qq d.cpp

学生管理系统

#include "stdafx.h"
#include "iostream"
#include <stdio.h>
#include <iomanip>
#include <stdlib.h>
#include <malloc.h>
#include "fstream" 
#include "windows.h"
using namespace std;

//定义学生数据结构体
struct Student
{
	int Number;//学号
	char Name[10];//姓名
	float  phy;//物理
	float math;//数学
	float eng;//英语
	float chin;//语文
	float zh;//综合
	float total;//总分
	Student *next;
};
fstream outstuf;

//函数声明部分
void Pause( );  
void OutCaption( );
void OutSpace(int); 
void TableLine(int);
void TableHead( );
void ShowLink( Student *);

int FindLink( Student *);
int MainMenu(  );
void SaveLink(  Student *);

Student *DeleteLink( Student *);
Student *GreatLink();

void LoadLink();


//清空输入流并无回显暂停等待回车
void Pause( )
{
	int c;
	while ( (c = getchar()) != '\n' && c != EOF )
		clearerr(stdin);
	getchar();
}

//该函数用于输出n个空格
void OutSpace(int n)
{
	int i;
	for(i=1;i<=n;i++)cout<<" ";
}

//输出首行或尾行制表符
void TableLine(int Judge)
{
	int i; 
	if(Judge==0)cout<<" ┏";
	else cout<<" ┗";
	for(i=1;i<=32;i++)
	{
		if((i%4==0)&&(i!=32))
		{
			if(Judge==0)cout<<"┳";
			if(Judge==1)cout<<"┻";
		}
		else cout<<"━";
	};
	if(Judge==0)cout<<"┓\n";
	else cout<<"┛\n";
}

//该函数用于输出格式头
void TableHead( )
{
	TableLine(0);
	cout<<" ┃学号  ┃姓名　┃物理  ┃数学  ┃英语  ┃语文  ┃综合  ┃总分    ┃";

}  

//该函数用于输出程序标题
void OutCaption( )
{
	int i;
	//以下用制表符制表 
	cout<<"┏"; 
	for(i=1;i<=38;i++)cout<<"━";
	cout<<"┓┃";
	OutSpace(26); 
	cout<<"学  生  成 绩 查 询  系   统";
	OutSpace(20);
	cout<<"┃";
	cout<<"┗"; 
	for(i=1;i<=38;i++)cout<<"━";
	cout<<"┛";
}

//该函数用于绘制主界面
int MainMenu( )
{
	system("cls");
	system( "color 1F" );
	OutCaption();
	cout<<"\n\n";  
	OutSpace(32);
	cout<<"1.输入学生数据\n";
	OutSpace(32);
	cout<<"2.查询学生成绩\n";
	OutSpace(32);
	cout<<"3.删除学生数据\n";
	OutSpace(32);
	cout<<"4.存储学生数据\n";
	OutSpace(32);
	cout<<"5.读取学生数据\n";
	OutSpace(32);
	cout<<"0.退出\n";
	cout<<"\n\n\n";  
	OutSpace(31); 
	cout<<"请输入您的选项:";
	int temp;
	fflush(stdin);
	cin>>temp; 
	return (temp); 
}

//该函数用于建立单向链表并赋值
Student *GreatLink( )
{
	system("cls");
	OutCaption();
	cout<<"\n\n";  
	OutSpace(26);
	cout<<"请输入学生信息,以 0 结束\n\n\n"; 
	OutSpace(32);
	Student *head,*temp1,*temp2,*temp3;
	head=NULL;
	temp1=(struct Student *)malloc(sizeof( Student));
	cout<<"请输入学生学号:";
	fflush(stdin);
	cin>>temp1->Number;
	if(temp1->Number!=0)
	{
		OutSpace(32);
		cout<<"请输入学生姓名:";
		cin>>temp1->Name;
		OutSpace(32);
		cout<<"请输入物理成绩:";
		cin>>temp1->phy;
		OutSpace(32);
		cout<<"请输入数学成绩:";
		cin>>temp1->math;
		OutSpace(32);
		cout<<"请输入英语成绩:";
		cin>>temp1->eng;
		OutSpace(32);
		cout<<"请输入语文成绩:";
		cin>>temp1->chin;
		OutSpace(32);
		cout<<"请输入综合成绩:";
		cin>>temp1->zh;
		temp1->total = temp1->chin + temp1->math + temp1->eng + temp1->zh + temp1->phy ;
		if( temp1->phy>150||temp1->phy<0||
			temp1->math>150||temp1->math<0||
			temp1->eng>150||temp1->eng<0||
			temp1->chin>150||temp1->chin<0||
			temp1->zh>150||temp1->zh<0 )
		{
			cout<<"分数输入错误,按ENTER重新操作\n"; 
			Pause();
			return 0;
		}
		while(temp1->Number!=0)
		{
			if(head==NULL)head=temp1;
			temp2=(struct Student *)malloc(sizeof(struct Student));
			temp1->next=temp2;//前一节点的后继指针指向新开辟的节点
			temp3=temp1;//保留住前一节点的指针
			temp1=temp2;//方面的循环
			system("cls");
			OutCaption();
			cout<<"\n\n";  
			OutSpace(26);
			cout<<"请输入学生信息,以 0 结束\n\n\n"; 
			OutSpace(32);
			cout<<"请输入学生学号:";
			cin>>temp1->Number;
			if(temp1->Number!=0)
			{
				OutSpace(32);
				cout<<"请输入学生姓名:";
				cin>>temp1->Name;
				OutSpace(32);
				cout<<"请输入物理成绩:";
				cin>>temp1->phy;
				OutSpace(32);
				cout<<"请输入数学成绩:";
				cin>>temp1->math;
				OutSpace(32);
				cout<<"请输入英语成绩:";
				cin>>temp1->eng;
				OutSpace(32);
				cout<<"请输入语文成绩:";
				cin>>temp1->chin;
				OutSpace(32);
				cout<<"请输入综合成绩:";
				cin>>temp1->zh;
				temp1->total = temp1->chin + temp1->math + temp1->eng + temp1->zh + temp1->phy ;
			}
			else
			{
				temp3->next=NULL;//前节点的后继指针为空,链表结束于前节点
			}
			if( temp1->Number == 0 ) break;
			if( temp1->phy>150||temp1->phy<0||
				temp1->math>150||temp1->math<0||
				temp1->eng>150||temp1->eng<0||
				temp1->chin>150||temp1->chin<0||
				temp1->zh>150||temp1->zh<0 )
			{
				cout<<"分数输入错误,请重新输入\n"; 
				delete temp1;
				Student *temp1 = NULL;
				temp1 = head;
				Pause();
				temp3->next=NULL;
				continue;
			}
		}

