STL 中容器 map 的使用_map<int,student> m;-优快云博客

本文介绍了一个使用STL中的map容器实现的学生信息管理系统。该系统提供了学生信息的插入、更新、查找和删除等功能，并通过一个简单的C++程序演示了这些功能的使用方法。

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以下代码实现stl中容器 map 的简单操作。包括插入，更新，遍历，查找。

#pragma once

#include "string"
#include "iostream"
#include "map"

using namespace std;

class CStudent
{
	string name;
	int english;
public:
	CStudent(void);
	~CStudent(void);
	CStudent(string name, int english);
public:
	void inline printit()
	{
		cout<<"name=";
		cout<<name;
		cout<<"   english=";
		cout<<english;
		cout<<endl;
	}
};

#include "stdafx.h"
#include "Student.h"


CStudent::CStudent(void)
{
}

CStudent::CStudent(string name, int english)
{
	this->name = name;
	this->english = english;
}


CStudent::~CStudent(void)
{
}

#pragma once

#include "Student.h"
#include "map"

using namespace std;

class CStudentMap
{
public:
	CStudentMap(void);
	~CStudentMap(void);
private:
	map<int, CStudent> m_studentmap;
public:
	bool insert(int number, CStudent stu);
	bool remove(int number);
	bool update(int number, CStudent stu);	
	bool find(int number, CStudent& stu);
	void output(); 
	int  count();

};

#include "stdafx.h"
#include "StudentMap.h"
#include "algorithm"


CStudentMap::CStudentMap(void)
{
}


CStudentMap::~CStudentMap(void)
{
}

int  CStudentMap::count()
{
	return m_studentmap.size();
}

bool CStudentMap::insert(int number, CStudent stu)
{
	pair<map<int, CStudent>::iterator, bool> Insert_Pair;
	Insert_Pair = m_studentmap.insert(pair<int, CStudent>(number, stu));
	if(Insert_Pair.second)
	{
		return true;
	}
	else
	{
		return false;
	}

	/*Insert_Pair = m_studentmap.insert(map<int, CStudent>::value_type(number, stu));
	if(Insert_Pair.second == true)
	{
		return true;
	}
	else
	{
		return false;
	}*/

}

bool CStudentMap::remove(int number)
{
	map<int, CStudent>::iterator LI;
	LI = m_studentmap.find(number);
	if (LI != m_studentmap.end())
	{
		m_studentmap.erase(LI);
		return true;
	}
	else
	{
		return false;
	}
}


bool CStudentMap::update(int number, CStudent stu)
{
	m_studentmap[number] = stu;
	return true;
}

void CStudentMap::output()
{
	map<int, CStudent>::iterator LI;
	for(LI = m_studentmap.begin(); LI != m_studentmap.end(); LI++)
	{
		LI->second.printit();
	}
}

bool CStudentMap::find(int number, CStudent &stu)
{
	map<int, CStudent>::iterator LI;
	LI = m_studentmap.find(number);
	if (LI != m_studentmap.end())
	{
		stu = (LI)->second;
		return true;
	}
	else
	{
		return false;
	}
}

以下为主函数测试：

// stlmap.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "StudentMap.h"


int _tmain(int argc, _TCHAR* argv[])
{

	CStudentMap smap;

	CStudent stu[10];
	for(int i=0; i<10; i++)
	{
		char buff[100];
		sprintf_s(buff, 100 ,"zhang%02d",i);
		string name(buff);
		CStudent student(name, i*10);
		stu[i] = student;
		smap.insert(i, stu[i]);	
	}
	smap.output();

	bool ret1 = smap.insert(0, stu[0]);	

	bool ret = smap.find(15, stu[8]);
	cout<<"************************"<<endl;
	if (ret)
	{
		stu[8].printit();
	}
	else 
	{
		cout<<"not find"<<endl;
	}

	

	system("pause");
	return 0;
}