实验4 现代C++标准库与类模板

#program once
#include<iostream>
#include<string>

using namespace std;

class TextCoder{
private:
    string text;
    void encoder();
    void decoder();
public:
    TextCoder(string &str);
    string get_ciphertext();
    string get_deciphertext();
    
};

TextCoder::TextCoder(string &str){
    text=str;
}

string TextCoder::get_ciphertext() {
    encoder();
    return text;
}

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

void TextCoder::encoder(){
    for(auto &i : text){
        if (i >= 'a' && i <= 'z')
            i = 'a' + ((i -'a')+7) % 26;
       else if (i >= 'A' && i <= 'Z')
                i = 'A' + ((i -'A')+7) % 26;
   }
}
void TextCoder::decoder() {
     for (auto &i : text) {
         if (i >= 'a' && i <= 'z')
             i = 'a' + ((i -'a') + 26-7) % 26;
         else if (i >= 'A' && i <= 'Z')
                  i = 'A' + ((i -'A') + 26-7) % 26;
    }
}

#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(); 
        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 << "\n输入英文文本: ";
    }
}

int main() {  
    test(); 
}

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

using namespace std;

class Info {
private:
    string nickname;
    string contact;
    string city;
    int n;

public:
    Info(const string &nickname, const string &contact, const string &city, int n);
    void print() const;
};

Info::Info(const string &nick, const string &con, const string &ci, int nn): nickname{nick}, contact{con}, city{ci}, n{nn} {}

void Info::print() const {
    cout << left << setw(15) <<  "昵称: " << nickname << endl;
    cout << left << setw(15) <<  "联系方式: " << contact << endl;
    cout << left << setw(15) <<  "所在城市: " << city << endl;
    cout << left << setw(15) << "指定人数: " << n << endl;
}

#include "info.hpp"
#include <iostream>
#include <string>
#include <vector>


using namespace std;

const int capacity = 100;

int main (){

    vector<Info> audience_info_list;
    string nick,con,ci;
    int nn;
    static int x =0;
    cout << "录入信息：\n\n";
    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 >> nick)
    {
        cin >> con >> ci >> nn;
        if (x + nn <= capacity) {
            Info tmp(nick, con, ci, nn);
            audience_info_list.push_back(tmp);
            x += nn;
            if (x == capacity)
                break;
        }
        else
        {
            char option;
            cout << "对不起，只剩" << capacity - x << "个位置." << endl
                 << "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：" << endl;
            cin >> option;
            if (option == 'u')
            {
                cout << "请重新输入：" << endl;
            }
            if (option == 'q')
            {
                cout << endl;
                break;
            }
        }
    }

cout << "\n截至目前，一共有" << x << "位听众预定参加。预定听众信息如下：" << endl;
for (const auto& list : audience_info_list)
    list.print(); 
    return 0;
}