	}
	free(temp1);//释放新开辟的未用节点,节省内存开销 
	return head;
}

//该函数用于查找指定学号的学生信息
int FindLink( Student *temp)
{
	int iSearchNum;
	system("cls");
	OutCaption();
	cout<<"\n\n"; 
	if(temp!=NULL)
	{
		OutSpace(23);
		cout<<"请在下面输入学生学号,输入返回\n\n\n"; 
		OutSpace(32);
		cout<<"请输入查询学号:";
		fflush(stdin);
		cin>>iSearchNum;
		while((temp->Number!=iSearchNum)&&(temp->next!=NULL))
		{
			temp=(temp->next);
		}
		if(temp->Number==iSearchNum)
		{
			system("cls");
			OutCaption();
			cout<<"\n\n";  
			TableHead();
			cout<<"\n ";
			cout<<"┃"<<setw( 4 )<<temp->Number;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->Name;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->phy;
			cout<<setw( 4 )<<"┃"<<setw( 3 )<<temp->math;
			cout<<setw( 5 )<<"┃"<<setw( 4 )<<temp->eng;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->chin;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->zh;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->total
				<<setw( 6 )<<"┃";
			cout<<"\n";
			TableLine(1);
			cout<<"\n\n\n";
			OutSpace(34);
			cout<<"按回车键返回";
			Pause();
			return 0;
		}
		else
		{
			system("cls");
			OutCaption();
			cout<<"\n\n";
			OutSpace(23);
			cout<<"未能找到该笔数据,按回车键返回\n";
			OutSpace(23);
			Pause();
			return 1;
		}
	}
	else
	{
		OutSpace(23);
		cout<<"尚未创建或读取列表,按回车键返回";
		Pause();
		return 1; 
	}
}

//用于向屏幕输出显示链表
void ShowLink( Student *temp)
{
	system("cls");
	OutCaption();
	cout<<"\n\n";  
	TableHead();
	cout<<"\n";
	while(temp!=NULL)
	{
		cout<<"┃"<<setw( 4 )<<temp->Number;
		cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->Name;
		cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->phy;
		cout<<setw( 4 )<<"┃"<<setw( 3 )<<temp->math;
		cout<<setw( 5 )<<"┃"<<setw( 4 )<<temp->eng;
		cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->chin;
		cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->zh;
		cout<<setw( 6 )<<"┃"<<setw( 4 )<<temp->total
			<<setw( 6 )<<"┃";
		cout<<"\n";
		temp=temp->next;       
	}
	TableLine(1);
	cout<<"\n\n\n";
	OutSpace(34);
	cout<<"按回车键返回";
	Pause();
} 




