实验三

实验任务5：

task5.hpp:

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

class Info{
public:
	Info(string name, string con, string city, int people) :nickname{ name }, contact{ con }, city{ city }, n{ people }{}
	void print();

private:
	string nickname;
	string contact;
	string city;
	int n;

};

void Info::print() {
	cout << "昵称：\t  \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;
}

　task5.cpp:

　　

#include <iostream>
#include <vector>
#include <string>
#include "Info.h"

void test() {
	using namespace std;
	
	const int capacity = 100;
	string name, con, city;
	int n,count= 0;
	vector<Info> audience_info_list;

	cout << "录入信息：" << endl;
	cout << "昵称\t" << "联系方式（邮箱/手机号）\t\t" << "所在城市\t" << "预定参加人数\t" << endl;

	while (cin>>name) {
		cin >> con >> city >> n;
		count += n;

		if (capacity - count >= 0) {
			Info p0 = Info(name, con, city, n);
			audience_info_list.push_back(p0);

		}
		else{
			string next;
			count -= n;
			cout << "对不起，只剩" << (capacity - count) << "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 << "你的选择：";
			cin >> next;
			if (next == "q")
				break;
			else if (next == "u") {
				cout << "录入信息：" << endl;
				continue;
			}
		}
		
		if (count == capacity)
			break;

	}
	
	cout << "截至目前，一共有" << count << "位听众参加预定。预定信息如下：" << endl;

	for (int i = 0; i < audience_info_list.size(); i++) {
		audience_info_list.at(i).print();
		cout << endl;
	}

}

int main() {
	test();
}

　　

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实验任务6：

task6.hpp：

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

class TextCoder {
private:
	string text;
	void encoder();
	void decoder();
public:
	TextCoder();
	TextCoder(string t0) :text{t0}{}
	string get_ciphertext();
	string get_deciphertext();
};

TextCoder::TextCoder(){}

void TextCoder::encoder(){

	int len = text.length();
	for (int i = 0; i < len; i++) {
		if (text.at(i) >= 'a' && text.at(i) <= 'u') {
			text.at(i) += 5;
		}
		else if (text.at(i) >= 'v' && text.at(i) <= 'z') {
			text.at(i) -= 21;
		}
		else if (text.at(i) >= 'A' && text.at(i) <= 'U') {
			text.at(i) += 5;
		}
		else if (text.at(i) >= 'V' && text.at(i) <= 'Z') {
			text.at(i) -= 21;
		}
	}

}

void TextCoder::decoder() {
	int len = text.length();
	for (int i = 0; i < len; i++) {
		if (text.at(i) >= 'f' && text.at(i) <= 'z') {
			text.at(i) -= 5;
		}
		else if (text.at(i) >= 'a' && text.at(i) <= 'e') {
			text.at(i) += 21;
		}
		else if (text.at(i) >= 'F' && text.at(i) <= 'Z') {
			text.at(i) -= 5;
		}
		else if (text.at(i) >= 'A' && text.at(i) <= 'E') {
			text.at(i) += 21;
		}
	}
}

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

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

　　task6.cpp：

#include<iostream>
#include "TextCoder.h"
#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();
}

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