diff --git a/有bug的课设2.0.c b/有bug的课设2.0.c
new file mode 100644
index 0000000..5e61f64
--- /dev/null
+++ b/有bug的课设2.0.c
@@ -0,0 +1,492 @@
+#include<stdio.h>
+#include<string.h>
+#include<stdlib.h>
+#include<malloc.h>
+void prin1();
+void choose();
+typedef struct subjects  //¶¨Òå¿Î³ÌÐÅÏ¢½á¹¹Ìå
+{
+	int num; //¿Î³Ì±àºÅ
+	char name[20]; //¿Î³ÌÃû³Æ
+	char kind[10];//¿Î³ÌÐÔÖÊ
+	int stime;//×Üѧʱ
+	int ttime;//ÊÚ¿Îѧʱ
+	int etime;//ʵÑé»òÉÏ»úѧʱ 
+	int score;//ѧ·Ö
+	int term;//¿ª¿ÎѧÆÚ
+	struct subjects *next; 
+ } SUB;
+ SUB *head=NULL;
+  //ÏÂÃ涨ÒåÁ´±íÄ£¿é
+ SUB *create_form()
+ {
+ 	SUB *head,*tail,*p;//¶¨ÒåÍ·½Úµã£¬Î²½Úµã£¬Öмä½Úµã¡£ 
+ 	int num,stime,ttime;
+ 	int etime,score,term;
+ 	char name[20],kind[10];
+ 	int size=sizeof(SUB);
+ 	head=tail=NULL;
+ 	printf("ÊäÈëÑ¡Ð޿γÌÐÅÏ¢:\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;
+  } 
+   //±£´æÎļþÄ£¿é
+  void savefile()   //±£´æÎļþ
+  {
+  	SUB *p;
+  	FILE *fp;fp=fopen("2.txt","w");
+if(fp==NULL)exit(0);
+printf("¿Î³Ì±àºÅ  ¿Î³ÌÃû³Æ  ¿Î³ÌÐÔÖÊ  ×Üѧʱ  ÊÚ¿Îѧʱ  ʵ¼ù»òÉϼ¶Ñ§Ê±  ѧ·Ö  ¿ª¿ÎѧÆÚ\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("´´½¨ºóÐÅÏ¢ÒÑ·ÅÈë'2.txt'ÎļþÖÐ\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("´´½¨ºóÐÅÏ¢ÒÑ·ÅÈë'3.txt'ÎļþÖÐ\n");
+system("pause");
+	
+	
+}
+  //¶ÁÈ¡ÎļþÄ£¿é
+ void readfile()//ÔĶÁÎļþ
+ {
+ 	void *myInsert(SUB*);
+	 SUB *newSub;//пγÌ
+	 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);
+  } 
+  void read()
+  {
+ 	void *myInsert(SUB*);
+	 SUB *newSub;//пγÌ
+	 int num,stime,ttime,etime;
+	 int score,term;
+	 char c,name[20],kind[10],fname[20];
+	 FILE *fp;
+	 fp=fopen("3.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);
+  } 
+  //ÏÂÃ涨Òåä¯ÀÀÄ£¿é
+  void prin()
+  {
+   	SUB *ptr;
+  	head=NULL;
+  	readfile();
+  	if(head==NULL)
+  	{
+  		printf("\n\n\t**********NO RECORDS!**********\n");
+  		return;
+	  }
+	  printf("¿Î³Ì±àºÅ  ¿Î³ÌÃû³Æ  ¿Î³ÌÐÔÖÊ  ×Üѧʱ  ÊÚ¿Îѧʱ  ʵ¼ù»òÉϼ¶Ñ§Ê±  ѧ·Ö  ¿ª¿ÎѧÆÚ\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");
+   } 
+    //ÏÂÃ涨Òåä¯ÀÀÒÑÑ¡Ð޿γÌÄ£¿é
+   void prin1()
+   {
+   SUB *ptr;
+   head=NULL;
+  	read();