//该函数用于删除学生信息
Student *DeleteLink( Student *temp)
{
	Student *psctSaveHead=temp,*psctNewTemp;
	int iSearchNum;
	char cJudge;
	system("cls");
	OutCaption();
	cout<<"\n\n"; 
	if(temp!=NULL)
	{
		OutSpace(23);
		cout<<"请在下面输入学生学号,输入返回\n\n\n"; 
		OutSpace(32);
		cout<<"请输入删除的学号:";
		fflush(stdin);
		cin>>iSearchNum;
		if(iSearchNum==0)return (temp);
		while((temp->Number!=iSearchNum)&&(temp->next!=NULL))
		{
			psctNewTemp=temp;
			temp=(temp->next);
		}
		if(temp->Number==iSearchNum)
		{
			system("cls");
			OutCaption();
			cout<<"\n\n";
			OutSpace(4); 
			cout<<"您要删除的数据是:\n";  
			TableHead();
			cout<<"\n ";
			cout<<"┃"<<setw( 4 )<<temp->Number;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->Name;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->phy;
			cout<<setw( 4 )<<"┃"<<setw( 3 )<<temp->math;
			cout<<setw( 5 )<<"┃"<<setw( 4 )<<temp->eng;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->chin;
			cout<<setw( 4 )<<"┃"<<setw( 4 )<<temp->zh;
			cout<<setw( 6 )<<"┃"<<setw( 4 )<<temp->total
				<<setw( 6 )<<"┃";
			TableLine(1);
			cout<<"\n\n\n";
			OutSpace(34);
			cout<<"确定删除(y/n)?";
			fflush(stdin);
			cin>>&cJudge;
			if(cJudge=='y'||cJudge=='Y')
			{
				if(temp==psctSaveHead)
				{
					temp=psctSaveHead;
					psctSaveHead=(psctSaveHead->next);
					free(temp);
				}
				else
					if(temp->next==NULL)
					{
						psctNewTemp->next=NULL;
						free(temp);
					}
					else
					{
						psctNewTemp->next=temp->next;
						free(temp);
					}
					return (psctSaveHead);
			}
			else
				return (psctSaveHead);
		}
		else
		{
			system("cls");
			OutCaption();
			cout<<"\n\n";
			OutSpace(23);
			cout<<"未能找到该笔数据,按回车键返回\n";
			OutSpace(23);
			Pause();
			return (psctSaveHead);
		}
	}
	else
	{
		OutSpace(23);
		cout<<"尚未创建或读取列表,按回车键返回";
		Pause();
		return (psctSaveHead); 
	}
}
//该函数用于存储学生信息到文件
void SaveLink( Student *temp)
{
	char cDir[100];
	system("cls");
	OutCaption();
	cout<<"\n\n";  
	OutSpace(26);
	cout<<"请输入保存文件的路径:\n";
	OutSpace(26); 
	cin>>cDir;
	outstuf.open( cDir,ios_base::out );
	if( !outstuf )
	{
		system("cls");
		OutCaption( );
		cout<<"\n\n";  
		OutSpace(26);
		cout<<"无法存储该文件,输入的路径有误!\n";
	}
	else
	{
		cout << "正在写入,请稍候.......\n\n\n\n";
		Sleep( 1200 );
		while(temp!=NULL)
		{
			outstuf<<"学生学号: "<<temp->Number
				<<"\n学生姓名: "<<temp->Name
				<<"\n物理成绩: "<<temp->phy
				<<"\n数学成绩: "<<temp->math
				<<"\n英语成绩: "<<temp->eng
				<<"\n语文成绩: "<<temp->chin
				<<"\n综合成绩: "<<temp->zh
				<<"\n总分:     "<<temp->total<<"\n\n";
			temp=temp->next;       
		}
		cout << "文件写入成功,1秒后自动返回!\n";
		Sleep( 1000 );
		outstuf.close();
	}

} 

//该函数用于从文件读取学生信息
void LoadLink( )
{
	ifstream instuf;
	char cDir[100];
	system("cls");
	OutCaption();
	cout<<"\n\n";  
	OutSpace(26);
	cout<<"请输入需要读取文件的路径:\n";
	OutSpace(26); 
	cin>>cDir;
	instuf.open( cDir,ios::in );
	if( !instuf )
	{
		system("cls");
		OutCaption();
		cout<<"\n\n";  
		OutSpace(26);
		cout<<"无法打开该文件,输入的文件名有误或不存在!\n";
		OutSpace(26);
		cout<<"请按回车键返回!";
		Pause();
	}
	else
	{
		cout << "文件打开成功......."<<endl;
		Sleep( 1200 );
		char ch[100];
		int i = 1;
		while(!instuf.eof())
		{
			instuf >> ch;
			cout  << ch <<"  "<<endl ;
			i++;

		}

	}
	instuf.close();
	system("pause");
}
int _tmain(int argc, _TCHAR* argv[])
{
	int iJudge=1,t=1;
	Student *temp;
	temp=NULL;
	while(1)
	{
		switch(MainMenu())
		{
		case 1:
			temp=GreatLink( );break;
		case 2:
			FindLink( temp );break;
		case 3:
			temp=DeleteLink( temp );break;
		case 4:
			SaveLink( temp );break;
		case 5:
			  LoadLink( );break;
		case 0: 
			exit( 0 );
		default:
			{
				cout<<"输入错误,请重新输入,2秒后自动返回\n"<<endl;Sleep( 2000 );break;
			}
		}
	}
	system("pause");
	return 0;
}