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c++小项目：基于STL的演讲比赛流程管理系统_c++ 演讲比赛代码

作者：小小林熬夜学编程 | 2024-05-21 11:49:14

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c++ 演讲比赛代码

一、项目目的

运用c++实现一个基于STL的演讲比赛流程管理系统。

比赛方式

共两轮，第一轮为分组淘汰赛，第二轮为决赛，共有十名评委，打分方式为去掉最高分和最低分的平均分为基准
第一轮共两组，每组六人，为随机分组和抽签决定演讲顺序，每组取前三名进入下一轮；
第二轮为淘汰赛，六名选手同台竞技，决出冠亚季军；
每轮比赛结束后都会公布胜出选手分数及排名；

程序功能

开始演讲比赛：完成整届比赛的流程，每个比赛阶段需要给用户一个提示，用户按任意键后继续下一个阶段；该阶段还具有初始化比赛进程、抽签、进行比赛、显示晋级成果、保存分数的功能。
查看往届记录：查看往届比赛结冠亚军信息，每次比赛都会记录到文件（格式为csv）中。
清空比赛记录：将文件中往届比赛结冠亚军信息清空。
退出比赛程序：退出当前程序。

二、项目实现

1. 项目雏形

演讲比赛流程管理系统.cpp

#include<iostream>
#include"SpeechManager.h"
#include<ctime>

using namespace std;

int main(){
	srand((unsigned int)time(NULL));
	SpeechManager s1;

	int input;
	while (1){
		s1.Show_menu();
		cout << "            请输入你的选项：            " << endl;
		cin >> input;
		switch (input){
		case 0:
                //退出比赛程序
			s1.Exit_system();
			break;
		case 1:
                //开始演讲比赛
			s1.Start_speech();
			break;
		case 2:
                //查看往届记录
			s1.Show_record();
			break;
		case 3:
                //清空比赛记录
			s1.Clear_record();
			break;
		default:
			system("cls");//清屏
			break;
		}
	}

	system("pause");
	return 0;
}
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该段为项目的雏形，上面也是接下来我们将要实现的功能。

2. 管理类的实现

首先在SpeechManager.h中设计管理类

#pragma once
#include<iostream>

using namespace std;

class SpeechManager
{
public:
	SpeechManager();

	~SpeechManager();
};
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然后在SpeechManager.cpp中将构造和析构函数空实现补全

#include "speechManager.h"

SpeechManager::SpeechManager(){
}

SpeechManager::~SpeechManager(){
}
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3. 实现菜单功能

首先在管理类SpeechManager类中添加成员函数 void show_Menu()
然后在SpeechManager.cpp中实现

void SpeechManager::Show_menu(){
	cout << "                                      " << endl;
	cout << "            欢迎参加演讲比赛!         " << endl;
	cout << "            1.开始演讲比赛            " << endl;
	cout << "            2.查看往届记录            " << endl;
	cout << "            3.清空比赛记录            " << endl;
	cout << "            0.退出比赛程序            " << endl;
	cout << "                                      " << endl;
}
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实现效果：

4. 实现退出功能

首先在在SpeechManager类中添加成员函数 void exitSystem()
然后在SpeechManager.cpp中实现

void SpeechManager::Exit_system(){
	cout << "            欢迎下次使用            " << endl;
	system("pause");
	exit(0);
}
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实现效果：

5. 实现比赛功能

5.1 选手类的实现

在Speaker.h设计选手类

#pragma once;
#include<iostream>
#include<string>

using namespace std;

class Speaker{
public:
	string Name;
	double Score[2];//最多有两轮成绩
};
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5.2添加成员变量

在SpeechManager类中添加成员变量

        int rounds; //比赛轮次
	vector<int>v1; //第一轮参与选手（12位
	vector<int>v2;//晋级第二轮的选手（6位
	vector<int>third;//获得前三名的选手
	map<int, Speaker>speaker;//存放编号以及对应具体选手
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5.3 初始化成员变量

首先在SpeechManager类中添加成员函数 void Init_speaker()
然后在SpeechManager.cpp中实现

void SpeechManager::Init_speaker(){
	//初始化选手数据
	this->v1.clear();
	this->v2.clear();
	this->third.clear();
	this->speaker.clear();

	this->rounds = 1;//初始化比赛轮次
}
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接着在SpeechManager.cpp中的SpeechManager构造函数中调用void Init_speaker()

SpeechManager::SpeechManager(){
	this->Init_speaker();
}
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5.4 创建选手

