学生选课系统及学籍管理

综合设计题目：学籍管理及选课系统课程名称： C语言高级程序及设计

学院：自动化

专业班级： 12电力4班

学号：

姓名：郑程鹏

联系方式：

任课老师：王星华

2014年12月3日

#include

#include

#include

int courcenum,studentnum;

//课程的结构体

struct cource

{

int num,credit,maxnum,selectednum;

char courceName[30];

struct cource * next;

}cource;

//学生的结构体

struct student

{

char studentname[20];

int selectednum,selectedcredit,num;

int cource[10];

struct student * next;

}student;

//指针链表的头

struct cource * courcehead;

struct student * studenthead;

int j;

void main()

{

void getcource();

void getstudent();

int i;//作为获取用户的输入的变量

getcource();//从文件中读取已保存的课程数据

getstudent();//从文件中读取已保存的学生数据system("cls");

run:

for(j =0;j < 80;j++) printf("*");

printf("\n\n\n1.查看课程");

printf("2.查看管理学生");

printf("3.查看选课");

printf("4.选课情况");

printf("5.退出系统\n\n\n");

for(j =0;j < 80;j++) printf("*");

printf("请输入您的选择：");

scanf("%d",&i);

if(i < 1 || i > 5)

{

printf(" 输入有误\n");

goto run;

}

if(i == 1)

{

system("cls");//清屏函数，清楚屏幕所有的东西

viewcource();//查看课程的函数

goto run;

}

else if(i == 2)

{

system("cls");

manage();//管理学生的函数

goto run;

}

else if(i == 3)

{

system("cls");

xuankecaidan();//选课的函数

goto run;

}

else if(i == 4)

{

system("cls");

sortstudent();//查看选课情况的函数

goto run;

}

else if(i == 5)

{

system("cls");

}

}

void getcource()

{

FILE * fp;

struct cource *p1,*p2;

courcenum=0;

char filepath[] = "cource.txt";//默认txt文件在当前目录下

if((fp=fopen(filepath,"r"))==NULL)//以只读的方式打开文件

{

//无法打开文件的时候

printf("error to find cource file%s!\n",filepath);

exit(0);

}

//生成struct cource大小的内存并让p1,p2指向

p1=p2=(struct cource*)malloc(sizeof(struct cource));

//从文件中读取

fscanf(fp,"%d%s%d%d%d",&p1->num,p1->courceName,&p1->credit,&p1->maxnum,&p1->select ednum);

courcehead=NULL;

while(!feof(fp))//循环读取直到读到文件结尾

{

courcenum=courcenum+1;

//读取第一个课程的时候情况不同

if(courcenum==1) courcehead=p1;

else p2->next=p1;

p2=p1;

p1=(struct cource * )malloc(sizeof(struct cource));

fscanf(fp,"%d%s%d%d%d",&p1->num,p1->courceName,&p1->credit,&p1->maxnum,&p1->select ednum);

}

p2->next=NULL;

}

void getstudent()

{

char bianhao[20];

char * fgzf = ";";

char * cba;

int i;

FILE * fp;

struct student *p1,*p2;

courcenum=0;

char filepath[] = "student.txt";

if((fp=fopen(filepath,"r"))==NULL)

{

printf("error to find student file%s!\n",filepath);

exit(0);

}

p1=p2=(struct student*)malloc(sizeof(struct student));

fscanf(fp,"%d%s%d%s%d",&p1->num,p1->studentname,&p1->selectednum,bianhao,&p1->select edcredit);

cba=strtok(bianhao,fgzf);//char *strtok(char s[], const char *delim);分解字符串为一组字符串。s为要分解的字符串，delim为分隔符字符串。

i=0;

while(cba)

{

p1->cource[i]=change(cba);

cba=strtok(NULL,fgzf);

i++;

}

studenthead=NULL;

while(!feof(fp))

{

studentnum=studentnum+1;

if(studentnum==1) studenthead=p1;

else p2->next=p1;

p2=p1;

p1=(struct student * )malloc(sizeof(struct student));

fscanf(fp,"%d%s%d%s%d",&p1->num,p1->studentname,&p1->selectednum,bianhao,&p1->select edcredit);

cba=strtok(bianhao,fgzf);

i=0;

while(cba)

{

p1->cource[i]=change(cba);

cba=strtok(NULL,fgzf);

i++;

}}

p2->next=NULL;

}

int change(char *str)

{

int v=0;

do

{

v=10*v+*str-'0';

str++;

}

while((*str>='0')&&(*str<='9'));

return v;

}

void setcource()

{

FILE * fp;

struct cource * c;

char filepath[] = "cource.txt";

if((fp=fopen(filepath,"w"))==NULL)

{

printf("\nfail");

exit(0);

