#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<malloc.h>
void prin1();
void choose();
typedef struct subjects  //定义课程信息结构体
{
	int num; //课程编号
	char name[20]; //课程名称
	char kind[10];//课程性质
	int stime;//总学时
	int ttime;//授课学时
	int etime;//实验或上机学时 
	int score;//学分
	int term;//开课学期
	struct subjects *next; 
 } SUB;
 SUB *head=NULL;
  //下面定义链表模块
 SUB *create_form()
 {
 	SUB *head,*tail,*p;//定义头节点，尾节点，中间节点。 
 	int num,stime,ttime;
 	int etime,score,term;
 	char name[20],kind[10];
 	int size=sizeof(SUB);
 	head=tail=NULL;
 	printf("输入选修课程信息:\n");
 	scanf("%d%s%s%d%d%d%d%d",&num,name,kind,&stime,&ttime,&etime,&score,&term);
 	while(num!=0)
 	{
 		p=(SUB *)malloc(size);
 		p->num=num;
 		strcpy(p->name,name);
 		strcpy(p->kind,kind);
 		p->stime=stime;
 		p->ttime=ttime;
 		p->etime=etime;
 		p->score=score;
 		p->term=term;
 		if(head==NULL)
 		head=p;
 		else
 		tail->next=p;
 		tail=p;
 		scanf("%d%s%s%d%d%d%d%d",&num,name,kind,&stime,&ttime,&etime,&score,&term);
	 }
	 tail->next=NULL;
	 return head;
  } 
   //保存文件模块
  void savefile()   //保存文件
  {
  	SUB *p;
  	FILE *fp;fp=fopen("2.txt","w");
if(fp==NULL)exit(0);
printf("课程编号  课程名称  课程性质  总学时  授课学时  实践或上级学时  学分  开课学期\n");
for(p=head;p;p=p->next)
fprintf(fp,"%5d%12s%9s%9d%9d%11d%11d%7d\n",p->num,p->name,p->kind,p->stime,p->ttime,p->etime,p->score,p->term);
fclose(fp);
printf("创建后信息已放入'2.txt'文件中\n");
system("pause");}
void savefile1()
{
	SUB *p;
  	FILE *fp;fp=fopen("3.txt","w");
if(fp==NULL)exit(0);
for(p=head;p;p=p->next)
fprintf(fp,"%5d%12s%9s%9d%9d%11d%11d%7d\n",p->num,p->name,p->kind,p->stime,p->ttime,p->etime,p->score,p->term);
fclose(fp);
printf("创建后信息已放入'3.txt'文件中\n");
system("pause");
	
	
}
  //读取文件模块
 void readfile()//阅读文件
 {
 	void *myInsert(SUB*);
	 SUB *newSub;//新课程
	 int num,stime,ttime,etime;
	 int score,term;
	 char c,name[20],kind[10],fname[20];
	 FILE *fp;
	 fp=fopen("2.txt","r");
	 while(!feof(fp))
	 {
	 	newSub=(SUB*)malloc(sizeof(SUB));
	 	fscanf(fp,"%d%s%s%d%d%d%d%d\n",&newSub->num,newSub->name,newSub->kind,&newSub->stime,&newSub->ttime,&newSub->etime,&newSub->score,&newSub->term);
	 	myInsert(newSub);
	  } 
	  fclose(fp);
  } 
  //下面定义浏览模块
  void prin()
  {
   	SUB *ptr;
  	head=NULL;
  	readfile();
  	if(head==NULL)
  	{
  		printf("\n\n\t**********NO RECORDS!**********\n");
  		return;
	  }
	  printf("课程编号  课程名称  课程性质  总学时  授课学时  实践或上级学时  学分  开课学期\n");
	  for(ptr=head;ptr;ptr=ptr->next)
	  {
	  	printf("%5d%12s%9s%9d%9d%11d%11d%7d\n",ptr->num,ptr->name,ptr->kind,ptr->stime,ptr->ttime,ptr->etime,ptr->score,ptr->term);