首先在SpeechManager类中添加成员函数 void Create_speaker()
然后在SpeechManager.cpp中实现

void SpeechManager::Create_speaker(){
	string nameSeed = "ABCDEFGHIJKL";
	for (int i = 0; i < nameSeed.size(); i++){
		string name = "选手";
		name += nameSeed[i];

		Speaker s;
		s.Name = name;
		for (int j = 0; j < 2; j++) s.Score[j] = 0;

		this->v1.push_back(10001 + i);
		this->speaker.insert(make_pair(10001 + i, s));
	}
}
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接着在SpeechManager.cpp中的SpeechManager构造函数中调用void Create_speaker()

SpeechManager::SpeechManager(){
	this->Init_speaker();
	this->Create_speaker();
}
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5.5 比赛功能实现

首先在SpeechManager类中添加成员函数 void Start_speech()
然后在SpeechManager.cpp中实现

void SpeechManager::Start_speech(){
	//第一轮比赛
	//抽签
	this->Drawing();
	//比赛
	this->Completion();
	//显示晋级成果
	this->Show_score();
	//第二轮比赛
	this->rounds++;
	//抽签
	this->Drawing();
	//比赛
	this->Completion();
	//显示最终结果
	this->Show_score();
	//保存分数
	this->Record();
        
        cout << "本届比赛顺利结束" << endl; //这一条与上面的显示会闪烁过去，原因不明
	system("pasue");
	system("cls");
}
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5.5.1 抽签功能实现

首先在SpeechManager类中添加成员函数 void Drawing()
然后在SpeechManager.cpp中实现

void SpeechManager::Drawing(){
	if (this->rounds == 1) cout << "            第一轮比赛选手正在抽签" << endl;
	else cout << "            第二轮比赛选手正在抽签" << endl;
	cout << "-------------------------------------" << endl;
	cout << "            演讲顺序如下" << endl;
	if (this->rounds == 1){
		random_shuffle(v1.begin(), v1.end());
		for (vector<int>::iterator it = v1.begin(); it != v1.end(); it++) cout << *it << " ";
		cout << endl;
	}
	else{
		random_shuffle(v2.begin(), v2.end());
		for (vector<int>::iterator it = v2.begin(); it != v2.end(); it++) cout << *it << " ";
		cout << endl;
	}
	cout << "-------------------------------------" << endl;
	system("pause");
	cout << endl;
}
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实现效果：

5.5.2 比赛功能实现

首先在SpeechManager类中添加成员函数 void Completion()
然后在SpeechManager.cpp中实现

void SpeechManager::Completion(){
	if (this->rounds == 1) cout << "            第一轮比赛正式开始" << endl;
	else cout << "            第二轮比赛正式开始" << endl;

	multimap<double, int, greater<double>>group;//记录每组选手数据
	int num = 0;//6人为一组

	vector<int>v;
	if (this->rounds == 1) v = v1;
	else v = v2;

	for (vector<int>::iterator it = v.begin(); it != v.end(); it++){
		num++;

		deque<double>d;//存放分数
		for (int i = 0; i < 10; i++){
			double score = (rand() % 401 + 600) / 10.f; //600~1000
			d.push_back(score);
		}

		sort(d.begin(), d.end(), greater<double>());
		d.pop_front();//去除最高分
		d.pop_back();//去除最低分

		double sum = accumulate(d.begin(), d.end(), 0.0f);//计算总分
		double avg = sum / (double)d.size();//计算平均分
		this->speaker[*it].Score[this->rounds - 1] = avg;

		group.insert(make_pair(avg, *it));
		//6人一组
		if (num % 6 == 0){
			if (num / 6 == 1) cout << "第一小组比赛名次如下：" << endl;
			else cout << "第二小组比赛名次如下：" << endl;
			for (multimap<double, int, greater<double>>::iterator it = group.begin(); 
                        it != group.end(); it++)
				cout << "编号：" << it->second << " 姓名：" 
                                << this->speaker[it->second].Name
				<< " 成绩：" << this->speaker[it->second].Score[this->rounds - 1] 
                                << endl;

			//取各组前三名
			int count = 0;
			for (multimap<double, int, greater<double>>::iterator it = group.begin(); 
                        it != group.end() && count < 3; it++, count++){
				if (this->rounds == 1) v2.push_back((*it).second);
				else third.push_back((*it).second);
			}

			group.clear();
			cout << endl;
		}
	}
	if (this->rounds == 1) cout << "            第一轮比赛完毕" << endl;
	else cout << "            第二轮比赛完毕" << endl;

	system("pause");
}
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实现效果：

5.5.3 显示功能实现

首先在SpeechManager类中添加成员函数 void Show_score()
然后在SpeechManager.cpp中实现

void SpeechManager::Show_score(){
	if (this->rounds == 1) cout << "            第一轮比赛晋级选手信息如下：" << endl;
	else cout << "            第二轮比赛晋级选手信息如下：" << endl;

	vector<int>v;
	if (this->rounds == 1) v = v2;
	else v = third;

	for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
		cout << "编号：" << *it<< " 姓名：" <<this-> speaker[*it].Name
		<< " 成绩：" << this->speaker[*it].Score[this->rounds - 1] << endl;
    cout << endl;

	system("pause");
	system("cls");
	this->Show_menu();
}
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实现效果：

