实验3 数组、指针与现代C++标准库

task 5 Info.hpp

#include<iostream>
#include<string>
using std::string;
using std::cout;
using std::cin;
using std::endl;

class Info
{
public:
	Info(string ni= "", string co = "", string ci="", int n0=0) :nickname{ni}, contact{co}, city{ci}, n{n0} {};
	void set_nickname(string n1){ nickname=n1; }
	void set_contact(string c1) { contact = c1; }
	void set_city(string c2) { city = c2; }
	void set_n(int n1) { n = n1; }
	void print();
private:
	string nickname;
	string contact;
	string city;
	int n;

};
void Info::print()
{
	cout << endl;
	cout << "用户名为：" << nickname << endl;
	cout << "该用户联系方式为：" << contact << endl;
	cout << "该用户所在城市为：" << city << endl;
	cout << "该用户的参会人数：" << n << endl<<endl;
}

task5.cpp

#include<iostream>
#include<string>
#include<vector>
#include<limits>
#include<iomanip>
#include"Info.hpp"
using namespace std;
int main() {
	cout.setf(std::ios::left);
	const int capacity = 100;
	string a, b, c;
	int n=0, count = 0,i= 0,sum=0;
	vector<Info>audience_info_list(capacity);
	flag:
	cout << "录入信息：" << endl << endl;
	cout << setw(15) << "昵称" << setw(30) << "联系方式（邮箱/手机号）" << setw(20) << "所在城市" << setw(20) << "预定参加人数" << endl;
	while (cin >> a >> b >> c >> n)
	{
		sum += n;
		if (sum <= capacity)
		{
			audience_info_list[count].set_nickname(a);
			audience_info_list[count].set_contact(b);
			audience_info_list[count].set_city(c);
			audience_info_list[count].set_n(n);
			count++;
		}
		else
		{
			sum -= n;
			int other = 0;
			other = 0;
			other = capacity - sum;
			cout << "对不起只剩" << other << "个座位" << endl;
			string choice;
			cout << "1.输入u，更新（update）预定信息。" << endl;
			cout << "2.输入q，退出预定。" << endl;
			cin >> choice;
			cout << "你的选择：" << choice << endl;
			if (choice == "q")
			{
				cout << "已退出预定！";
				return 0;
			}
			else if (choice == "u")
			{
				cout << "重新开始预定：" << endl;
				goto flag;
			}


		}
	}
	cout << "截至目前，一共有" << sum << "位听众预定参加。预定听众信息如下：" << endl;
	while (i < count)
	{
		audience_info_list[i].prtint();
		i++;
	}


}

运行结果如下：

task6 textcoder.hpp

#pragma once
#include<iostream>
#include<string>
using namespace std;
class TextCoder
{
public:
	TextCoder(string c1) :text(c1) {}
	string get_ciphertext();
	string get_deciphertext();
private:
	string text;
	void encoder();
	void decoder();

};
void TextCoder::encoder() {
	int n = text.length();
	for (int i = 0; i < n; i++)
	{
		if (text[i] >= 'a' && text[i] <= 'z')
		{
			if (text[i] + 5 <= 'z')
			{
				text[i] = text[i] + 5;
			}
			else {
				text[i] = text[i] - 21;
			}

		}
		else if (text[i] >= 'A' && text[i] <= 'Z')
		{
			if (text[i] + 5 <= 'Z')
			{
				text[i] = text[i] + 5;
			}
			else {
				text[i] = text[i] - 21;
			}
		}
	}
}
void TextCoder::decoder() {
	int n = text.length();
	for (int i = 0; i < n; i++)
	{
		if (text[i] >= 'a' && text[i] <= 'z')
		{
			if (text[i] - 5 >= 'a')
			{
				text[i] = text[i] - 5;
			}
			else {
				text[i] = text[i] + 21;
			}
		}
		else if (text[i] >= 'A' && text[i] <= 'Z')
		{
			if (text[i] - 5 >= 'A')
			{
				text[i] = text[i] - 5;
			}
			else {
				text[i] = text[i] + 21;
			}
		}
	}
}
string TextCoder::get_ciphertext() {
	encoder();
	return text;
}
string TextCoder::get_deciphertext() {
	decoder();
	return text;
}

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();
}

运行结果截图如下：