+  	if(head==NULL)
+  	{
+  		printf("\n\n\t**********NO RECORDS!**********\n");
+  		return;
+	  }
+	  printf("¿Î³Ì±àºÅ  ¿Î³ÌÃû³Æ  ¿Î³ÌÐÔÖÊ  ×Üѧʱ  ÊÚ¿Îѧʱ  ʵ¼ù»òÉϼ¶Ñ§Ê±  ѧ·Ö  ¿ª¿ÎѧÆÚ\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");
+}
+  
+	
+	//²åÈëÁ´±íÄ£¿é	
+	void *myInsert(SUB *subj)//Á´±í²åÈë²Ù×÷
+	{
+		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;
+	 } 
+	 
+		 //Ìí¼ÓÄ£¿é
+	 void *insert()
+	 {
+	 	SUB *ptr,*subj;
+	 	int size=sizeof(SUB);
+	 	char ch,ch1;
+	 	while(ch!='0')
+	 	{
+	 		subj=(SUB *)malloc(size);
+	 		ptr=subj;
+	 		printf("ÇëÊäÈëÒª²åÈëµÄ¿Î³ÌÐÅÏ¢:\n");
+	 		printf("\n\t\t ÇëÊäÈë¿Î³Ì±àºÅ:");
+	 		scanf("%d",&subj->num);
+	 		printf("\n\t\t ÇëÊäÈë¿Î³ÌÃû³Æ:");
+	 		scanf("%s",&subj->name);
+	 		printf("\n\t\t ÇëÊäÈë¿Î³ÌÐÔÖÊ:");
+			 scanf("%s",&subj->kind);
+			 printf("\n\t\t ÇëÊäÈë×Üѧʱ:");
+			 scanf("%d",&subj->stime);
+			 printf("\n\t\t ÇëÊäÈëÊÚ¿Îѧʱ:");
+			 scanf("%d",&subj->ttime);
+			 printf("\n\t\t ÇëÊäÈëʵ¼ù»òÉÏ»úѧʱ:");
+			 scanf("%d",&subj->etime);
+			 printf("\n\t\t ÇëÊäÈëѧ·Ö:");
+			 scanf("%d",&subj->score);
+			 printf("\n\t\t ÇëÊäÈ뿪¿ÎѧÆÚ:");
+			 scanf("%d",&subj->term);
+			 myInsert(subj);
+			 printf("\nÌí¼ÓÍê±Ï£¬ÐÂÐÅÏ¢´æÈëÎļþ¼Ð\n");
+			 printf("\n\n ¼ÌÐø²åÈëÇë°´»Ø³µ\n");
+			 printf("\n½áÊøÌí¼ÓÇë°´ 0:[ ]\b\b");
+			 ch1=getchar();
+			 ch=getchar(); 
+		 }
+		 return head;
+	  } 
+	  	  //ɾ³ýÄ£¿é
+	  void *del()
+	  {
+	  	SUB *p1,*p2;
+	  	char ch,ch1;
+	  	int num;
+	  	while(ch!='0')
+	  	{
+	  		printf("ÇëÊäÈëÏëɾ³ýµÄ¿Î³Ì±àºÅ:[   ]\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("\n¼ÌÐøɾ³ý°´»Ø³µ\n");
+			  printf("\n½áÊøɾ³ý°´ 0:[]\b\b");
+			  ch1=getchar();
+			  ch=getchar(); 
+		  }
+		  return head;
+		  system("pause");	
+	   } 
+
+//Ñ¡Ð޿γÌÄ£¿é
+void choose()
+{
+	SUB *p,*q;
+	int a[5];
+	int num,total=0,i=0,j;
+	printf("ÊäÈëÏëҪѡÐ޵Ŀγ̱àºÅ,±àºÅÖ®¼äÓÿոñ·Ö¿ª\n");
+	scanf("%d",&num);
+	printf("Èç¹ûÈ·ÈÏÊäÈëÍêҪѡµÄ±àºÅ£¬ÇëÊäÈë 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("Ñ¡ÐÞ×Üѧ·ÖΪ%d,δ´ïµ½60£¬Ñ¡ÐÞʧ°Ü£¡",total);
+		system("pause");
+	}
+	else
+	{
+		FILE*fp;