}

c=courcehead;

while(c!=NULL)

{

fprintf(fp,"%d\t%s\t%d\t%d\t%d\n",c->num,c->courceName,c->credit,c->maxnum,c->selectednu m);

c=c->next;

}

fclose(fp);

}

void setstudent()

{

FILE * fp;

struct student * s;

char filepath[] = "student.txt";

if((fp=fopen(filepath,"w"))==NULL)

{printf("\nnot save");

exit(0);

}

char fgzf[2]=";";

int i;

s=studenthead;

while(s!=NULL && s->num!=NULL)

{

char outcource[15]="";

for(i=0;iselectednum;i++)

{

char temp[20];

if(i==0)

{

itoa(s->cource[i],temp,10);

strcat(outcource,temp);

}

else

{

strcat(outcource,fgzf);

itoa(s->cource[i],temp,10);

strcat(outcource,temp);

}}

if(s->selectednum==0)

strcat(outcource,"0");

fprintf(fp,"%d\t%s\t%d\t%s\t%d\n",s->num,s->studentname,s->selectednum,outcource,s->s electedcredit);

s=s->next;

}

fclose(fp);

printf("ok\n",filepath);

}

void save()

{

setcource();

setstudent();

}

void viewstudent()

{

struct student * s;

char fgzf[2]=";";

int i;

system("cls");

s=studenthead;

for(j =0;j < 80;j++) printf("*");

printf("学号姓名已选课程数已选课程序号总学分\n");

while(s!=NULL && s->num!=NULL)

{

char outcource[15]="";

for(i=0;iselectednum;i++)

{

char temp[20];

if(i==0)

{itoa(s->cource[i],temp,10);

strcat(outcource,temp);

}

else

{strcat(outcource,fgzf);

itoa(s->cource[i],temp,10);

strcat(outcource,temp);

}}

printf("%-16d%-16s%-16d%-16s%-10d\n",s->num,s->studentname,s->selectednum,outcourc e,s->selectedcredit);

s=s->next;

}

for(j =0;j < 80;j++) printf("*");

}

void viewcource()

{

system("cls");

struct cource * c;

c=courcehead;

printf("课程序号课程名称学分最大人数已选人数\n");

while(c!=NULL)

{

printf("%-16d%-16s%-10d%-16d%-10d\n",c->num,c->courceName,c->credit,c->maxnum,c->selec tednum);

c=c->next;

}}

void zengjia(struct student * newstudent)

{

struct student *p0,*p1,*p2;

p1=studenthead;

p0=newstudent;

if(studenthead==NULL)

{

studenthead=p0;

p0->next=NULL;

}

else

{while((p0->num > p1->num) && (p1->next!=NULL)) {

p2=p1;

p1=p1->next;

}

if(p0->num == p1->num)

{

printf("您所输入的学号重复\n");

goto end;

}

if(p0->num < p1->num)

{

if(studenthead==p1)

studenthead=p0;

else p2->next=p0;

p0->next=p1;

}

else

{

p1->next=p0;

p0->next=NULL;

}}

studentnum=studentnum+1;

save();

end: ;

}

void manage()

{

struct student * newstudent;

int i,num;

run:

for(j =0;j < 80;j++) printf("*");

printf("1.添加新学生\n");

printf("2.查看已存在的学生资料\n");

printf("3.返回\n");

for(j =0;j < 80;j++) printf("*");

scanf("%d",&i);

if(i == 1)

{

system("cls");

newstudent=(struct student *)malloc(sizeof(struct student));

newstudent->selectednum=0;

newstudent->cource[0]=0;

printf("学号姓名\n");

scanf("%d %s",&newstudent->num,newstudent->studentname);

newstudent->selectedcredit=0;

zengjia(newstudent);

system("cls");

goto run;

}

else if(i == 2)

{

viewstudent();

goto run;

}

else if(i == 3)

{

system("cls");

}

}

void xuanke(struct student * s)

{

struct cource * c;

int num,i,j=0;

run:

for(j =0;j < 80;j++) printf("*");

printf("请输入课程序号,返回请输入9.\n");

scanf("%d",&num);

if(num==0)

{

goto end;

}

c=courcehead;

while(c->num!=num && c->next!=NULL)

{

c=c->next;

}

if(c->num!=num)

{

printf("输入有误\n");

goto run;

}

if(c->maxnum==c->selectednum)

{

printf("该课程人数已爆满\n");

goto run;

}

for(i=0;s->cource[i]>0;i++)

{

if(num==s->cource[i])

{

printf("不能重复选课\n");

goto run;

}

}

if(s->selectednum>=5)

{

printf("所选课程数已达5门\n");

goto end;

}

s->cource[i]=num;//刷新数据

(s->selectednum)++;

s->selectedcredit+=c->credit;

