实验2 数组、指针与C++标准库

# ifndef INFO_H
# define INFO_H

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

class info {
public:
    info(string a = " ", string b = " ", string c = " ", int d = 0) : nickname(a), contact(b), city(c), n(d) {}
    void print()const {
        cout << "称呼：       " << nickname << endl;
        cout << "联系方式：   " << contact << endl;
        cout << "所在城市：   " << city << endl;
        cout << "预订人数：   " << n << endl;
    }
    void print() {
        cout << "称呼：       " << nickname << endl;
        cout << "联系方式：   " << contact << endl;
        cout << "所在城市：   " << city << endl;
        cout << "预订人数：   " << n << endl;
    }
private:
    string nickname;
    string contact;
    string city;
    int n;
};
# endif

# include "info.hpp"
# include <iostream>
# include <vector>
int main()
{
    using namespace std;
    vector<info>audience_info_list;
    const int capacity = 100;
    string a, b, c;
    int  d;
    //i = 0;
    int k = capacity;
    cout << "录入信息：" << endl << endl;
    cout << "称呼/昵称，联系方式（邮箱/手机号码），所在城市，预定参加人数" << endl;
        while (cin >> a >> b >> c >> d)
        {
            int y = k;
            y -= d;
              string x;
            if (y <0)
            {
                cout << "对不起，只剩下" << capacity << "个位置." << endl;
                cout << "1. 输入u，更新(update)预订信息" << endl;
                cout << "2. 输入q，退出预订" << endl;
                cin >> x;
            }
            else
            {
                audience_info_list.push_back(info(a, b, c, d));
                k -= d;
                continue;
            }
            if (x == "q")
            {
                break;
            }
            else
            {
                continue;
            }
        }
    int n;
    n = 100 - k;
    cout << "截至目前，一共有" << n << "位听众参加，预订听众信息如下：" << endl;
    for (auto const& a : audience_info_list)
        a.print();
    cout << endl;

}

 

 

#ifndef TEXTCODER_H
#define TEXTCODER_H

# include <iostream>
# include <string>
# include <vector>
using namespace std;
class TextCoder {
public:
    TextCoder(string s="******"): text(s){}
    string encoder();
    string decoder();

private:
    string text;
};
string TextCoder::encoder() {
    for (auto &a:text)
    {
        if (a >= 'a' && a <= 'z')
        {
            if (a >= 'a' && a <= 'u')
                a += 5;
            else
                a -= 21;
        }
        else if (a >= 'A' && a <= 'Z')
        {
            if (a >= 'A' && a <= 'U')
                a += 5;
            else
                a -= 21;
        }
    }
    return text;
}
string TextCoder::decoder() {
    for (auto& b:text)
    {
        if (b >= 'a' && b <= 'z')
        {
            if (b >= 'a' && b <= 'e')
                b += 21;
            else
                b -= 5;
        }
        else if (b >= 'A' && b <= 'Z')
        {
            if (b >= 'A' && b <= 'E')
                b += 21;
            else
                b -= 5;
        }
    }
    return text;
}
#endif 

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

int main()
{
    using namespace std;

    string text, encoded_text, decoded_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:\t" << encoded_text << endl;

        decoded_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:\t" << decoded_text << endl;
        cout << "\n输入英文文本: ";
    }
}