+		fp=fopen("3.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*****Ñ¡Ð޳ɹ¦£¡*******\n");
+		printf("\n ÄúÑ¡Ð޵ĿγÌ×Üѧ·ÖΪ%d,¿Î³Ì·Ö±ðΪ:\n",total);
+		printf("¿Î³Ì±àºÅ  ¿Î³ÌÃû³Æ  ¿Î³ÌÐÔÖÊ  ×Üѧʱ  ÊÚ¿Îѧʱ  ʵ¼ù»òÉϼ¶Ñ§Ê±  ѧ·Ö  ¿ª¿ÎѧÆÚ\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("\nÒÔÉÏÐÅϢȫ²¿±£´æÔÚ'3.txt'ÖÐ\n");
+		
+	}
+	system("pause");
+ } 
+ 	
+	//ÏÂÃ涨Òå²éѯ°å¿é
+	void search()
+	{
+		int a,num;
+		int t=1;
+		char type[10],min[10];
+		SUB *ptr;
+		L1:system("cls");
+		printf("\n\n\t\t***********ÇëÑ¡Ôñ²éѯ·½Ê½***********\n");
+		printf("\n\t\t\t1--°´¿Î³ÌÃû³Æ²éÕÒ\n");
+		printf("\n\t\t\t2--°´¿Î³ÌÐÔÖʲéÕÒ\n");
+		printf("\n\t\t\t3--°´Ñ§·Ö²éÕÒ\n");
+		printf("\n\t\t\t4-Í˳ö²éÕÒ\n");
+		printf("\n\n\t\t************************************\n");
+		printf("\n\nChoose your numeber(1-4):[]\b\b");
+        scanf("%d",&a); 
+        switch(a)
+        {
+        	case 1:printf("ÊäÈë²éÕҿγÌÃû:");
+        	scanf("%s",min);
+        	printf("¿Î³Ì±àºÅ  ¿Î³ÌÃû³Æ  ¿Î³ÌÐÔÖÊ  ×Üѧʱ  ÊÚ¿Îѧʱ  ʵ¼ù»òÉÏ»úѧʱ  ѧ·Ö  ¿ª¿Îѧʱ\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 δÕÒµ½£¡\n");
+	  t=1;
+	  system("pause");
+	  goto L1;
+	  
+	  
+	  case 2:printf("ÇëÊäÈë²éÕҿγÌÐÔÖÊ:");
+	  scanf("%s",type);
+	  printf("¿Î³Ì±àºÅ  ¿Î³ÌÃû³Æ  ¿Î³ÌÐÔÖÊ  ×Üѧʱ  ÊÚ¿Îѧʱ  ʵ¼ù»òÉÏ»úѧʱ  ѧ·Ö  ¿ª¿Îѧʱ\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 δÕÒµ½£¡\n");
+	   t=1;
+	   system("pause");
+	   goto L1;
+	   
+	   case 3:printf("ÊäÈëÒª²éÕҵĿγ̵Äѧ·Ö:");
+	   scanf("%d",&num);
+	   printf("¿Î³Ì±àºÅ  ¿Î³ÌÃû³Æ  ¿Î³ÌÐÔÖÊ  ×Üѧʱ  ÊÚ¿Îѧʱ  ʵ¼ù»òÉÏ»úѧʱ  ѧ·Ö  ¿ª¿Îѧʱ\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\tδÕÒµ½£¡\n");
+	   t=1;
+	   system("pause");
+	   goto L1;
+	   
+	   case 4:break;
+}	   
+		}
+	//ÏÂÃ涨Òå¹ÜÀíÔ±°å¿é
+ void Mangers()
+ {
+ 	int n,w=1,flag=0,i=3;
+ 	char s[8];
+ 	char password[7]="1";//ÃÜÂëΪ1
+	do
+	{
+		printf("\n\nEnter password:");//ÊäÈëÃÜÂë
+		scanf("%s",s);
+		if(!strcmp(s,password))//ÃÜÂëÆ¥ÅäÑéÖ¤
+		{
+			flag=1;
+			break;//ÊäÈëÕýÈ· 
+		 } 
+		 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!");//ÊäÈëÃÜÂ볬¹ý3´Î£¬Í˳ö
+		exit(0);  
+	 }
