[C++知识库]2021-09-09 C++提升学习案例--演讲管理系统

总的这个案例还是比较复杂，优点难以理解的

当然写多了也就习惯了

speaker.h

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

//选手类
class Speaker
{
public:

	string m_Name;		//	姓名
	double m_Score[2];	//分数 最多有两轮得分
};

speechManager.h

#pragma once
#include <iostream>
#include <vector>
#include <map>
#include "speaker.h"
#include <algorithm>
#include <deque>
#include <functional>
#include <numeric>
#include <ctime>
#include <string>
#include <fstream>
using namespace std;

//设计演讲比赛的管理类
class SpeechManager
{
public:

	SpeechManager();
	~SpeechManager();
	//菜单功能
	void Show_Menu();

	//退出系统
	void exitSystem();

	//初始化容器和属性
	void initSpeech();

	//创建12名选手
	void creatSpeaker();

	//开始比赛
	void startSpeech();

	//抽签函数
	void speechDraw();

	//比赛函数
	void speechContest();

	//显示得分
	void showScore();

	//保存分数
	void saveRecord();

	//查看记录
	void loadRecord();

	//判断文件是否为空
	bool fileIsEmpty;

	//存放往届记录
	map<int, vector<string>>m_Record;

	//显示往届记录
	void showRecord();

	//清空记录
	void clearRecord();
	//成员属性
	//保存第一轮选手编号
	vector<int>v1;

	//第一轮晋级选手编号容器
	vector<int>v2;

	//胜出前三名选手编号容器
	vector<int>vVictory;

	//存放编号以及对应具体选手容器
	map<int, Speaker>m_Speaker;

	//存放比赛轮数
	int m_Index=1;

	
};

speechManager.cpp

#include "speechManager.h"

SpeechManager::SpeechManager()
{
	//初始化容器
	this->initSpeech();

	//创建12名选手
	this->creatSpeaker();

}
//菜单功能
void SpeechManager::Show_Menu()
{
	cout << "******************************************" << endl;
	cout << "*************    欢迎参加比赛 ************" << 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;
	cout << endl;
}

//退出系统
void SpeechManager::exitSystem()
{
	cout << "欢迎下次使用" << endl;
	system("pause");
	exit(0);
}

void SpeechManager::initSpeech()
{
	//容器置空
	this->v1.clear();
	this->v2.clear();
	this->vVictory.clear();
	this->m_Speaker.clear();

	//初始化比赛轮数
	this->m_Index = 1;

	//将记录的容器也清空
	this->m_Record.clear();
}

//创建12名选手
void SpeechManager::creatSpeaker()
{
	string nameSeed = "ABCDEFGHIJKL";
	for (int i = 0; i < nameSeed.size(); i++)
	{
		string name = "选手";
		name += nameSeed[i];

		Speaker sp;
		sp.m_Name = name;

		for (int j = 0; j < 2; j++)
		{
			sp.m_Score[j] = 0;
		}
		//创建选手编号并且放在V1中
		this->v1.push_back(i + 10001);

		//选手编号以及对应选手 放到map容器中
		this->m_Speaker.insert(make_pair(i + 10001, sp));
	}
}
//开始比赛
void SpeechManager::startSpeech()
{
	//第一轮开始

	//1、抽签
	this->speechDraw();
	//2、比赛
	this->speechContest();
	//3、显示最终结果
	this->showScore();
	//第二轮
	this->m_Index++;
	//1、抽签
	this->speechDraw();
	//2、比赛
	this->speechContest();
	//3、显示最后结果
	this->showScore();
	//4、保存分数到文件夹内
	this->saveRecord();

	//重置比赛，获取记录
	//初始化容器和属性
	this->initSpeech();

	//创建12名选手
	this->creatSpeaker();

	//加载往届记录
	this->loadRecord();

	cout << "本届比赛已完毕" << endl;
	system("pause");
	system("cls");
}

//抽签函数
void SpeechManager::speechDraw()
{
	cout << "第<<" << this->m_Index << ">>轮比赛选手正在抽签" << endl;
	cout << "-------------------------------------------" << endl;
	cout << "抽签后演讲顺序如下：" << endl;

	if (this->m_Index == 1)
	{
		//第一轮比赛
		random_shuffle(v1.begin(), v1.end());
		for (vector<int>::iterator it = v1.begin(); it != v1.end(); it++)
		{

			cout << *it << " ";

		}
		cout << endl;
	}
	else
	{
		//第二轮比赛
		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;
}

//比赛函数
void SpeechManager::speechContest()
{
	cout << "-------第<<" << this->m_Index << ">>轮比赛选手正在抽签------" << endl;
	
	//准备临时容器 存放小组成绩
	multimap<double, int, greater<double>>groupScore;

	int num = 0;//记录人员个数6人份

	vector<int>v_Scr;//比赛选手容器
	if (this->m_Index == 1)
	{
		v_Scr = v1;
	}
	else
	{
		v_Scr = v2;
	}

	//遍历所有的选手
	for (vector<int>::iterator it = v_Scr.begin(); it != v_Scr.end(); it++)
	{
		num++;
		//评委打分
		deque<double>d;
		for (int i = 0; i < 10; i++)
		{
			double score = (rand() % 401 + 600)/10.f;
		//	cout << score << " ";
			d.push_back(score);
		}
		//cout << endl;
		sort(d.begin(), d.end(),greater<double>());//进行排序
		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);//总分
		double avg = sum / (double)d.size();//平均分

		//打印平均分
		//cout << "编号：" << *it << " 姓名：" << this->m_Speaker[*it].m_Name << "获取平均分：" << avg << endl;

		//将平均分放到map 容器中
		this->m_Speaker[*it].m_Score[this->m_Index - 1] = avg;

