cpp1.cpp

学生管理系统 学生管理系统 学生管理系统

#include <iostream.h>
#include <stdlib.h>
#include <fstream.h>
#include <iomanip.h>
static int n=0;
int Comparison(char s1[],char s2[])
{
	int i=0;
	while (s1[i]!='\0' && s2[i]!='\0' && s1[i]==s2[i])
		i++;
	if(s1[i]=='\0' || s2[i]=='\0')
		return 1;
	else
		return 0;
}
class Student
{
	char tag;                           //定义档案标志
	unsigned int OrdNum;                //定义学生序号
	char RegNum[12];                    //定义学生学号
	char Name[7];                       //定义学生姓名
	unsigned int Age;                   //定义学生年龄
	char Sex[3];                        //定义学生性别
	char Bedroom[6];                    //定义学生宿舍 
	char TelNum[9];                     //定义学生电话
public:
//	int getStudentNo()
//	{
//		return Age;
//	}
	void Getdata()						//输入学生档案					
	{
		tag='#';
        cout<<"(序号 学号 姓名 年龄 性别 宿舍 电话):";
		cin>>OrdNum>>RegNum>>Name>>Age>>Sex>>Bedroom>>TelNum;
	}
	char Gettag()						//获得档案标志
	{
		return tag;
	}
	void Display()						//显示档案信息
	{
		if(tag=='#')	cout<<setiosflags(ios::left)
						<<setw(7)<<OrdNum<<setw(16)<<RegNum<<setw(11)<<Name
						<<setw(7)<<Age<<setw(7)<<Sex<<setw(10)<<Bedroom
						<<setw(13)<<TelNum<<endl;
	}
	char *getname()						//获得学生姓名
	{
		return Name;
	}
};
void Input()
{
	ofstream output("Student.dat");
	Student s;
	cout<<"输入学生档案"<<endl;
	cout<<"输入学生人数:";
	cin>>n;
	for (int i=0; i<n; i++)
	{
		cout<<"第"<<i+1<<"个学生";
		s.Getdata();
		output.write((char  *)&s,sizeof(s));
	}
	output.close();
}
void Output()
{
	ifstream  input("Student.dat");
    Student s;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<"                                   学生档案                                    "<<endl;
	cout<<"-------------------------------------------------------------------------------"<<endl;
	cout<<setiosflags(ios::left)
		<<setw(7)<<"序号"<<setw(16)<<"学号"<<setw(11)<<"姓名"<<setw(7)<<"年龄"<<setw(7)<<"性别"
		<<setw(10)<<"宿舍"<<setw(13)<<"电话"<<endl;
	cout<<"-------------------------------------------------------------------------------"<<endl;
	
	input.read((char *)&s, sizeof(s));
	while(input)
	{
		s.Display();
		input.read((char*)&s,sizeof(s));
	};
	cout<<"-------------------------------------------------------------------------------"<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
	cout<<endl;
    input.close();
	char p;
	do
	{
		cout<<"请按Q键返回主菜单......";
		cin>>p;
	}while((p!='q')&(p!='Q'));
	cout<<endl;
	cout<<endl;
}

void Search()
{
	char sname[10];
	ifstream file("Student.dat");
    Student one;
	file.seekg(0);
	cout<<"输入要查询的姓名（可输入姓氏）:";
	cin>>sname;
	cout<<"输出查询结果:"<<endl;
	cout<<setiosflags(ios::left)
		<<setw(7)<<"序号"<<setw(16)<<"学号"<<setw(11)<<"姓名"<<setw(7)<<"年龄"<<setw(7)<<"性别"
		<<setw(10)<<"宿舍"<<setw(13)<<"电话"<<endl;
	file.read((char *)&one,sizeof(one));
	while (file)
	{ 
		if(Comparison(one.getname(),sname)==1)
			one.Display();
		file.read((char*)&one,sizeof(one));
	};
	file.close();
}
void Increase()
{ 
	fstream outapp("Student.dat",ios::app);
	Student one;
	cout<<"添加数据:";
	one.Getdata();
	outapp.write((char*)&one,sizeof(one));
	outapp.close();
}
void LogicDel()
{
	char sname[12];
	int i=0;
	fstream outdel("Student.dat",ios::in|ios::out);
	Student one ;
	outdel.seekg(0);
	cout<<"输入要删除的姓名(可只输入姓氏):";
	cin>>sname;
	while(!outdel.eof())
	{
		outdel.seekp(sizeof(Student)*i);
		outdel.read((char*)&one,sizeof(one));    
		if (Comparison(one.getname(),sname)==1 && one.Gettag()=='#')
		 {
	         outdel.seekp(sizeof(Student)*i);
	         outdel.put('*');
		 }
         i++;
	}
	outdel.close();
}
void PhysicsDel()
{
	fstream outdel("Student.dat",ios::in);
	fstream temp("temp",ios::out|ios::trunc);
	Student s;
	while(!outdel.eof())
	{
		  outdel.read((char *)&s,sizeof(Student));
		  if (s.Gettag()=='#')
			    temp.write((char *)&s,sizeof(Student));
	}
	outdel.close();
	temp.close();
	fstream outdel1("Student",ios::out|ios::trunc);
	fstream temp1("temp",ios::in);
	while (!temp1.eof())
	{
		temp1.read((char *)&s,sizeof(Student));
		outdel1.write((char *)&s,sizeof(Student));
	}
	outdel1.close();
	temp1.close();
	cout<<"此记录已物理删除"<<endl;
}

void MainMenu()
{
	system("cls");
	cout<<"                                                                     "<<endl;
	cout<<"                                                                     "<<endl;
	cout<<"                                                                     "<<endl;
	cout<<"                            计算机系学生档案管理系统                 "<<endl;
	cout<<"               **************************************************    "<<endl;
	cout<<"               $               〖1.输入学生档案〗               $    "<<endl;
	cout<<"               $                                                $    "<<endl;
	cout<<"               $               〖2.输出学生档案〗               $    "<<endl;
	cout<<"               $                                                $    "<<endl;	
	cout<<"               $               〖3.查询学生档案〗               $    "<<endl;
	cout<<"               $                                                $    "<<endl;
	cout<<"               $               〖4.添加学生档案〗               $    "<<endl;
	cout<<"               $                                                $    "<<endl;
	cout<<"               $               〖5.逻辑删除档案〗               $    "<<endl;
	cout<<"               $                                                $    "<<endl;
	cout<<"               $               〖6.物理删除档案〗               $    "<<endl;
	cout<<"               $                                                $    "<<endl;
	cout<<"               $               〖7.按任意键退出〗               $    "<<endl;
	cout<<"               **************************************************    "<<endl;
	cout<<"                                                                     "<<endl;
}

void main()
{
	int select;
	MainMenu();
	do
	{
		cout<<"               请输入您所要选择的功能(1-7):";
		cin>>select;
		cout<<endl;
		cout<<endl;
		cout<<endl;
		cout<<endl;
		cout<<endl;
		switch(select)
		{
			case 1:Input();       MainMenu();  break;		//选择1时执行『输入学生档案』
			case 2:Output();      MainMenu();  break;		//选择2时执行『输出学生档案』
			case 3:Search();      MainMenu();  break;		//选择3时执行『查询学生档案』
			case 4:Increase();    MainMenu();  break;		//选择4时执行『添加学生档案』
			case 5:LogicDel();    MainMenu();  break;		//选择5时执行『逻辑删除档案』
			case 6:PhysicsDel();  MainMenu();  break;		//选择6时执行『物理删除档案』
		}
	}while(select>=1 && select<=6);
}