+	 do
+	 {
+	 	system("cls");//ÇåÆÁ
+		 puts("\n\n\t\t*************¹Ü  Àí  Ô±  ²Ë  µ¥**************\n\n");
+		  puts("\t\t\t\t1--ä¯ÀÀ¿Î³Ì\n");
+		  puts("\t\t\t\t2--²éѯ¿Î³Ì\n");
+		  puts("\t\t\t\t3--Ìí¼Ó¿Î³Ì\n");
+		  puts("\t\t\t\t4--ɾ³ý¿Î³Ì\n");
+		  puts("\t\t\t\t5--·µ»ØÖ÷²Ëµ¥");
+		  puts("\n\n\t\t******************************************\n");
+		  printf("choose your number(1-5):[]\b\b");
+		  scanf("%d",&n);
+		  switch(n)
+		   {
+		   	case 1:prin();break;//ä¯ÀÀ
+			case 2:search();break;//²éѯ
+			case 3:insert();savefile();break;//Ìí¼Ó
+			case 4:del();savefile();break;//ɾ³ý
+			case 5:return;
+			default:; 
+		   }
+	 }while(w==1);
+  } 
+    
+//ÏÂÃ涨ÒåѧÉú°å¿é
+void Students()
+{
+	int n,w=1;
+	do
+	{
+		system("cls");
+		puts("\n\n\t\t**********************************\n\n");
+		puts("\t\t\t\t1--ä¯ÀÀËùÓпγÌ\n");
+		puts("\t\t\t\t2--²éѯ¿Î³ÌÐÅÏ¢\n");
+		puts("\t\t\t\t3--Ñ¡ÔñÑ¡Ð޿γÌ\n");
+		puts("\t\t\t\t4--ä¯ÀÀÎÒÑ¡Ð޵ĿγÌ\n");
+		puts("\t\t\t\t5--ɾ³ý´íÑ¡¿Î³Ì\n");
+		puts("\t\t\t\t6--·µ»Ø");
+		puts("\n\n\t\t****************************************\n");
+		printf("choose your number(1-6):[]\b\b");
+		scanf("%d",&n);
+		switch(n)
+		{
+			case 1:prin();break;//ä¯ÀÀ 
+			case 2:search();break;//²éѯ 
+			case 3:choose();break;//Ñ¡Ôñ 
+			case 4:prin1();break;//ä¯ÀÀÎÒÑ¡ÐÞµÄ 
+			case 5:del();savefile();break;//ɾ³ý´íÑ¡ 
+			case 6:return;//·µ»Ø 
+			default:;
+		 } 
+	}
+	while(w==1);
+ } 
+ 
+   
+  //ÏÂÃæ±à¼­Ö÷Ò³Ãæ 
+ int main()
+ {
+ 	int n,w=1;
+ 	do
+ 	{
+ 		system("cls");//Çå³ýÆÁÄ»
+		 puts("\n\n\t\t****************MENU****************\n\n"); 
+		 puts("\t\t\t\t1.ÒÔ¹ÜÀíÔ±Éí·ÝµÇ¼\n");
+		 puts("\t\t\t\t2.ÒÔѧÉúÉí·ÝµÇ¼\n");
+		 puts("\t\t\t\t3.Í˳ö");
+		 puts("\n\n\t\t***********************************\n");
+		 printf("Choose your number(1--3):[  ]\b\b");
+		 scanf("%d",&n);
+		 switch(n)
+		 {
+		 	case 1:Mangers();break;//Ñ¡1£¬½øÈë¹ÜÀíԱϵͳ
+			case 2:Students();break;//Ñ¡2£¬½øÈëѧÉúϵͳ
+			case 3:w=0;break;//Ñ¡3£¬Í˳ö
+			default:;
+		  } 
+	 }
+	 while(w==1);
+	 return 0;
+ }
+ 
+
+ 
+ 
+ 
+ 
+  
+  
+
+ 
+
+ 
+
+   
+  
+
+
+
+
+