四、实验结论

1.实验五

#include <string>
#include <iostream>
#include <vector>

using namespace std;

class Info{
    public:
        Info(string nname,string co,string ct,int nn){
            nickname = nname;
            contact = co;
            city = ct;
            n = nn;
        }
        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;                            
        }
        
    private:
        string nickname;
        string contact;
        string city;
        int n;
};

int main(){
    vector<Info> audience_info_list;
    static int capacity = 100;
    cout << "录入信息：\n\n" ;
    string nickname,contact,city;
    int n;
    cout << "请依次输入预约信息（在称呼中输入stop以中止录入）\n";
    cout << "称呼：";
    cin >> nickname;
    while (nickname!="stop"){
        cout << "联系方式：";
        cin >> contact;
        cout << "所在城市：";
        cin >> city;
        cout << "预定人数：";
        cin >> n;
        if (n>capacity){
            char a;
            cout << "对不起，您的预定参加人数超过livehouse场地剩余容量，请输入q中止预定，或输入u更新预定信息\n";
            cout << "您的选择是：";
            cin >> a;
            if (a=='q')
                break;
            else{
                cout << "\n称呼：";
                cin >> nickname;
                continue;
            }
        }
        Info audience (nickname,contact,city,n);
        capacity = capacity-n;
        audience_info_list.push_back(audience);
        cout << "\n称呼：";
        cin >> nickname;
    }
    cout << "\n预定信息：\n";
    cout << "截止目前，一共有" << 100-capacity << "位听众预定\n"; 
    for (auto a : audience_info_list){
        a.print();
        cout << "\n"; 
    }
    
    return 0;
} 

2.实验六

#ifndef TEXTCODER_HPP
#define TEXTCODER_HPP
#include <string>
#include <vector>

using namespace std;

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

string TextCoder :: encoder(){
    for(auto &ch : text){
        if(ch>='v' && ch<='z' || ch>='V' && ch<='Z'){
            ch = (char)(ch-21);
        }else if(ch>='a' && ch<='u' || ch>='A' && ch<='U'){
            ch = (char)(ch+5);
        }
    }
    return text;
}
string TextCoder :: decoder(){
    for(auto &ch : text){
        if(ch>='a' && ch<='e' || ch>='A' && ch<='E'){
            ch = (char)(ch+21);
        }else if(ch>='f' && ch<='z' || ch>='F' && ch<='Z'){
            ch = (char)(ch-5);
        }
    }
    return text;
}

#endif

#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: ";
    }
}

五、实验总结

1.使用string类时，似乎必须在全局配置中添加 using namespace std??

2.范围for和自动类型推导真好使