(c->selectednum)++;

save();

printf("选课成功\n");

end:;

}

void tuixuan(struct student * s)

{

struct cource * c;

int num,i,j=0;

run:printf("课程序号(返回请按9回车):\n");

scanf("%d",&num);

if(num==9)

{

goto end;

}

c=courcehead;

while(c->num!=num && c->next!=NULL)

{

}

if(c->num!=num)

{

printf("输入有误\n");

goto run;

}

for(i=0;s->cource[i]!=num;i++)

{

if(i>=s->selectednum)

{

printf("您还没选此课程\n");

goto run;

}}

for(j=i;s->cource[j]>0;j++)

s->cource[j]=s->cource[j+1];

s->cource[--j]=0;

s->selectednum--;

s->selectedcredit-=c->credit;

(c->selectednum)--;

save();

printf("已退选该课程\n");

end:;

}

void chaxunkexuan()

{

char e;

struct cource * c;

struct student * s;for(j =0;j < 80;j++) printf("*");

int num,j=0;

system("cls");

printf("请输入学号:\n");

scanf("%d",&num);

system("cls");

s=studenthead;

while(s->num!=num && s->next!=NULL) s=s->next;

if(s->num!=num)

{

printf("没有此人！\n");

goto end;

}

system("cls");

for(j =0;j < 80;j++) printf("*");

printf("可选课程:\n");

printf("序号课程学分人数上限已选人数\n");

while(c!=NULL)

{if(c->maxnum!=c->selectednum)

{printf("%-16d%-16s%-10d%-16d%-10d\n",c->num,c->courceName,c->credit,c->maxnum,c->sele ctednum);

j++;

}

c=c->next;

}

if(j==0)

{

printf("课程已被选完\n");

goto end;

}

for(j =0;j < 80;j++) printf("*");

printf("\n是否选课y/n?:\n");

getchar();

e=getchar();

while(e=='y')

{

xuanke(s);

printf("\n继续选课y/n?:\n");

getchar();

e=getchar();

}

system("cls");

end:;

}

void chaxunyixuan()

{

char e;

struct student * s;

int num,i;

system("cls");

printf("请输入学号:\n");

scanf("%d",&num);

s=studenthead;

while(s->num!=num && s->next!=NULL) s=s->next;

if(s->num!=num)

{

printf("无此人\n");

goto end;

}

system("cls");

printf("已选课程序号:\n");

if(s->cource==0)

{

printf("没选课\n");

goto end;

}

for(i=0;(s->cource[i]>0)&&(i<5);i++)

{

printf("%d\n",s->cource[i]);

}

printf("\n是否退课?y/n");

getchar();

e=getchar();

while(e=='y')

{

tuixuan(s);

printf("\n继续退课?y/n");

getchar();

e=getchar();

system("cls");

}

end:;

}

struct student *sort(struct student *head)

{

struct student *zhijiecharu;

struct student *t;

struct student *p;

struct student *q;

zhijiecharu = head->next;

head->next = NULL;

while (zhijiecharu != NULL)

{

for (t = zhijiecharu, q = head; ((q!= NULL) && (q->selectedcredit < t->selectedcredit)); p = q, q = q->next);

zhijiecharu = zhijiecharu->next;

if (q == head)

{

head = t;

}

else

{

p->next = t;

}

t->next = q;

}

return head;

}

void sortstudent()

{

struct student *newstudenthead,*p,*temp=(struct student * )malloc(sizeof(struct student));

if(studenthead==NULL)

{

printf("尚未进行选课\n");

exit(0);

}

newstudenthead=studenthead;

p = sort(newstudenthead);

char fgzf[2]=";";

int i;

for(j =0;j < 80;j++) printf("*");

printf("学生序号学生姓名已选课程数量已选序号已选总学分\n");

while(p!=NULL && p->num!=NULL)

{

char outcource[15]="";

for(i=0;iselectednum;i++)

{

char temp[20];

if(i==0)

{

itoa(p->cource[i],temp,10);

strcat(outcource,temp);

}

else

{

strcat(outcource,fgzf);

itoa(p->cource[i],temp,10);

strcat(outcource,temp);

}

}

printf("%-16d%-16s%-16d%-16s%-10d\n",p->num,p->studentname,p->selectednum,outcour ce,p->selectedcredit);

p=p->next;

}

}

void xuankecaidan()

{

int i;

for(j =0;j < 80;j++) printf("*");

printf("1.可选课程\n");

printf("2.已选课程\n");

printf("3.返回\n");

for(j =0;j < 80;j++) printf("*");

scanf("%d",&i);

switch(i)

{

case(1):chaxunkexuan();break;

case(2):chaxunyixuan();break;

case(3):system("cls");break;

}}