实验2 数组、指针与C++标准库

实验任务5:

Info.hpp

#ifndef INFO_HPP
#define INFO_HPP

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

using namespace std;

class Info{
    public:
        Info(string nickname_, string contact_, string city_, int n_):
            nickname(nickname_), contact(contact_), city(city_), n(n_){}
        void print() const;
    private:
        string nickname;
        string contact;
        string city;
        int n;
};

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

#endif 

task5.cpp

#include "Info.hpp"
#include<iostream>
#include<vector> 

int main(){

    using namespace std;

    vector<Info> audience_info_list;
    string nickname;
    string contact;
    string city;
    int n;
    int total = 0;
    cout << "录入信息:" << endl;
    cout << 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;
    const int capacity = 100;
    while(cin>>nickname>>contact>>city>>n){
        total += n;
        if(total>capacity){
            cout << "对不起, 只剩" << capacity-(total-n) << "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: ";
            total -= n;
            char flag;
            cin >> flag;
            if(flag == 'u'){
                continue;
            }
            else if(flag == 'q'){
                break;
            }
        }
        Info info(nickname, contact, city, n);
        audience_info_list.push_back(info);
        if(total == 100){
            break;
        }
    }
    cout<<endl;
    cout << "截至目前,一共有" << total << "位听众预定参加.预定听众信息如下:" << endl;
    for(vector<Info>::iterator it = audience_info_list.begin(); it != audience_info_list.end(); it++)
        it->print();
}

运行测试结果:

实验任务6:

textcoder.hpp

#ifndef TEXTCODER
#define TEXTCODER

#include<iostream>
#include<string>

using namespace std;

class TextCoder{
    public:
        TextCoder(string text_):text(text_){}
        string encoder();
        string decoder();

    private:
        string text;
};

string TextCoder::encoder(){
    for(string::iterator it = text.begin(); it!=text.end(); it++){
        if (*it >= 118&&*it<=122)
            *it -= 21;
        else if (*it >= 86 && *it <= 90)
            *it -= 21;
        else if((*it>=97&&*it<=117)||(*it>=65&&*it<=85))
            *it += 5;
    }
    return text;
}

string TextCoder::decoder()
{
    string::iterator it = text.begin();
    for (;it != text.end();it++)
    {
        if (*it <= 69&&*it>=65)
            *it += 21;
        else if (*it >= 97 && *it <= 101)
            *it += 21;
        else if((*it>=70&&*it<=90)||(*it>=102&&*it<=122))
            *it -= 5;
    }
    return text;
}

#endif

task6.cpp

#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: ";
    }
}

运行测试结果: