课程选择系统代码，大神看看啊，怎么录不进信息
#include<stdio.h>#include<stdlib.h>
#include<string.h>
int N1,N2;
struct student
{
int num2;
char name2[20];
int nelenum[50]; /*所选课程编号*/
int nelen; /*所选课程学分和*/
struct student * next;
};
struct course
{
int num1; /*课程编号*/
char name1[20]; /*课程名称*/
char type[20]; /*类型，性质*/
int credit; /* 学分 */
int period; /* 课时 */
char teacher[20];
int people; /*选此门课程的人数*/
struct course *next; /*结构体指针*/
};
struct course * head1;
struct student * head2;
struct course *zhang() /*从键盘录入课程信息*/
{
char ch;
struct course *p1,*p2;
p1=p2=(struct course *)malloc(sizeof(struct course));
printf("C Numbers\tC name \tC nature\tcredits \tperiod\tteacher\n");
scanf("%d%s%s%d%d%s",&p1->num1,p1->name1,p1->type,&p1->credit,&p1->period,p1->teacher);
ch=getchar();
p1->people=0;
head1=NULL;
while(ch!=0x0b)
{
if(head1==NULL)
head1=p1;
else
p2->next=p1;
p2=p1;
p1=(struct course * )malloc(sizeof(struct course));
scanf("%d%s%s%d%d%s",&p1->num1,p1->name1,p1->type,&p1->credit,&p1->period,p1->teacher);
p1->people=0;
getchar();
ch=getchar();
}
}
void zhang1() /*从文件录入课程信息*/
{
FILE * fp;
char filepath[20];
struct course *p1,*p2;
N1=0;
printf("Please input you want to read the path of the class:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"rt"))==NULL)
{
printf("Can't find % s file!\n",filepath);
exit(0);
}
p1=p2=(struct course*)malloc(sizeof(struct course));
fread(p1,sizeof(struct course),1,fp);
head1=NULL;
while(!feof(fp))
{
N1=N1+1;
if(N1==1)
head1=p1;
else
p2->next=p1;
p2=p1;
p1=(struct course * )malloc(sizeof(struct course));
fread(p1,sizeof(struct course),1,fp);
}
p2->next=NULL;
}
void load() /*录入课程信息函数*/
{
int i;
printf("\t\t\tEntry course information\n");
printf("\n1.From the keyboard input");
printf("\n2.From file entry");
printf("\n3.To return to main menu\n");
printf("Please enter1-3:");
scanf("%d",&i);
switch(i)
{
case 1:head1=zhang();break;
case 2:zhang1();break;
case 3:break;
}
}
void insert(struct course *incourse) /*增加课程信息*/
{
struct course *p0,*p1,*p2;
p1=head1;
p0=incourse;
if(head1==NULL)
{
head1=p0;
p0->next=NULL;
}
else
{
while((p0->num1>p1->num1) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num1<=p1->num1)
{
if(head1==p1)
head1=p0;
else
p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;
}
}
N1=N1+1;
}
void delc(int num1) /*删除课程信息*/
{
struct course *p1,*p2;
if(head1==NULL)
{
printf("\nCannot delete!\n");
goto end;
}
p1=head1;
while(num1!=p1->num1 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num1==p1->num1)
{
if(p1==head1)
head1=p1->next;
else
p2->next=p1->next;
printf("deleted\n");
N1=N1-1;
}
else
printf("Without this course\n");
end:;
}
void *listc() /*浏览课程信息*/
{
struct course * p;
p=head1;
printf("C Numbers C name C nature credits period teacher Elective number\n");
while(p!=NULL)
{
printf("%6d%13s%10s%7d%7d%12s%5d\n",p->num1,p->name1,p->type,p->credit,p->period,p->teacher,p->people);
p=p->next;
}
}
void search2() /*按学分查找课程信息*/
{
int a;
struct course*p;
printf("please enter the course credit");
scanf("%d",&a);
p=head1;
printf("C Numbers C name C nature credits period teacher Elective number\n");
while(p!=NULL)
{
if(p->credit==a)
{
printf("%6d%13s%10s%7d%7d%12s%5d\n",p->num1,p->name1,p->type,p->credit,p->period,p->teacher,p->people);
}
p=p->next;
}
}
void search3() /*按性质查找课程信息*/
{
int type1[20];
struct course*p;
printf("please enter the course type:");
scanf("%s",type1);
p=head1;
printf("C Numbers C name C nature credits period teacher Elective number\n");
while(p!=NULL)
{
if(strcmp(type1,p->type)==0)
{
printf("%6d%13s%10s%7d%7d%12s%5d\n",p->num1,p->name1,p->type,p->credit,p->period,p->teacher,p->people);
}
p=p->next;
}
}
void search() /*课程信息查找函数*/
{
int i;
printf("1.According to the course credit to find\n");
printf("2.According to the course type to find\n");
printf("3.return\n");
printf("Please enter1-3:\n");
scanf("%d",&i);
switch(i)
{
case 1:search2();break;
case 2:search3();break;
case 3:break;
