i] >= 'A')
                text[i] += 21;
        }
    }
};

上面的代码是textcoder.hpp

task6:
#include "textcoder.hpp"
#include <iostream>
#include <string>

void test() {
    using namespace std;

    string text, encoded_text, decoded_text;

    cout << "输入英文文本: ";
    while (getline(cin, text)) {
        encoded_text = TextCoder(text).get_ciphertext();  // 这里使用的是临时无名对象
        cout << "加密后英文文本:\t" << encoded_text << endl;

        decoded_text = TextCoder(encoded_text).get_deciphertext(); // 这里使用的是临时无名对象
        cout << "解密后英文文本:\t" << decoded_text << endl;
        cout << "\n输入英文文本: ";
    }
}

int main() {
    test();
}

更改数据后：