实验二 数组、指针与C++标准库

任务五：

//Info.hpp

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

class Info{
private:
    string nickname;
    string contact;
    string city;
    int n;
public:
    Info(string nickname0 = "*", string contact0 = "*", string city0 = "*", int n0 = 0):
        nickname(nickname0), contact(contact0), city(city0), n(n0) {}
    void 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; 
    }        
}; 

//5.cpp

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

int main(){
    using namespace std;
    
    const int capacity = 100;
    vector<Info> audience_info_list;
    int number = 0;
    
    string nickname, contact, city;
    int n;
    cout << "录入信息：" << endl; 
    cout << "称呼/昵称，联系方式（邮箱/手机号），所在城市，预定人数：" << endl; 
    while(cin >> nickname){
        int flag = 0;
        cin >> contact >> city >> n;
        Info t{nickname, contact, city, n};
        if(number + n > capacity){
            char x;
            cout << "对不起，只剩" << capacity-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 << "您的选择是：" << endl;
            cin >> x;
            switch(x){
                case 'u':
                    flag = 1;
                    break;
                case 'q':
                    flag = 2;
                    break;
                default:
                    flag = 2;
                    cout << "输入错误，已为您退出预定"; 
                    break; 
            }
        }
        if(flag == 2)
            break;
        else if(flag == 0){
            number += n;
            audience_info_list.push_back(t);
        }
    }
    
    cout << "截止目前，一共有" << number << "位听众预定参加。预定观众信息如下：" << endl;
    for(auto it = audience_info_list.begin(); it != audience_info_list.end(); ++it)
        it->print();
}

运行结果：

 任务六：

//TextCoder.hpp

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

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

string TextCoder::encoder(){
    int len = text.length();
    for(int i=0; i<len; i++){
        char x = text[i];
        if((x>='a'&&x<='u')||(x>='A'&&x<='U')){
            text[i] += 5;
        }
        else if((x>='v'&&x<='z')||(x>='V'&&x<='Z')){
            text[i] -= 21;
        }
    }
    return text;
}

string TextCoder::decoder(){
    int len = text.length();
    for(int i=0; i<len; i++){
        char x = text[i];
        if((x>='f'&&x<='z')||(x>='F'&&x<='Z')){
            text[i] -= 5;
        }
        else if((x>='a'&&x<='e')||(x>='A'&&x<='Z')){
            text[i] += 21;
        }
    }
    return text;
}

//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:	" << 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:	" << decoded_text << endl;
        cout << "
输入英文文本: ";
    }
}

运行结果截图：