实验3 数组、指针与现代C++标准库

实验5

#pragma once

#include<iostream>
#include<string>
#include<iomanip>

using namespace std;

class info {
public:
    info(string nickname0,string contact0,string city0,int n0):
        nickname{nickname0},contact{contact0},city{city0},n{n0} {}
    void print();

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

void info::print() {
    cout << left << setw(15) << "昵称："<<nickname<< endl;
    cout << left << setw(15) << "联系方式：" << contact << endl;
    cout << left << setw(15) << "所在城市：" << city << endl;
    cout << left << setw(15) << "预定人数：" << n << endl;
    cout << endl;
}

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

using namespace std;
using namespace std;

int main()
{
    const int capacity = 100;
    int number = 0;
    string nickname, contact, city;
    int n;
    cout << "录入信息：" << endl<< endl;
    cout << left << setw(15) << "昵称" << setw(30) << "联系方式（邮箱/手机号）"
        << setw(15) << "所在城市" << setw(15) << "预定参加人数" << endl;
    vector<info> audience_info_list;
    while (cin>>nickname&&number<=100) {
        cin >> contact >> city >> n;
        info p = info(nickname, contact, city, n);
        audience_info_list.push_back(p);
        number += n;
        if (number > 100) {
            audience_info_list.pop_back();
            number = number - n;
            cout << "对不起，只剩"<<number<<"个位置." << endl;
            cout << "1.输入u,更新(update)预定信息" << endl;
            cout << "2.输入q,退出预定" << endl;
            cout << "你的选择：";
            string choice;
            cin >> choice;
            if (choice == "q") {
                break;
            }
        }
    }
    cout << "截至目前,一共有" << number << "位听众预定参加。预定听众信息如下：" << endl;
    for (auto i = 0; i < audience_info_list.size(); i++) {
        audience_info_list[i].print();
    }
}

实验6

#pragma once

#include<iostream>
#include<string>

using namespace std;

class TextCoder {
private:
    string text;
private:
    void encoder(string &s)
    {
        for (auto &item:s)
        {
            if (isalpha(item)) {
                item += 5;
                if (item > 'z' || item > 'Z' && item < 'a') {
                    item -= 26;
                }
            }
        }
    }
    void decoder(string& s) {
        for (auto& item : s)
        {
            if (isalpha(item)) {
                item -= 5;
                if (item < 'A' || item > 'Z' && item < 'a') {
                    item += 26;
                }
            }
        }
    }
public:
    TextCoder(string text0):text{text0}{}
    string get_ciphertext();
    string get_deciphertext();
};

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

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

#include "textcoder.h"
#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();  
        cout << "加密后英文文本:\t" << encoded_text << endl;

        decoded_text = TextCoder(encoded_text).get_deciphertext(); 
        cout << "解密后英文文本:\t" << decoded_text << endl;
        cout << "\n输入英文文本: ";
    }
}

int main() {
    test();
}