实验三

实验任务5
.hpp
#pragma once
#include<iostream>
#include<string>
#include<iomanip>

using std::string;
using std::cout;
using std::endl;

class Info
{
public:
    Info(string nickname0,string contact0,string city0,int n0);
    void print() const;
    ~Info() = default;
private:
    string nickname;
    string contact;
    string city;
    int n;
};

Info::Info(string nickname0, string contact0, string city0, int n0)
{
    nickname = nickname0;
    contact = contact0;
    city = city0;
    n = n0;
}

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

.cpp

#include"Info.hpp"
#include<string>
#include<iostream>
#include<vector>
#include<iomanip>

using namespace std;

int main()
{
    const int capac = 100;
    vector<Info> audience_info_list;
    cout << "录入信息：" << endl;
    cout << "昵称\t" << "联系方式（邮箱/手机号）\t" << "所在城市\t" << "预定参加人数\t" << endl;
    string yourname, yourcontact, yourcity;
    int yn = 0;
    char choice = 'u';
    int sum = 0;
    while (choice == 'u' && sum < capac && cin >> yourname)
    {
        cin >> yourcontact >> yourcity >> yn;
        Info a(yourname, yourcontact, yourcity, yn);
        audience_info_list.push_back(a);
        sum += yn;
        if (sum > capac)
        {
            sum -= yn;
            audience_info_list.pop_back();
            cout << "对不起，只剩" << capac - sum << "个位置。" << endl;
            cout << "1.输入u，更新（update）预定信息" << endl
                << "2.输入q，退出预定" << endl
                << "你的选择：";
            cin >> choice;
        }
    }
    cout << endl << "截至目前，一共有" << sum << "位听众预定参加。预定听众信息如下：" << endl;
    for (auto &Info:audience_info_list)
        Info.print();
}

实验任务6

.hpp

#pragma once
#include<iostream>

using namespace std;

class Textcoder
{
public:
    Textcoder(string _text);
    string get_citext();
    string get_detext();
private:
    string text;
    void encoder();
    void decoder();
};

Textcoder::Textcoder(string _text) :text{ _text }{}
string Textcoder::get_citext()
{
     encoder();
    return text;
}

string Textcoder::get_detext()
{
    decoder();
    return text;
}

void Textcoder::encoder()
{
    for (int i = 0; i < text.size(); i++)
    {
        if (text[i] >= 'a' && text[i] <= 'u')
        {
            text[i] = text[i] + 5;
        }
        else if (text[i] >= 'v' && text[i] <= 'z')
        {
            text[i] = text[i] - 21;
        }
        else if (text[i] >= 'A' && text[i] <= 'U')
        {
            text[i] = text[i] + 5;
        }
        else if (text[i] >= 'V' && text[i] <= 'Z')
        {
            text[i] = text[i] - 21;
        }
    }
}

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

.cpp

#include "Textcoder.hpp"
#include <iostream>
#include <string>

using namespace std;

void test()
{
    string text, encoded_text, decoded_text;
    cout << "输入英文文本: ";
    
    while (getline(cin, text))
    {
        encoded_text = TextCoder(text).get_ciphertext();  
        cout << "加密后英文文本:\t" << encoded_text << endl;

        decoded_text = TextCoder(encoded_text).get_deciphertext(); 
        cout << "解密后英文文本:\t" << decoded_text << endl;
        cout << "输入英文文本: ";
    }
}
int main()
{
    test();
}