c++小项目：基于STL的演讲比赛流程管理系统-创新互联

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>record;//往届记录

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){vectorv;

		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();
}

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;

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();
}

在SpeechManager.cpp中的void Init_speaker()函数中初始化记录容器

this->record.clear();

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();

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>::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");
}

实现效果：

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");
}

实现效果：

• 至此本项目结束

#pragma once;
#include#includeusing namespace std;

class Speaker{public:
	string Name;
	double Score[2];
};

#pragma once
#include#include#include

#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::iterator it = v1.begin(); it != v1.end(); it++) cout<< *it<< " ";
		cout<< endl;
	}
	else{random_shuffle(v2.begin(), v2.end());
		for (vector::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>group;
	int num = 0;

	vectorv;
	if (this->rounds == 1) v = v1;
	else v = v2;

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

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

		sort(d.begin(), d.end(), greater());
		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>::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>::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;

	vectorv;
	if (this->rounds == 1) v = v2;
	else v = third;

	for (vector::iterator it = v.begin(); it != v.end(); it++)
		cout<< "编号："<< *it<< " 姓名："<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::iterator it = third.begin(); it != third.end(); it++)
		ofs<< *it<< ","<< speaker[*it].Score[1]<< ",";
	ofs<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){vectorv;

		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>::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");
}

#include#include"SpeechManager.h"
#includeusing 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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