实验三

info.h

#pragma once
#include<iostream>
#include<string>
using namespace std;
class info
{
public:
    info(string _nickname, string _contact, string _city, int _n)
    {
        nickname =_nickname;
        contact = _contact;
        city = _city;
        n = _n;
    }
    void print()
    {
        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;
    }
private:
    string nickname;
    string contact;
    string city;
    int n;
};

test.cpp

#include<iostream>
#include<string>
#include<vector>
#include"info.h"
using namespace std;
int main()
{
    const int capacity = 100;
    vector<info> audience_info_list;
    cout << "录入信息：" << endl << endl;
    cout << "昵称        " << "联系方式（邮箱/手机号）      " << "所在城市        " << "预定参加人数" << endl;
    int num = 0,_n,flag=0;
    string _nickname, _contact, _city;
    while (cin >> _nickname >> _contact >> _city >> _n)
    {
        while (_n + num > 100)
        {
            char choice;
            cout << "对不起，只剩" << capacity - num << "个位置" << endl;
            cout << "1. 输入u，更新预定信息" << endl;
            cout << "2.输入q，退出预定" << endl;
            cout << "你的选择：";
            cin >> choice;
            if (choice == 'q')
            {
                flag = 1;
                break;
            }
            else
            {
                cin >> _nickname >> _contact >> _city >> _n;
            }
        }
        if (flag == 1)
            break;
        num += _n;
        info temp(_nickname, _contact, _city, _n);
        audience_info_list.push_back(temp);
    }
    cout << "截至目前，一共有" << num << "位听众预定参加，预定的观众信息如下：" << endl;
    for (auto e : audience_info_list)
    {
        e.print();
    }
    return 0;
}

textcoder.h

#pragma once
#include<iostream>
#include<string>
using namespace std;

class TextCoder
{
public:
    TextCoder(const string& obj = "");
    string get_ciphertext();
    string get_deciphertext();
private:
    void encoder();
    void decoder();
    string text;
};

textcoder.cpp

#include"textcoder.h"

string encode1 = "fghijklmnopqrstuvwxyzabcde";
string encode2 = "FGHIJKLMNOPQRSTUVWXYZABCDE";
string decode1 = "vwxyzabcdefghijklmnopqrstu";
string decode2 = "VWXYZABCDEFGHIJKLMNOPQRSTU";
TextCoder::TextCoder(const string& _text)
{
    text = _text;
}
void TextCoder::encoder()
{
    for (auto& e :text)
    {
        if (e >= 'a' && e <= 'z')
            e = encode1[e - 'a'];
        else if (e >= 'A' && e <= 'Z')
            e = encode2[e - 'A'];
    }
}
void TextCoder::decoder()
{
    for (auto& e : text)
    {
        if (e >= 'a' && e <= 'z')
            e = decode1[e - 'a'];
        else if (e >= 'A' && e <= 'Z')
            e = decode2[e - 'A'];
    }
}
string TextCoder::get_ciphertext()
{
    encoder();
    return text;
}
string TextCoder::get_deciphertext()
{
    decoder();
    return text;
}

text6.cpp

#include <iostream>
#include <string>
#include "textcoder.h"
using namespace std;

extern string encode1;
extern string encode2;
extern string decode1;
extern string decode2;

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();  // 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();
    return 0;
}