5.5.4 第二轮比赛实现

第二轮比赛仅需将比赛轮次+1，后续流程与第一轮一样
实现效果：

5.5.5 保存功能实现

首先在SpeechManager类中添加成员函数 void Record()
然后在SpeechManager.cpp中实现

void SpeechManager::Record(){
	ofstream ofs;
	ofs.open("speech.csv", ios::out | ios::app);// 用输出的方式打开文件

        //存入数据
	for (vector<int>::iterator it = third.begin(); it != third.end(); it++)
		ofs << *it << "," << speaker[*it].Score[1] << ",";
	ofs <<endl;

	ofs.close();
	cout << "记录已保存" << endl; //这一条与接下来的显示会闪烁过去，原因不明
}
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利用记事本打开文件speech.csv，里面保存了前三名选手的编号以及得分

6. 实现读取功能

首先在SpeechManager类中添加成员函数和成员变量

        void Load_record();//读取往届记录
        
	bool File_is_empty;//判断文件是否为空
        
	map<int, vector<string>>record;//往届记录
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然后在SpeechManager.cpp中实现

void SpeechManager::Load_record(){
	ifstream ifs("speech.csv", ios::in);

	if (!ifs.is_open()){
		this->File_is_empty = true;
		cout << "文件不存在！" << endl;
		ifs.close();
		return;
	}

	char ch;
	ifs >> ch;
	if (ifs.eof()){
		cout << "文件为空！" << endl;
		this->File_is_empty = true;
		ifs.close();
		return;
	}

	this->File_is_empty = false;

	ifs.putback(ch);//把读取的单个字符放回去

	string data;
	int index = 0;
	while (ifs >> data){
		vector<string>v;

		int pos = -1;
		int start = 0;
		
		while (true){
			pos = data.find(",", start);
			if (pos == -1) break;
			string tmp = data.substr(start, pos - start);
                        //第一个是起始位置，第二个是到逗号的截取长度
			v.push_back(tmp);
			start = pos + 1;
		}
		this->record.insert(make_pair(index, v));
		index++;
	}
	ifs.close();
}
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接着在void Record()利用File_is_empty更新文件状态

//比赛完后文件不为空
	this->File_is_empty = false;
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在SpeechManager.cpp中的SpeechManager构造函数中调用void Record()

SpeechManager::SpeechManager(){
	this->Init_speaker();
	this->Create_speaker();
	this->Load_record();
}
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在SpeechManager.cpp中的void Init_speaker()函数中初始化记录容器

        this->record.clear();
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在SpeechManager.cpp中的void Start_speech()函数中重置比赛

//重置比赛
	this->Init_speaker();
	this->Create_speaker();
	this->Load_record();
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7. 实现查看功能

首先在SpeechManager类中添加成员函数 void Show_record()
然后在SpeechManager.cpp中实现

void SpeechManager::Show_record(){
	if (this->File_is_empty) cout << "文件不存在，或记录为空！" << endl;
	else{
		for (map<int, vector<string>>::iterator it = this->record.begin(); 
                it != this->record.end(); it++){
			cout << "第" << it->first+1 << "届" <<
                                "冠军编号：" << it->second[0] << " 得分：" << it->second[1] << " "
				"亚军编号：" << it->second[2] << " 得分：" << it->second[3] << " "
				"季军编号：" << it->second[4] << " 得分：" << it->second[5] << endl;
		}
	}
        
	system("pause");
	system("cls");
}
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实现效果：

8. 实现清空功能

首先在SpeechManager类中添加成员函数 void Clear_record()
然后在SpeechManager.cpp中实现

void SpeechManager::Clear_record()
{
	cout << "确认清空？" << endl
		<< "1. Yes" << endl
		<< "2. No" << endl;

	int select;
	cin >> select;

	if (select == 1){
		ofstream ofs("speech.csv", ios::trunc);
		ofs.close();

		this->Init_speaker();
		this->Create_speaker();
		this->Load_record();

		cout << "清除成功" << endl;
	}
	else if (select == 2) return;
	else cout << "输入有误！" << endl;

	system("pause");
	system("cls");
}
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实现效果：