}
}
void managementc() /*课程信息管理函数*/
{
struct course * p1;
int i,num1;
printf("\t\t\tCourse information management\n");
printf("1.Entry course information\n");
printf("2.Add course\n");
printf("3.Delete course\n");
printf("4.Curriculum information browsing\n");
printf("5.Find students' information\n");
printf("6.return\n");
printf("Please enter1-6:\n");
scanf("%d",&i);
switch(i)
{
case 1:system("cls");load();break;
case 2:{p1=(struct course *)malloc(sizeof(struct course));
printf("C Numbers\tC name\tCourse nature\tcredits\tclass\tteacher\n");
scanf("%d%s%s%d%d%s",&p1->num1,p1->name1,p1->type,&p1->credit,&p1->period,p1->teacher);
p1->people=0;
insert(p1);
} break;
case 3:printf("Please input you want to delete the course Numbers:\n");
scanf("%d",&num1);
delc(num1); break;
case 4:listc();break;
case 5:search();break;
case 6:break;
}
}
void putin(void) /*从键盘录入学生信息*/
{
int i;
struct student *p1,*p2;
N2=0;
p1=p2=(struct student *)malloc(sizeof(struct student));
printf("Student id\tname\n");
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
head2=NULL;
while(p1->num2!=0)
{
N2=N2+1;
if(N2==1)
head2=p1;
else
p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
scanf("%d%s",&p1->num2,p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
}
p2->next=NULL;}
void putin2() /*从文件录入学生信息*/
{
FILE * fp;
char filepath[20];
struct student *p1,*p2;
N2=0;
printf("Please input you want to read the path:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"rt"))==NULL)
{
printf("Can't find % s file!\n",filepath);
exit(0);
}
p1=p2=(struct student*)malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
head2=NULL;
while(!feof(fp))
{
N2=N2+1;
if(N2==1)
head2=p1;
else
p2->next=p1;
p2=p1;
p1=(struct student * )malloc(sizeof(struct student));
fread(p1,sizeof(struct student),1,fp);
}
p2->next=NULL;
}
void input() /*录入学生信息函数*/
{
int i;
printf("\t\t\tEntering students' information\n");
printf("\n1.From the keyboard input\n");
printf("2.From file entry\n");
printf("3.To return to main menu\n");
printf("Please enter1-3:\n");
scanf("%d",&i);
switch(i)
{
case 1:putin(); break;
case 2:putin2(); break;
case 3:break;
}
}
void inserts(struct student * incouse) /*增加学生信息*/
{
struct student *p0,*p1,*p2;
p1=head2;
p0=incouse;
if(head2==NULL)
{
head2=p0;
p0->next=NULL;
}
else
{
while((p0->num2>p1->num2) && (p1->next!=NULL))
{
p2=p1;
p1=p1->next;
}
if(p0->num2 <= p1->num2)
{
if(head2==p1) head2=p0;
else p2->next=p0;
p0->next=p1;
}
else
{
p1->next=p0;
p0->next=NULL;}
}
N2=N2+1;
}
void dels(int num2) /*删除学生信息*/
{
struct student *p1,*p2;
if(head2==NULL)
{
printf("\nCannot delete\n");
goto end;
}
p1=head2;
while(num2!=p1->num2 && p1->next!=NULL)
{
p2=p1;
p1=p1->next;
}
if(num2==p1->num2)
{
if(p1==head2)
head2=p1->next;
else
p2->next=p1->next;
printf("deleted\n");
N2=N2-1;
}
else
printf("Not the student Numbers\n");
end:;
}
lists() /*浏览学生信息*/
{
struct student * p;
int a;
p=head2;
printf("S Numbers S name selected C credits Selected C Numbers\n");
while(p!=NULL)
{
printf("%6d%13s",p->num2,p->name2);
printf("%6d",p->nelen);
for(a=0;p->nelenum[a]!=0&&a<14;a++)
printf("%6d",p->nelenum[a]);
printf("\n");
p=p->next;
}
}
void managements() /*学生信息管理函数*/
{
struct student * p1;
int i,num2;
printf("\t\t\tStudent information management\n");
printf("1.Entering students' information\n");
printf("2.Add students' information\n");
printf("3.Delete student information\n");
printf("4.Students' information browsing\n");
printf("5.To return to main menu\n");
printf("Please select1-5:\n");
scanf("%d",&i);
switch(i)
{
case 1:system("cls");input();break;
case 2:{p1=(struct student *)malloc(sizeof(struct student));
p1->nelen=0;
p1->nelenum[0]=0;
printf("num\tname\n");
scanf("%d%s",&p1->num2,p1->name2);
inserts(p1);}break;
case 3:{printf("Please input you want to delete student Numbers:\n");
scanf("%d",&num2);
dels(num2);
} break;
case 4:lists();break;
case 5:break;
}
}
