实验四

任务五

textcoder.hpp

#include <iostream>
#include <vector>
#include <string>
#include <iomanip>
using namespace std;
class TextCoder
{
private:
    string text;
    void encoder(string &a)
    {
        for (int i = 0; i < a.length(); i++)
        {
            if (a[i] >= 65 && a[i] <= 90)
            {
                a[i] = 65 + (a[i] - 65 + 7) % 26;
            }
            else if (a[i] >= 97 && a[i] <= 122)
            {
                a[i] = 97 + (a[i] - 97 + 7) % 26;
            }
        }
    }
    void docedor(string &b)
    {
        for (int i = 0; i < b.length(); i++)
        {
            if (b[i] >= 65 && b[i] <= 90)
            {
                b[i] = 90 - (90 - b[i] + 7) % 26;
            }
            else if (b[i] >= 97 && b[i] <= 122)
            {
                b[i] = 122 - (122 - b[i] + 7) % 26;
            }
        }
    }
public:
    TextCoder(string text) :text{ text } {}
    ~TextCoder() {}
    string get_ciphertext();//调用私有成员encoder()加密text中的文本
    string get_deciphertext();//调用私有成员decoder()解密text中的文本
};
string TextCoder::get_ciphertext()
{
    string a=text;
    encoder(a);
    return a;
}
string TextCoder::get_deciphertext()
{
    string b = text;
    docedor(b);
    return b;
}

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(); 
}

 

任务六

task6.cpp

#include<iostream>
#include<string>
#include<vector>
#include"info.hpp" 
int main()
{
    string a, b, c; int d,sum=0;
    int const capacitd = 100;
    vector<Info> x;
    cout << "录入信息:" << endl<<endl;
    cout << "昵称\t    " << "联系方式(邮箱/手机号)\t    " << "所在城市\t    " << "预定参加人数\t" << endl;
    for ( sum ;;)
    {
        cin >> a >> b>> c >> d;
        Info z(a, b, c, d);
        int y = sum; 
        if (sum+d > capacitd)
        {
            cout << "对不起，只剩" << capacitd - y << "个位置" << endl;
            cout << "1.输入u，更新（update）预定信息" << endl;
            cout << "2.输入o，退出（out）预定" << endl; char s;
            cout << "您的选择："; cin >> s;
            if (s == 'u')    continue; cout << endl;
            break;
        }
        else
        {
            sum += d;
            x.push_back(z);
        }
    }
    cout << "截至目前，一共有" << sum << "听众预定参加。预定听众信息如下。" << endl;
    for (int i = 0; i < x.size(); i++)
    {
        x[i].print();
    }
}

info.hpp

#include<iostream>
#include<string>
#include<vector>
using namespace std;
class Info
{
public:
    Info(string name, string contact, string city, int n);
    void print();
private:
    string name, contact, city;
    int n;
};
Info::Info(string name, string contact, string city, int n)
{
    this->name = name; this->contact = contact; this->city = city; this->n = n;
}
void Info::print()
{
    cout << "昵称:        " << name << endl;
    cout << "联系方式:    " << contact << endl;
    cout << "所在城市:    " << city << endl;
    cout<<"预定人数:    " << n << endl;
}