实验3

task5

#include<iostream>
using namespace std;
#include<iomanip>

class Info {
private:
    string nickname, contact, city;
    int n;
public:
    Info(string a,string b,string c,int d):nickname(a),contact(b),city(c),n(d){}
    ~Info() = default;
    void Info_()const;
};

void Info::Info_()const {
    cout << left << setw(9) << "昵称：" << nickname << endl;
    cout << left << setw(9) << "联系方式：" << contact << endl;
    cout << left << setw(9) << "所在城市：" << city << endl;
    cout << left << setw(9) << "预定人数：" << n << endl;
    cout << endl;
}

#include"Info.hpp"
#include<iostream>
#include<iomanip>
#include<vector>
using namespace std;

const int capacity = 100;

int main() {
    vector<Info> audience_info_list;
    string a, b, c;
    static int count = 0;
    int m;
    char qu;
    cout << "录入信息：\n\n" << "昵称   " << "联系方式（邮箱/手机号）   " <<
        "所在城市       " << "预定参加人数" << endl;

    while (cin >>a) {
        cin >> b >> c >> m;
        if (count + m < capacity)
        {
            Info audience(a, b, c, m);
            audience_info_list.push_back(audience);
            count += m;
            if (m == capacity)
                break;
        }

    else
        {
        int left = capacity - count;
        cout << "对不起，只剩" << left << "个位置。" << 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 << "你的选择：";
        cin >> qu;
        if (qu == 'q')
        {
            cout << endl; break;
        }
        else continue;
        }
}
cout << "截至目前，一共有" << count << "位听众预定参与。预定听众信息如下：" << endl;
for (auto item : audience_info_list)
{
    item.Info_();
}

}

task6

#include<iostream>
#include<string>

using namespace std;
class TextCoder {
public:
    TextCoder(string text);
    ~TextCoder() = default;

    string get_ciphertext();
    string get_deciphertext();

private:
    string text;
    void encoder();
    void decoder();
};

TextCoder::TextCoder(string a) :text(a) {}

void TextCoder::encoder() {
        for (int i = 0; i < text.size(); i++) {
           if ((text[i] >= 'a' && text[i] <= 'z') || (text[i] >= 'A' && text[i] <= 'Z')) {
                     text[i] += 5;
                    if (text[i] > 'z' || (text[i] > 'Z' && text[i] < 'a'))
                             text[i] -= 26;
         
        }
   
    }
}

void TextCoder::decoder()
{
    for (int i = 0; i < text.length(); i++)
    {
        if ((text[i] >= 'a' && text[i] <= 'z') || (text[i] >= 'A' && text[i] <= 'Z')) {
            text[i] -= 5;
            if (text[i] < 'A' || (text[i] > 'Z' && text[i] < 'a'))
                text[i] += 26;
        }
    }
}
string TextCoder::get_ciphertext() {
    encoder();
    return text;
}

string TextCoder::get_deciphertext() {
    decoder();
    return text;
}

#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();
}