实验三

实验3数组、指针与现代c++标准库

一、task5

1.源代码：

(1)Info.cpp

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

using namespace std;
class info {
public:
    info(string nickname0, string contact0, string city0, int m) :nickname{ nickname0 }, contact{ contact0 }, city{ city0 }, n{ m } {}
    void print();
private:
    string nickname,contact,city;
    int n = 0;
};

void info::print() {
    cout << "昵称：" <<"\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;
    cout << endl;
}

(2)task5.cpp

#include "info.cpp"
#include <iostream>
#include<vector>
#include<iomanip>

int main() {
    const int capacity = 100;
    vector<info>audience_info_list ;
    string nickname, contact, city;
     int sum_people = 0,n=0;
     char flag1;
     cout << "录入信息：" << endl;
     cout << "昵称" << "     联系方式(邮箱/手机号)" <<"     所在城市" <<"     预定参加人数" << endl;
     while (cin >> nickname)
     {
         cin >> contact >> city >> n;
         sum_people +=n;
         if (sum_people > capacity)
         {
             cout << "对不起，只剩下:" << capacity - (sum_people - n) << "个位置了." << 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 << "你做出的选择是:" ;
             cin >> flag1;
             if (flag1 == 'u')
                 {
                 sum_people -= n;
                   continue;
                  }
             else if (flag1 == 'q')
                 break;
         }
         
         info x(nickname,contact,city,n);
         audience_info_list.push_back(x);
     }
     if(sum_people>capacity)
            cout << "截至目前，一共有" << sum_people-n << "位听众预定参加，预定听众信息如下:" << endl;
     else
            cout << "截至目前，一共有" << sum_people << "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();
}

2.运行结果：

二、task6

1.源代码

(1)textcoder.hpp

#pragma once
#include<iostream>
#include<string>
using namespace std;

class TextCoder{
public:
TextCoder(string text0):text{ text0}{}
~TextCoder()=default;
string get_ciphertext();
string get_deciphertext();

private:
string text;
void encoder();
void decoder();

};
void TextCoder::encoder(){
for(auto &i:text){
if(i>='a'&&i<='z')
{
if(i<='u')i=i+5;
else i='a'+i-'u';
}
else if(i>='A'&&i<='Z')
{
if(i<'U')i=i+5;
else i='A'+i-'u';
}}}

void TextCoder::decoder(){
for(auto &i:text){
if(i>='a'&&i<='z')
{
if(i>='f')i=i-5;
else i='u'+i-'a';
}
else if(i>='A'&&i<='Z')
{
if(i>='F')i=i-5;
else i='U'+i-'A';
}}}

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

(2)task6.cpp

#include"textcoder.hpp"
#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();  // 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).get_deciphertext(); // 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: ";
    }
}

int main() {  
    test(); 
}

2.运行结果