实验4 现代C++标准库与类模板

实验任务5

TextCoder.hpp

#pragma once

#include <iostream>
#include <string>

using namespace std;

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

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;
    }
}

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

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

TextCoder::TextCoder(string &s): text{s} {
}

task5.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();  // 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(); 
}

运行测试结果

实验任务6

info.hpp

#pragma once

#include <iostream>
#include <string>

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, const int& n);
        void print() const;
};

Info::Info(const string& nickname, const string& contact, const string& city, const int& n): nickname{nickname}, contact{contact}, city{city}, n{n} {    
}

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

task6.cpp

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

using namespace std;

int main() {
    const int capacity = 100;
    
    int reserved = 0;
    string nickname, contact, city;
    int n;
    
    vector<Info> audience_info_list;
    vector<Info> &v = audience_info_list;
    
    cout << "录入信息：\n";
    cout << "昵称\t\t";
    cout << "联系方式(邮箱/手机号)\t\t";
    cout << "所在城市\t";
    cout << "预定人数" << endl;
    
    while(cin >> nickname >> contact >> city >> n)
    {
        if(reserved + n <= capacity)
        {
            Info in(nickname, contact, city, n);
            v.push_back(in);
            reserved += n;
        }
        else
        {
            cout << "对不起,只剩" << capacity - reserved << "个位置.\n";
            cout << "1.输入u，更新(updata)预定信息" << endl;
            cout << "2.输入q，退出预定" << endl;
            cout << "你的选择：";
            
            char c;
            cin >> c;
            if(c == 'q') break;
            else if(c == 'u') continue;
            else break; 
        }
        if (reserved == capacity) break;
    }
    cout << endl;
    
    cout << "截至目前,一共有" << reserved << "位听众预定参加.";
    if(reserved != 0)
    {
        cout << "预定听众信息如下：" << endl;
        for (auto i = 0; i < v.size(); i++)
        {
            v[i].print();
            cout << endl;
        }
    }
}

运行测试结果