		//将打分的数据 放入到临时的小组容器中
		groupScore.insert(make_pair(avg, *it));
		//每6人取出前三名
		if (num % 6 == 0)
		{
			cout << "第" << num / 6 << "小组比赛名次为：" << endl;
			for (multimap<double, int, greater<double>>::iterator it = groupScore.begin(); it != groupScore.end(); it++)
			{
				cout << "编号：" << it->second << " 姓名：" << this->m_Speaker[it->second].m_Name <<
					" 分数：" << this->m_Speaker[it->second].m_Score[this->m_Index - 1] << endl;
			}
			//取走前三名
			int count = 0;

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


			groupScore.clear();//清空容器
			cout << endl;


		}
	}

	cout << "----------第" << this->m_Index << "轮完毕！------------" << endl;
	system("pause");
}

void SpeechManager::showScore()
{
	cout << "------------第" << this->m_Index << "轮选手晋级的消息如下:------------------";
	cout << endl;
	vector<int>v;
	if (this->m_Index == 1)
	{
		v = v2;
	}
	else
	{
		v = vVictory;
	}

	for(vector<int>::iterator it = v.begin();it!=v.end();it++)
	{
		cout << "选手编号：" << *it << " 姓名：" << this->m_Speaker[*it].m_Name << " 得分：" << this->m_Speaker[*it].m_Score[this->m_Index - 1] << endl;
	}
	cout << endl;

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


//保存分数
void SpeechManager::saveRecord()
{
	ofstream ofs;
	ofs.open("speech.csv", ios::out | ios::app);//用追加的方式写文件

	//将每个数据写入到文件中
	for (vector<int>::iterator it = vVictory.begin(); it != vVictory.end(); it++)
	{
		ofs << *it << "," << this->m_Speaker[*it].m_Score[1] << ",";
	}
	ofs << endl;

	//关闭文件
	ofs.close();
	cout << "记录已保存" << endl;

	//更改文件的状态
	this->fileIsEmpty = false;
}

//查看记录
void SpeechManager::loadRecord()
{
	ifstream ifs("speech.csv", ios::in);//读文件
	if (!ifs.is_open())
	{
		this->fileIsEmpty = true;
		cout << "文件不存在" << endl;
		ifs.close();
		return;
	}
	//文件清空
	char ch;
	ifs >> ch;
	if (ifs.eof())
	{
		cout<<"文件为空"<<endl;
		this->fileIsEmpty = true;
		ifs.close();
		return;
	}
	//文件不为空
	this->fileIsEmpty = false;

	ifs.putback(ch);//将上面的数据读取单个字符，再放回

	string data;
	int index = 0;


	while (ifs >> data)
	{
		//cout << data << endl;
		vector<string>v;//存放六个字符串
		int pos = -1;//查找，的位置
		int start = 0;

		while (true)
		{
			pos = data.find(",", start);
			if (pos == -1)
			{
				//没有找到的情况
				break;
			}
			string temp = data.substr(start, pos - start);
			//cout << temp << endl;
			v.push_back(temp);

			start = pos + 1;
		}
		this->m_Record.insert(make_pair(index,v));
		index++;
	}
	ifs.close();
	
	//for (map<int, vector<string>>::iterator it = m_Record.begin(); it != m_Record.end(); it++)
	//{
	//	cout << it->first << "冠军编号:" << it->second[0] << " 得分：" << it->second[1] << endl;
	//}
}

//显示往届记录
void SpeechManager::showRecord()
{
	if (this->fileIsEmpty)
	{
		cout << "文件为空或不存在" << endl;
	}
	else
	{
		for (int i = 0; i < this->m_Record.size(); i++)
				{
					cout << "第" << i + 1 << "届" <<
						   "冠军编号:" << this->m_Record[i][0] << "  得分：" << this->m_Record[i][1] << "   ";
					cout << "亚军编号:" << this->m_Record[i][2] << "  得分：" << this->m_Record[i][3] << "   ";
					cout << "季军编号:" << this->m_Record[i][4] << "  得分：" << this->m_Record[i][5] << endl;

				}

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

//清空记录
void SpeechManager::clearRecord()
{
	cout << "是否确定清空文件?" << endl;
	cout << "1、是" << endl;
	cout << "2、否" << endl;
	int select = 0;

	cin >> select;

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

		//初始化容器和属性
		void initSpeech();

		//创建12名选手
		void creatSpeaker();

		//加载往届记录
		this->loadRecord();
		cout << "清空成功" << endl;
	}
	system("pause");
	system("cls");
}

SpeechManager::~SpeechManager()
{

}

基于STL的演讲管理系统

#include <iostream>
using namespace std;
#include "speechManager.h"
#include <string>

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

	//创建管理对象
	SpeechManager sm;

	//测试12名选手
	//for (map<int, Speaker>::iterator it = sm.m_Speaker.begin(); it != sm.m_Speaker.end(); it++)
	//{
	//	cout << "选手编号：" << it->first << "姓名：" << it->second.m_Name << "分数：" << it->second.m_Score[0] << endl;
//
	//}

	sm.Show_Menu();

	int choice;//用于存储用户输入

	while (true)
	{
		cout << "请输入您的选择:" << endl;

		cin >> choice;

		switch(choice)
		{
			case 1://开始比赛
				sm.startSpeech();
				break;
			case 2://查看往届记录
				sm.loadRecord();
				sm.showRecord();
				break;
			case 3://清空比赛记录
				sm.clearRecord();
				break;
			case 0://退出系统
				sm.exitSystem();
			default://清屏
				system("cls");
				break;
		}
	}

	


	system("pause");
	return 0;
}