	  }
	  system("pause");
   } 
    //下面定义浏览已选修课程模块
   void prin1()
   {
   SUB *ptr;
   FILE *fp;
   if((fp=fopen("3.txt","r"))==NULL)
   {
   	printf("Cannot open file.\n");
   	choose();
	} 
	printf("课程编号  课程名称  课程性质  总学时  授课学时  实践或上机学时  学分  开课学时\n");
	while(!feof(fp))
	{
		ptr=(SUB*)malloc(sizeof(SUB));
		fscanf(fp,"%d%s%s%d%d%d%d%d",&ptr->num,ptr->name,ptr->kind,&ptr->stime,&ptr->ttime,&ptr->etime,&ptr->score,&ptr->term);
		printf("%5d%12s%9s%9d%9d%11d%11d%7d\n",ptr->num,ptr->name,ptr->kind,ptr->stime,ptr->ttime,ptr->etime,ptr->score,ptr->term);
		}
		system("pause");
	}
	
	//插入链表模块	
	void *myInsert(SUB *subj)//链表插入操作
	{
		SUB *ptr,*ptr2;
		ptr=subj;
		if(head==NULL)
		{
			head=ptr;
			head->next=NULL;
		}
		else
		{
			for(ptr2=head;ptr2;ptr2=ptr2->next)
			if(ptr2->next==NULL)
			{
				ptr2->next=subj;
				subj->next=NULL;
				break;
			}
		}
		return head;
	 } 
	 
		 //添加模块
	 void *insert()
	 {
	 	SUB *ptr,*subj;
	 	int size=sizeof(SUB);
	 	char ch,ch1;
	 	while(ch!='0')
	 	{
	 		subj=(SUB *)malloc(size);
	 		ptr=subj;
	 		printf("请输入要插入的课程信息:\n");
	 		printf("\n\t\t 请输入课程编号:");
	 		scanf("%d",&subj->num);
	 		printf("\n\t\t 请输入课程名称:");
	 		scanf("%s",&subj->name);
	 		printf("\n\t\t 请输入课程性质:");
			 scanf("%s",&subj->kind);
			 printf("\n\t\t 请输入总学时:");
			 scanf("%d",&subj->stime);
			 printf("\n\t\t 请输入授课学时:");
			 scanf("%d",&subj->ttime);
			 printf("\n\t\t 请输入实践或上机学时:");
			 scanf("%d",&subj->etime);
			 printf("\n\t\t 请输入学分:");
			 scanf("%d",&subj->score);
			 printf("\n\t\t 请输入开课学期:");
			 scanf("%d",&subj->term);
			 myInsert(subj);
			 printf("\n添加完毕，新信息存入文件夹\n");
			 printf("\n\n 继续插入请按回车\n");
			 printf("\n结束添加请按 0:[ ]\b\b");
			 ch1=getchar();
			 ch=getchar(); 
		 }
		 return head;
	  } 
	  	  //删除模块
	  void *del()
	  {
	  	SUB *p1,*p2;
	  	char ch,ch1;
	  	int num;
	  	while(ch!='0')
	  	{
	  		printf("请输入想删除的课程编号:[   ]\b\b\b\b");
	  		scanf("%d",&num);
	  		if(head->num==num);
	  		{
	  			p2=head;
	  			head=head->next;
	  			free(p2);
			  }
			  if(head==NULL)
			  return NULL;
			  p1=head;
			  p2=head->next;
			  while(p2)
			  {
			  	if(p2->num==num)
			  	{
			  		p1->next=p2->next;
			  		free(p2);
				  }
				else
				p1=p2;
				p2=p1->next;  
			  }
			  printf("\n继续删除按回车\n");
			  printf("\n结束删除按 0:[]\b\b");
			  ch1=getchar();
			  ch=getchar(); 
		  }
		  return head;
		  system("pause");	
	   } 

