实验二

五

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

class Info {

public:
    Info (string nina, string con, string ci, int num = 0): nickname(nina), contact(con), city(ci), n(num) {};
    void print();

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

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

#include"info.hpp"
#include<iostream>
#include<iomanip>
#include<vector>
#include<string>
int main()
{
    using namespace std;
    const int capacity = 100;
    string na;
    string co;
    string ci;
    int nu;
    int n=0;
    vector<Info> audience_info_list;
    cout << "录入信息:" <<endl;
    cout << "称呼/昵称，联系方式（邮箱/手机号），所在城市，预定参加人数" << endl; 
    while(cin >> na)
    {
        cin >> co;
        cin >> ci;
        cin >> nu;
        if(n + nu > capacity)
        {
            cout << "对不起,只剩" << capacity - n << "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; 
            char s;
            cin >> s;
            if(s=='u')
            {
                continue;
            }
            else
            {
                break;
            }
        }
        n+=nu;
        audience_info_list.push_back(Info(na, co, ci, nu));
    }
    cout << "截至目前，一共有" << n << "位听众预定参加。预定听众信息如下：" <<endl;
    for(auto it=audience_info_list.begin();it!=audience_info_list.end();++it)
    {
        it -> print();
    } 
}

 六

#include <string>

using namespace std;

class TextCoder
{
    public:
        TextCoder(string s) : text{s} {}
        string encoder();
        string decoder();
    private:
        string text;
};
string TextCoder::encoder()
{
    for(auto &ch : text)
    {
        if(ch >= 'a' && ch <= 'z')
        {
            ch += 5;
            if(ch > 'z')
              ch -= 'z' - 'a';
        }
        else if(ch >= 'A' && ch <= 'Z')
        {
            ch += 5;
            if(ch > 'Z')
              ch -= 'Z' - 'A';
        }
    }
    return text;
}
string TextCoder::decoder()
{
    for(auto &ch : text)
    {
        if(ch >= 'a' && ch <= 'z')
        {
            ch -= 5;
            if(ch < 'a')
              ch += 'z' - 'a';
        }
        else if(ch >= 'A' && ch <= 'Z')
        {
            ch -= 5;
            if(ch > 'Z')
              ch += 'Z' - 'A';
        }
    }
    return text;
}

#include "TextCoder.hpp"
#include <iostream>
#include <string>

int main()
{
    using namespace std;

    string text, encoded_text, decode_text;

    cout << "输入英文文本：";
    while (getline(cin, text))
    {
        encoded_text = TextCoder(text).encoder();// 这里使用的是临时无名对象
        cout << "加密后英文文本：" << encoded_text << endl;

        decode_text = TextCoder(encoded_text).decoder();// 这里使用的是临时无 名对象
        
        cout << "解密后英文文本：" << decode_text << endl;
        cout << "
输入英文文本：";
    }
}