实验4

Textcoder.hpp

#include<iostream>
#include<string>
using namespace std;
class Textcoder {
public:
    Textcoder(string t);
    string get_ciphertext();
    string get_deciphertext();
private:
    string  text;
    void encoder();
    void decoder();
};
Textcoder::Textcoder(string t) {
    text = t;
}
string Textcoder::get_ciphertext() {
    encoder();
    return text;
}
string Textcoder::get_deciphertext() {
    decoder();
    return text;
}
void Textcoder::encoder() {
    for (auto& t : text) {
        if (t >= 'a' && t <= 'z') {
            t = (t - 'a' + 7) % 26 + 'a';
        }
        if (t >= 'A' && t <= 'Z') {
            t = (t - 'A' + 7) % 26 + 'A';
        }

    }

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

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();
}

 5.hpp

#pragma once
#include<iostream>
#include<string>
#include<vector>
using namespace std;
class Info
{
public:
	Info(string nick, string con, string c, int m);
	void print();
private:
	string nickname, contact, city;
	int n;
};
Info::Info(string nick, string con, string c, int m) {
	nickname = nick;
	contact = con;
	city = c;
	n = m;

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

　　cpp

 #include <iostream>
 #include <string>
 #include <vector>
 #include "info.hpp"
  using namespace std;
int main() {
    int const capacity = 100;
    int s = 0, n, i;
    char m;
    string nickname, contact, city;
    vector<Info>audience_info_list;
    vector<Info>& v = audience_info_list;
    cin >> i;
    while (i) {
        cin >> nickname >> contact >> city >> n;

        
        if (s + n <= capacity)
        {
            Info a(nickname, contact, city, n);
            v.push_back(a);
            s = s + n;
            a.print();
        }

        else {
            cout << "对不起，还剩" << capacity - s << endl;
            cout << "输入u, 更新预定信息" << endl;
            cout << "输入q,退出预定" << endl;
            cout << "你的选择" << endl;
            cin >> m;
            if (m == 'q') {
                break;
            }
            if (m == 'u') {
                continue;
            }
        }
    }
    for (int z = 0;z < v.size();z++) {
        v[i].print();
    }
}