实验三

info.hpp
#pragma once
#include<iostream>
#include<string>

using namespace std;

class Info {
public:
    Info(string nn, string cont, string ct,int x);
    void print();

private:
    string nickname;
    string contact;
    string city;
    int n;
};

Info::Info(string nn, string cont, string ct, int x) :nickname{ nn }, contact{ cont }, city{ ct }, n{ x } {}
void Info::print() {
    cout << setw(16) << "昵称：" << nickname << endl
        << setw(16) << "联系方式：" << contact << endl
        << setw(16) << "所在城市：" << city << endl
        << setw(16) << "预定人数：" << n << endl<<endl;
}
task.5cpp

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<iomanip>
#include<limits>
#include"info.hpp"
#define MAX 100;

using namespace std;

int main() {
    const int capacity = MAX;
    vector<Info> audience_info_list;
    string nn,cont,ct; //具体信息
    int num=0,sum=0;

    //录入信息
    cout << "录入信息：\n\n";
    cout << left
        << setw(16) << "昵称"
        << setw(30) << "联系方式(邮箱/手机号)"
        << setw(16) << "所在城市"
        << setw(12) << "预定参加人数"
        << endl;
    while (cin>>nn>>cont>>ct>>num) { //每输入一组信息，就尝试放到Info类数组中
        sum += num;
        if (sum > capacity) {
            cout << "对不起，只剩" << capacity-sum + num << "个位置.\n";
            sum -= num;
            cout << "1.输入u，更新(update)预定信息\n2.输入q，退出预定\n你的选择：";
            char choice;
            cin >> choice;
            if (choice == 'u') {
                cout << "请输入更新预定信息：\n";
                continue;
            }
            else if (choice == 'q')
                break;
        }
        else
            audience_info_list.push_back( Info (nn, cont, ct, num));
    }
    //打印信息
    cout <<endl<< "截至目前，一共有" << sum << "位听众参加。预定听众信息如下：\n";
    for (auto& item : audience_info_list)
        item.print();
}

texthoder.hpp

#pragma once
#include<iostream>
#include<string>

using namespace std;

class TextCoder {
public:
    TextCoder(string t);
    string get_ciphertext();
    string get_deciphertext();

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

TextCoder::TextCoder(string t) :text{ t } {}
string TextCoder::get_ciphertext() {
    encoder();
    return text;
}
string TextCoder::get_deciphertext() {
    decoder();
    return text;
}
string text;
void TextCoder::encoder() {
    for (int i = 0; i < text.size(); ++i) {
        if ((text.at(i) >= 'a' && text.at(i) <= 'u') || (text.at(i) >= 'A' && text.at(i)<='U'))
            text.at(i) += 5;
        else if ((text.at(i) >= 'v' && text.at(i) <= 'z') || (text.at(i) >= 'V' && text.at(i) <= 'Z'))
            text.at(i) -= 21;
    }
}
void TextCoder::decoder(){
    for (int i = 0; i < text.size(); ++i) {
        if ((text.at(i) >= 'f' && text.at(i) <= 'z') || (text.at(i) >= 'F' && text.at(i) <= 'Z'))
            text.at(i) -= 5;
        else if ((text.at(i) >= 'a' && text.at(i) <= 'e') || (text.at(i) >= 'A' && text.at(i) <= 'E'))
            text.at(i) += 21;
    }
}

task6.cpp

#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();  // 使用临时无名对象
        cout << "加密后英文文本：" << encoded_text << endl;

        decoded_text = TextCoder(encoded_text).get_deciphertext(); // 使用临时无名对象
        cout << "解密后英文文本：" << decoded_text << endl;
        cout << "输入英文文本：";
    }
}

int main() {
    test();
}