至此本项目结束

三、源代码显示

1. 头文件

“Speaker.h”

#pragma once;
#include<iostream>
#include<string>

using namespace std;

class Speaker{
public:
	string Name;
	double Score[2];
};
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“SpeechManage.h”

#pragma once
#include<iostream>
#include<vector>
#include<map>
#include"Speaker.h"
#include<algorithm>
#include<numeric>
#include<functional>
#include<deque>
#include<fstream>

using namespace std;

class SpeechManager{
public:
	SpeechManager();

	void Show_menu();

	void Exit_system();

	void Init_speaker();

	int rounds; 
	vector<int>v1; 
	vector<int>v2;
	vector<int>third;
	map<int, Speaker>speaker;

	void Create_speaker();

	void Start_speech();

	void Drawing();

	void Show_score();

	void Record();

	void Completion();

	void Load_record();

	bool File_is_empty;

	map<int, vector<string>>record;

	void Show_record();

	void Clear_record();

	~SpeechManager();
};
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2. 源文件

“SpeechManage.cpp”

#include "SpeechManager.h"

SpeechManager::SpeechManager(){
	this->Init_speaker();
	this->Create_speaker();
	this->Load_record();
}

SpeechManager::~SpeechManager(){
}

void SpeechManager::Show_menu(){
	cout << "                                      " << endl;
	cout << "            欢迎参加演讲比赛!         " << endl;
	cout << "            1.开始演讲比赛            " << endl;
	cout << "            2.查看往届记录            " << endl;
	cout << "            3.清空比赛记录            " << endl;
	cout << "            0.退出比赛程序            " << endl;
	cout << "                                      " << endl;
}

void SpeechManager::Exit_system(){
	cout << "            欢迎下次使用            " << endl;
	system("pause");
	exit(0);
}

void SpeechManager::Init_speaker(){
	this->v1.clear();
	this->v2.clear();
	this->third.clear();
	this->speaker.clear();
	this->record.clear();

	this->rounds = 1;
}

void SpeechManager::Create_speaker(){
	string nameSeed = "ABCDEFGHIJKL";
	for (int i = 0; i < nameSeed.size(); i++){
		string name = "选手";
		name += nameSeed[i];

		Speaker s;
		s.Name = name;
		for (int j = 0; j < 2; j++) s.Score[j] = 0;

		this->v1.push_back(10001 + i);
		this->speaker.insert(make_pair(10001 + i, s));
	}
}

void SpeechManager::Start_speech(){

	this->Drawing();

	this->Completion();

	this->Show_score();

	this->rounds++;

	this->Drawing();

	this->Completion();

	this->Show_score();

	this->Record();

	this->Init_speaker();
	this->Create_speaker();
	this->Load_record();

	cout << "本届比赛顺利结束" << endl;
	system("pasue");
	system("cls");
}

void SpeechManager::Drawing(){
	if (this->rounds == 1) cout << "            第一轮比赛选手正在抽签" << endl;
	else cout << "            第二轮比赛选手正在抽签" << endl;
	cout << "-------------------------------------" << endl;
	cout << "            演讲顺序如下" << endl;
	if (this->rounds == 1){
		random_shuffle(v1.begin(), v1.end());
		for (vector<int>::iterator it = v1.begin(); it != v1.end(); it++) cout << *it << " ";
		cout << endl;
	}
	else{
		random_shuffle(v2.begin(), v2.end());
		for (vector<int>::iterator it = v2.begin(); it != v2.end(); it++) cout << *it << " ";
		cout << endl;
	}
	cout << "-------------------------------------" << endl;
	system("pause");
	cout << endl;
}

void SpeechManager::Completion(){
	if (this->rounds == 1) cout << "            第一轮比赛正式开始" << endl;
	else cout << "            第二轮比赛正式开始" << endl;

	multimap<double, int, greater<double>>group;
	int num = 0;

	vector<int>v;
	if (this->rounds == 1) v = v1;
	else v = v2;

	for (vector<int>::iterator it = v.begin(); it != v.end(); it++){
		num++;

		deque<double>d;
		for (int i = 0; i < 10; i++){
			double score = (rand() % 401 + 600) / 10.f; 
			d.push_back(score);
		}

		sort(d.begin(), d.end(), greater<double>());
		d.pop_front();
		d.pop_back();

		double sum = accumulate(d.begin(), d.end(), 0.0f);
		double avg = sum / (double)d.size();
		this->speaker[*it].Score[this->rounds - 1] = avg;

		group.insert(make_pair(avg, *it));
		
