yw-1113_20/学生选修课程系统设计2.c

#include "stdio.h"
#include "string.h"
#include "stdlib.h"
#include"malloc.h"
void prin1();
void choose();
typedef struct subjects
{
int num;                
char name[20];          
char kind[10];          
int stime;              
int ttime;              
int etime;              
int score;              
int term;                
struct subjects *next;
}SUB;
SUB *head=NULL;
SUB *create_form()          
{
SUB *head,*tail,*p;
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;
}
void savefile()        
{
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  实验或上机学时  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("创建后的信息已放入'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("创建后的信息已放入'3.txt'文件中\n");
system("pause");
}
void readfile()                    
{
void *myInsert(SUB*);
SUB *newSub;    
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 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  实践或上机学时  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");
}
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  开课学期\n");
while(!feof(fp))
{
ptr=(SUB*)malloc(sizeof(SUB));
fscanf(fp,"%d%s%s%d%d%d%d%d\n",&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");
}
void *myInsert(SUB *subj)  
{
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;
}
void *insert()
{
SUB *ptr,*subj;
int size=sizeof(SUB);
char ch,ch1;
while(ch!='0')
{
subj=(SUB *)malloc(size);
ptr=subj;
printf("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,新信息存入文件中\n");
printf("\n继续插入请按回车\n");
printf("\n结束添加课程按 0: [ ]\b\b");
ch1=getchar();                      
ch=getchar();
}
return head;
}
void *del()  
{
SUB *p1,*p2;
char ch,ch1;
int num;
while(ch!='0')
{
printf("输入想要删除的课程编号:[    ]\b\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继续删除请按回车\n");
printf("\n结束删除课程按 0: [ ]\b\b");
ch1=getchar();                      
ch=getchar();
printf("\n删除完毕,新信息存入文件中\n");
system("pause");
}
return head;
system("pause");
}
void choose()
{
SUB *p,*q;
int a[5];
int num,total=0,i=0,j;
printf("输入要选修的课程的编号,编号之间以空格分开\n");
scanf("%d",&num);
printf("如果确认输入完要选修的课程的编号,请输入0: [ ]\b\b");
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!\n",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*****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("\n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'3.txt'中\n");
}
system("pause");
}
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\nChiose your number(1-4):[ ]\b\b");
scanf("%d",&a);
switch(a)
{
case 1:printf("请输入要查找的课程的名称:");
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  开课学期\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("请输入要查找的课程的性质:");
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  开课学期\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  开课学期\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;
}
}
void Mangers()
{
int n,w=1,flag=0,i=3;
char s[8];
char password[7]="1";
do
{
printf("\n\nEnter password:");
scanf("%s",s);
if(!strcmp(s,password))              
{
flag=1;
break;
}
else
{
printf("\n\nError! You only have %d times! Enter again:\n",i-1);
i--;
}
}
while(i>0);
if(!flag)
{
printf("you have Enter 3 times!");      
exit(0);                                
}
do
{
system("cls");
printf("\n\n\t\t*********************管理员菜单***********************\n\n");
printf("\t\t\t\t1---浏览课程\n");
printf("\t\t\t\t2---查询课程\n");
printf("\t\t\t\t3---添加课程\n");
printf("\t\t\t\t4---删除课程\n");
printf("\t\t\t\t5---返回主菜单");
printf("\n\n\t\t******************************************************\n");
printf("Chiose your number(1-5):[ ]\b\b");
scanf("%d",&n);
switch(n)
{
case 1:prin();break;
case 2:search();break;
case 3:insert();savefile();break;
case 4:del();savefile();break;
case 5:return;
default:;
}
}
while(w==1);
}
void Students()
{
int n,w=1;
do
{
system("cls");
puts("\n\n\t\t*********************学生菜单***********************\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---返回主菜单");
puts("\n\n\t\t****************************************************\n");
printf("Chiose your number(1-6):[ ]\b\b");
scanf("%d",&n);
switch(n)
{
case 1:prin();break;
case 2:search();break;
case 3:choose();break;
case 4:prin1();break;
case 5:del();savefile1();break;
case 6:return;
default:;
}
}
while(w==1);
}
int  main()
{
int n,w=1;
do
{
system("cls");
puts("\n\n\t\t*********************MENU***********************\n\n");
puts("\t\t\t\t1.以管理员身份登录(password 1)\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("Chiose your number(1-3):[ ]\b\b");
scanf("%d",&n);
switch(n)
{
case 1:Mangers() ;break;
case 2:Students();break;
case 3:w=0;break;
default:;
}
}
while(w==1);
return 0;
}