#include?
#include?
#include?
#include?
#include?
using?namespace?std;

class?person
{
public:
	void?add（）;????
????void?del（）;????
????void?alter（）;???
????void?save_new（）;??
	void?show（）;???
????void?select（）;???
private:
????string?author;
	string?sex;
	string?telephone;
};

class?keyan
{
public:
????keyan（）;?????//默認(rèn)構(gòu)造函數(shù)
	char?menu（）;//首頁
????void?show（）;//顯示所有科研項(xiàng)目
????void?select（）;//查詢科研項(xiàng)目
private:
???	string?name;??????//科研名稱?????????
	string?author;???//科研作者
	string?sex;??????//性別
	string?publishing_company;???//經(jīng)費(fèi)
	string?date;?????//科研編號(hào)
	string?state;????//科研狀態(tài)
	string?laiyuan;??//科研來源
	string?telephone;???//聯(lián)系方式
};

class?manage_keyan
{
public:
????void?add（）;????
????void?del（）;????
????void?alter（）;???
????void?save_new（）;??
private:
????string?name;??????????????
	string?author;???
????string?sex;??????
	string?publishing_company;???
	string?date;??????
	string?state;????
	string?laiyuan;????
	string?telephone;???
};


keyan::keyan（）
{
????name?=?“\0“;
????author?=?“\0“;
????publishing_company?=?“\0“;
????date?=?“\0“;
}


//?主界面?????
char?keyan::menu（）????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
	{	
		system（“cls“）;
		cout<		
		cout<		cout<		cout<<“\t\t\t\t??主菜單?“<		cout<<“\t\t\t1.?添加科研項(xiàng)目“<		cout<<“\t\t\t2.?刪除科研項(xiàng)目?“<		cout<<“\t\t\t3.?顯示所有科研項(xiàng)目“<		cout<<“\t\t\t4.?修改科研項(xiàng)目?“<		cout<<“\t\t\t5.?查詢科研項(xiàng)目??“<		cout<<“\t\t\t6.?結(jié)束??“<		cout<<“\t\t\t???請(qǐng)選擇：“;??
	????char?choose;
?????????cin?>>choose;
????????fflush（stdin）;
????????return?choose;
}
	
	
//增加科研項(xiàng)目
void?manage_keyan::add（）
{
????cout?<????????<<“科研項(xiàng)目名稱?:“?;
????cin?>>name;
	cout<????fflush（stdin）;
????cout?<<“科研作者?:?“;
????cin?>>author;
	cout<????fflush（stdin）;

	cout?<<“性別?:?“;
????cin?>>sex;
	cout<????fflush（stdin）;

????cout?<<“經(jīng)費(fèi):?“;
????cin?>>publishing_company;
	cout<????fflush（stdin）;
????cout?<<“科研編號(hào)?:?“;
????cin?>>date;
	cout<????fflush（stdin）;
????cout?<<“項(xiàng)目狀態(tài)?:?“;
????cin?>>state;
	cout<???	fflush（stdin）;
	cout?<<“科研項(xiàng)目來源?:?“;
????cin?>>laiyuan;
	cout<????fflush（stdin）;

	cout?<<“聯(lián)系方式?:?“;
????cin?>>telephone;
	cout<????fflush（stdin）;

????save_new（）;
????cout?<????system（“pause“）;
}
??
//刪除科研項(xiàng)目
void?manage_keyan::del（）
{
????ofstream?outData（“temp.txt“?ios::out）;
????ifstream?inData（“pbook.txt“?ios::in）;?
if?（!outData?||?!inData）
????{
????????cout?<????????system（“pause“）;
????????return;
????}
????
????string?sign;
????cout?<