//选修课程模块
void choose()
{
	SUB *p,*q;
	int a[5];
	int num,total=0,i=0,j;
	printf("输入想要选修的课程编号,编号之间用空格分开\n");
	scanf("%d",&num);
	printf("如果确认输入完要选的编号，请输入 0:[]\n\n");
	while(num!=0)
	{
		for(p=head;p;p=p->next)
		if(p->num==num)
		{
			total=total+p->score;
			a[i]=num;
			i++;
		}
		scanf("%d",&num);
	}
	if(total<60)
	{
		printf("选修总学分为%d,未达到60，选修失败！",total);
		system("pause");
	}
	else
	{
		FILE*fp;
		fp=fopen("my_sub.txt","w");
		for(j=0;j<i;j++)
		for(q=head;q;q=q->next)
		if(q->num==a[j])
		fprintf(fp,"%5d%12s%9s%9d%9d%11d%11d%7d\n",q->num,q->name,q->kind,q->stime,q->ttime,q->etime,q->score,q->term);
		fclose(fp);
		printf("\t\t\n*****选修成功！*******\n");
		printf("\n 您选修的课程总学分为%d,课程分别为:\n",total);
		printf("课程编号  课程名称  课程性质  总学时  授课学时  实践或上级学时  学分  开课学期\n");
		for(j=0;j<i;j++)
		for(q=head;q;q=q->next)
		if(q->num==a[j])
		printf("%5d%12s%9s%9d%9d%11d%11d%7d\n",q->num,q->name,q->kind,q->stime,q->ttime,q->etime,q->score,q->term);
		printf("\n以上信息全部保存在'my_sub.txt'中\n");
		
	}
	system("pause");
 } 
 	
	//下面定义查询板块
	void search()
	{
		int a,num;
		int t=1;
		char type[10],min[10];
		SUB *ptr;
		L1:system("cls");
		printf("\n\n\t\t***********请选择查询方式***********\n");
		printf("\n\t\t\t1--按课程名称查找\n");
		printf("\n\t\t\t2--按课程性质查找\n");
		printf("\n\t\t\t3--按学分查找\n");
		printf("\n\t\t\t4-退出查找\n");
		printf("\n\n\t\t************************************\n");
		printf("\n\nChoose your numeber(1-4):[]\b\b");
        scanf("%d",&a); 
        switch(a)
        {
        	case 1:printf("输入查找课程名:");
        	scanf("%s",min);
        	printf("课程编号  课程名称  课程性质  总学时  授课学时  实践或上机学时  学分  开课学时\n");
        	for(ptr=head;ptr;ptr=ptr->next)
        	if(strcmp(min,ptr->name)==0)
	  {
	  	printf("%5d%12s%9s%9d%9d%11d%11d%7d\n",ptr->num,ptr->name,ptr->kind,ptr->stime,ptr->ttime,ptr->etime,ptr->score,ptr->term);
        t=0;
	  }
	  if(t)
	  printf("\t\n 未找到！\n");
	  t=1;
	  system("pause");
	  goto L1;
	  
	  
	  case 2:printf("请输入查找课程性质:");
	  scanf("%s",type);
	  printf("课程编号  课程名称  课程性质  总学时  授课学时  实践或上机学时  学分  开课学时\n");
	  for(ptr=head;ptr;ptr=ptr->next)
	  if(strcmp(type,ptr->kind)==0)
	  {
	  	printf("%5d%12s%9s%9d%9d%11d%11d%7d\n",ptr->num,ptr->name,ptr->kind,ptr->stime,ptr->ttime,ptr->etime,ptr->score,ptr->term);
	  	t=0;
	  	}
	   if(t)
	   printf("\t\n 未找到！\n");
	   t=1;
	   system("pause");
	   goto L1;
	   