void elect() /*学生选课*/
{
struct student * s;
struct course * p;
int a,i,b;
printf("Please enter your student id:\n");
scanf("%d",&a);
s=head2;
while((s->num2)!=a&&s->next!=NULL) s=s->next;
if(s->num2!=a)
{
printf("Your information does not exist, please enter again:\n");
goto end;
}
if((s->nelen)>10)
{
printf("Your credit is full already");
goto end;
}
printf("Please input you want to elective course Numbers\n");
scanf("%d",&b);
for(i=0;(s->nelenum[i])!=0;i++);
s->nelenum[i]=b;
p=head1;
while((p->num1)!=b)
p=p->next;
(p->people)++;
(s->nelen)=(s->nelen)+(p->credit);
end:;
}
void back() /*学生退课*/
{
struct student * p;
struct course * p1;
int b,i,j,a;
printf("Please enter your student id:\n");
scanf("%d",&a);
p=head2;
while(p->num2!=a&&p!=NULL) p=p->next;
if(p==NULL)
printf("Your information does not exist:\n");
else
{
printf("Please input you check chosen course:\n");
scanf("%d",&b);
p1=head1;
while(p1->num1!=b) p1=p1->next;
for(i=0;p->nelenum[i]!=b;i++);
for(j=i;p->nelenum[j]!=0;j++)
p->nelenum[j]=p->nelenum[j+1];
p->nelenum[--j]=0;
(p->nelen)=(p->nelen)-(p1->credit);
(p1->people)--;
printf("succeed!\n");
}
}
void search1() /*按学生编号查找学生信息*/
{
int a,b;
struct student * p;
printf("Please enter the student Numbers");
scanf("%d",&a);
p=head2;
printf("S id S name Selected C Numbers selected C credits\n");
while(p!=NULL)
{
if(p->num2==a)
{
printf("%6d%13s ",p->num2,p->name2);
for(b=0;p->nelenum[b]!=0&&b<14;b++)
printf("%d",p->nelenum[b]);
printf("%10d\n",p->nelen);
}
p=p->next;
}
}
void elective() /*学生选课信息管理*/
{
int i;
printf("\t\t\tStudents' course selection information management\n");
printf("1.elective\n");
printf("2.Drop a course\n");
printf("3.According to the student id to find\n");
printf("4.To return to main menu\n");
printf("Please enter1-4:\n");
scanf("%d",&i);
switch(i)
{
case 1:elect();break;
case 2:back();break;
case 3:search1();break;
case 4:break;
}
}
void *intoc() /*存储课程信息*/
{
FILE * fp;
struct course * p;
char filepath[30];
printf("Input path:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"w"))==NULL)
{
printf("\Cannot store!");
exit(0);
}
p=head1;
while(p!=NULL)
{
fprintf(fp,"%d%s%s%d%d%s%d\n",p->num1,p->name1,p->type,p->credit,p->period,p->teacher,p->people);
p=p->next;
}
fclose(fp);
printf("Already stored into the file % s!\n",filepath);
}
void intos() /*存储学生信息*/
{
FILE * fp;
struct student * p;
char filepath[30];
printf("Please input the path:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"wt"))==NULL)
{
printf("\nCannot store!");
exit(0);
}
p=head2;
while(p!=NULL)
{
fwrite(p,sizeof(struct student),1,fp);
p=p->next;
}
fclose(fp);
printf("Already stored into the file % s!\n",filepath);
}
void into() /*信息存储函数*/
{
int i;
printf("\t\t\tInformation storage\n");
printf("1.Course information storage\n");
printf("2.Student information storage\n");
printf("3.To return to main menu\n");
printf("Please enter1-3\n");
scanf("%d",&i);
switch(i)
{
case(1):intoc();break;
case(2):intos();break;
case(3):break;
}
}
void main() /*主函数*/
{
char m;
int i;
start:
printf("\t\t\t***************************\n");
printf("\n\t\t\tWelcome to use this system!\n");
printf("\t\t\t***************************\n");
printf("\n");
printf("\t\tmenu:\n");
printf("\t\t\t1.Course information management\n");
printf("\t\t\t2.Student information management\n");
printf("\t\t\t3.Students' course selection\n");
printf("\t\t\t4.Information storage\n");
printf("\t\t\t5.Exit system");
printf("\t\t\t\nPlease enter1-4:\n");
scanf("%d",&i);
if(i<1 || i>5)
{
printf("Please enter a:\n");
}
if(scanf("%c",&m))
{
printf("Input error, please enter again:\n");
}
switch(i)
{
case 1:system("cls");managementc();goto start;break;
case 2:system("cls");managements();goto start;break;
case 3:system("cls");elective();goto start;break;
case 4:system("cls");into();goto start;break;
case 5:system("cls");printf("\n Thank you for your use\n Bye-Bye!\n");
}
getch();
}
