实验3 数组，指针与现代C++标准库

task5

//Info.hpp

#include<iostream>
#include<math.h>
#include<string>

using namespace std;

class Info{
    
public: 

    Info (string a, string b, string c, int nn)
        : nickname{a}, contact{b}, city{c}, n{nn} { cnt += nn; }
    
    void print(){
        cout << "昵称: " << nickname << endl
            << "联系方式: " << contact << endl
            << "所在城市: " << city << endl
            << "预定人数: " << n << endl << endl;    
    }
    
    
    static int getcnt() {
        return cnt;
    }
    
    static const int capacity; 

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

int Info::cnt = 0;
const int Info::capacity = 100;

//task5.cpp

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

using namespace std;

vector<Info> livehouse;

int main(){
    
    cout << "录入信息：" << endl;
    cout << setw(15) << left << "昵称";
    cout << setw(15) << left << "联系方式(邮箱/手机号)";
    cout << setw(15) << left << "所在城市";    
    cout << setw(15) << left << "预定参加人数";
    cout << endl;
    string nickname, contact, city;
    int n; 
    
    while(cin >> nickname){    
        cin >> contact >> city >> n;
        bool in = true;
        
        while(n + Info::getcnt() > Info::capacity) {
            cout << "对不起，只剩" << Info::capacity - Info::getcnt() << "个位置" << endl;
            cout << "1.输入u，更新(updata)预订信息" << endl;
            cout << "2.输入q，退出预定" << endl;
            cout << "你的选择：";
            
            char op;
            cin >> op;
            
            if(op == 'q'){
                in = false;
                break;
            }
            else{
                cout << "更新预定人数：" ;
                cin >> n;
            }
        }
        
        
        
        if(in){
            livehouse.push_back(Info(nickname, contact, city, n));
            cout << "预定成功 ~ " << endl;
        }
                
    }
            
    cout << "截止目前，一共有" << Info::getcnt() << "位听众预定参加。预定听众信息如下：" << endl;
    for(auto &now : livehouse)
        now.print();

    return 0;
}

测试结果1：

测试结果2:

更换测试数据的结果：

task6

//TextCoder.hpp

#include<bits/stdc++.h>

using namespace std;

class TextCoder{
    
public:
    
    TextCoder(string a = "") : text{a} {}
    
    string get_ciphertext(){
        encoder();
        return text;
    }
    
    string get_deciphertext(){
        decoder();
        return text;
    }
    
private:
    
    string text;
    
    void encoder(int w = 5){
        for(auto &ch : text){
            char Aa;
            if('a' <= ch && ch <= 'z') Aa = 'a';
            else if('A' <= ch && ch <= 'Z') Aa = 'A';
            else continue;
            ch = Aa + (ch - Aa + w + 52) % 26;
        }
    }
    
    void decoder(){
        encoder(-5);
    }
};

//task6.cpp

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

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 << "加密后的英文文本：" << encoded_text << endl;
        
        decoded_text = TextCoder(encoded_text).get_deciphertext();
        cout << "解密后的英文文本：" << decoded_text << endl << endl;
        cout << "输入英文文本：";
    }
}

int main(){
    
    test();
}

测试结果：

 跟换测试数据的结果：