		if (num % 6 == 0){
			if (num / 6 == 1) cout << "第一小组比赛名次如下：" << endl;
			else cout << "第二小组比赛名次如下：" << endl;
			for (multimap<double, int, greater<double>>::iterator it = group.begin(); it != group.end(); it++)
				cout << "编号：" << it->second << " 姓名：" << this->speaker[it->second].Name
				<< " 成绩：" << this->speaker[it->second].Score[this->rounds - 1] << endl;

			int count = 0;
			for (multimap<double, int, greater<double>>::iterator it = group.begin(); it != group.end() && count < 3; it++, count++){
				if (this->rounds == 1) v2.push_back((*it).second);
				else third.push_back((*it).second);
			}

			group.clear();
			cout << endl;
		}
	}
	if (this->rounds == 1) cout << "            第一轮比赛完毕" << endl;
	else cout << "            第二轮比赛完毕" << endl;

	system("pause");
}

void SpeechManager::Show_score(){
	if (this->rounds == 1) cout << "            第一轮比赛晋级选手信息如下：" << endl;
	else cout << "            第二轮比赛晋级选手信息如下：" << endl;

	vector<int>v;
	if (this->rounds == 1) v = v2;
	else v = third;

	for (vector<int>::iterator it = v.begin(); it != v.end(); it++)
		cout << "编号：" << *it<< " 姓名：" <<this-> speaker[*it].Name
		<< " 成绩：" << this->speaker[*it].Score[this->rounds - 1] << endl;
    cout << endl;

	system("pause");
	system("cls");
	this->Show_menu();
}

void SpeechManager::Record(){
	ofstream ofs;
	ofs.open("speech.csv", ios::out | ios::app);

	for (vector<int>::iterator it = third.begin(); it != third.end(); it++)
		ofs << *it << "," << speaker[*it].Score[1] << ",";
	ofs <<endl;

	ofs.close();
	cout << "记录已保存" << endl;
	this->File_is_empty = false;
}

void SpeechManager::Load_record(){
	ifstream ifs("speech.csv", ios::in);

	if (!ifs.is_open()){
		this->File_is_empty = true;
		cout << "文件不存在！" << endl;
		ifs.close();
		return;
	}

	char ch;
	ifs >> ch;
	if (ifs.eof()){
		cout << "文件为空！" << endl;
		this->File_is_empty = true;
		ifs.close();
		return;
	}

	this->File_is_empty = false;

	ifs.putback(ch);

	string data;
	int index = 0;
	while (ifs >> data){
		vector<string>v;

		int pos = -1;
		int start = 0;
		
		while (true){
			pos = data.find(",", start);
			if (pos == -1) break;
			string tmp = data.substr(start, pos - start);
			v.push_back(tmp);
			start = pos + 1;
		}
		this->record.insert(make_pair(index, v));
		index++;
	}
	ifs.close();
}

void SpeechManager::Show_record(){
	if (this->File_is_empty) cout << "文件不存在，或记录为空！" << endl;
	else{
		for (map<int, vector<string>>::iterator it = this->record.begin(); it != this->record.end(); it++){
			cout << "第" << it->first+1 << "届" <<
				"冠军编号：" << it->second[0] << " 得分：" << it->second[1] << " "
				"亚军编号：" << it->second[2] << " 得分：" << it->second[3] << " "
				"季军编号：" << it->second[4] << " 得分：" << it->second[5] << endl;
		}
	}

	system("pause");
	system("cls");
}

void SpeechManager::Clear_record()
{
	cout << "确认清空？" << endl
		<< "1. Yes" << endl
		<< "2. No" << endl;

	int select;
	cin >> select;

	if (select == 1){
		ofstream ofs("speech.csv", ios::trunc);
		ofs.close();

		this->Init_speaker();
		this->Create_speaker();
		this->Load_record();

		cout << "清除成功" << endl;
	}
	else if (select == 2) return;
	else cout << "输入有误！" << endl;

	system("pause");
	system("cls");
}
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“演讲比赛流程管理系统.cpp”

#include<iostream>
#include"SpeechManager.h"
#include<ctime>

using namespace std;

int main(){
	srand((unsigned int)time(NULL));
	SpeechManager s1;

	int input;
	while (1){
		s1.Show_menu();
		cout << "            请输入你的选项：            " << endl;
		cin >> input;
		switch (input){
		case 0:
			s1.Exit_system();
			break;
		case 1:
			s1.Start_speech();
			break;
		case 2:
			s1.Show_record();
			break;
		case 3:
			s1.Clear_record();
			break;
		default:
			system("cls");
			break;
		}
	}

	system("pause");
	return 0;
}
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