	   case 3:printf("输入要查找的课程的学分:");
	   scanf("%d",&num);
	   printf("课程编号  课程名称  课程性质  总学时  授课学时  实践或上机学时  学分  开课学时\n");	
	   for(ptr=head;ptr;ptr=ptr->next)
	  if(ptr->score==num)
	  {
	  	printf("%5d%12s%9s%9d%9d%11d%11d%7d\n",ptr->num,ptr->name,ptr->kind,ptr->stime,ptr->ttime,ptr->etime,ptr->score,ptr->term);
	  	t=0;
	  	}   
	   if(t)
	   printf("\n\t未找到！\n");
	   t=1;
	   system("pause");
	   goto L1;
	   
	   case 4:break;
}	   
		}
	//下面定义管理员板块
 void Mangers()
 {
 	int n,w=1,flag=0,i=3;
 	char s[8];
 	char password[7]="1";//密码为1
	do
	{
		printf("\n\nEnter password:");//输入密码
		scanf("%s",s);
		if(!strcmp(s,password))//密码匹配验证
		{
			flag=1;
			break;//输入正确 
		 } 
		 else
		 {
		 	printf("\n\nError!You only have %d times!Pleasa enter again:\n",i-1);
		 	i--;
		 }
	 } 
	 while(i>0);
	 if(!flag)
	 {
	 	printf("you have already entered 3 times!");//输入密码超过3次，退出
		exit(0);  
	 }
	 do
	 {
	 	system("cls");//清屏
		 puts("\n\n\t\t*************管  理  员  菜  单**************\n\n");
		  puts("\t\t\t\t1--浏览课程\n");
		  puts("\t\t\t\t2--查询课程\n");
		  puts("\t\t\t\t3--添加课程\n");
		  puts("\t\t\t\t4--删除课程\n");
		  puts("\t\t\t\t5--返回主菜单");
		  puts("\n\n\t\t******************************************\n");
		  printf("choose your number(1-5):[]\b\b");
		  scanf("%d",&n);
		  switch(n)
		   {
		   	case 1:prin();break;//浏览
			case 2:search();break;//查询
			case 3:insert();savefile();break;//添加
			case 4:del();savefile();break;//删除
			case 5:return;
			defaule:; 
		   }
	 }while(w==1);
  } 
    
//下面定义学生板块
void Students()
{
	int n,w=1;
	do
	{
		system("cls");
		puts("\n\n\t\t**********************************\n\n");
		puts("\t\t\t\t1--浏览所有课程\n");
		puts("\t\t\t\t2--查询课程信息\n");
		puts("\t\t\t\t3--选择选修课程\n");
		puts("\t\t\t\t4--浏览我选修的课程\n");
		puts("\t\t\t\t5--删除错选课程\n");
		puts("\t\t\t\t6--返回");
		puts("\n\n\t\t****************************************\n");
		printf("choose your number(1-6):[]\b\b");
		scanf("%d",&n);
		switch(n)
		{
			case 1:prin();break;//浏览 
			case 2:search();break;//查询 
			case 3:choose();break;//选择 
			case 4:prin1();break;//浏览我选修的 
			case 5:del();savefile();break;//删除错选 
			case 6:return;//返回 
			default:;
		 } 
	}
	while(w==1);
 } 
 
   
  //下面编辑主页面 
 int main()
 {
 	int n,w=1;
 	do
 	{
 		system("cls");//清除屏幕
		 puts("\n\n\t\t****************MENU****************\n\n"); 
		 puts("\t\t\t\t1.以管理员身份登录\n");
		 puts("\t\t\t\t2.以学生身份登录\n");
		 puts("\t\t\t\t3.退出");
		 puts("\n\n\t\t***********************************\n");
		 printf("Choose your number(1--3):[  ]\b\b");
		 scanf("%d",&n);
		 switch(n)
		 {
		 	case 1:Mangers();break;//选1，进入管理员系统
			case 2:Students();break;//选2，进入学生系统
			case 3:w=0;break;//选3，退出
			default:;
		  } 
	 }
	 while(w==1);
	 return 0;
 }//此部分将功能分为两个区块