学生选课系统及学籍管理

1、 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<stdio.h>#include<stdlib.h>#include<string.h>int courcenum,studentnum;/课程的结构体struct cource int num,credit,maxnum,selectednum; char courceName30; struct cource * next;cource;/学生

2、的结构体struct student char studentname20; int selectednum,selectedcredit,num; int cource10; 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

3、件中读取已保存的学生数据 system("cls");run: for(j =0;j < 80;j+) printf("*"); printf("nnn1.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 nnn"); for(j =0;j < 80;j+) printf("*"); printf("请

4、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"); xu

5、ankecaidan();/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")=NUL

6、L)/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-&g

7、t;selectednum); 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,&am

8、p;p1->maxnum,&p1->selectednum); p2->next=NULL;void getstudent() char bianhao20;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 f

9、ile%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->selectedcredit);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

10、字符串，delim为分隔符字符串。i=0;while(cba) p1->courcei=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-&g

11、t;num,p1->studentname,&p1->selectednum,bianhao,&p1->selectedcredit);cba=strtok(bianhao,fgzf);i=0;while(cba) p1->courcei=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')&&(*st

12、r<='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,"%dt%st%dt%dt%dn",c->num,c->courceName,c->credit

13、,c->maxnum,c->selectednum); 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 fgzf2=""int i;s=studenthead;while(s!=NULL && s-

14、>num!=NULL) char outcource15=""for(i=0;i<s->selectednum;i+) char temp20;if(i=0) itoa(s->courcei,temp,10);strcat(outcource,temp);else strcat(outcource,fgzf);itoa(s->courcei,temp,10);strcat(outcource,temp);if(s->selectednum=0)strcat(outcource,"0");fprintf(fp,"

15、;%dt%st%dt%st%dn",s->num,s->studentname,s->selectednum,outcource,s->selectedcredit);s=s->next; fclose(fp); printf("okn",filepath);void save() setcource();setstudent();void viewstudent() struct student * s;char fgzf2=""int i;system("cls");s=studenthea

16、d;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 outcource15=""for(i=0;i<s->selectednum;i+) char temp20;if(i=0)itoa(s->courcei,temp,10);strcat(outcource,temp);elsestrcat(outcource,fgzf);itoa(s

17、->courcei,temp,10);strcat(outcource,temp);printf("%-16d%-16s%-16d%-16s%-10dn",s->num,s->studentname,s->selectednum,outcource,s->selectedcredit);s=s->next;for(j =0;j < 80;j+) printf("*");void viewcource() system("cls"); struct cource * c;c=courcehead

18、;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%-10dn",c->num,c->courceName,c->credit,c->maxnum,c->selectednum);c=c->next;void zengjia(struct student * newstudent) struct student *p0,*p1,*p2; p1=studenthead; p0=newstudent; if(stude

19、nthead=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-&

20、gt;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 < 8

21、0;j+) printf("*"); scanf("%d",&i); if(i = 1) system("cls"); newstudent=(struct student *)malloc(sizeof(struct student); newstudent->selectednum=0; newstudent->cource0=0; printf("学号 姓名 n"); scanf("%d %s",&newstudent->num,newstudent-&g

22、t;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("*");

23、 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;

24、s->courcei>0;i+) if(num=s->courcei) 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->courcei=num;/刷新数据 (s->selectednum)+;s->selectedcredit+=c->credit;(c->selectednum)+;save();printf("选课成功n");end:;void tui

25、xuan(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) c=c->next;if(c->num!=num) printf("输入有误n");goto run;for(i=0;s->cource

26、i!=num;i+) if(i>=s->selectednum) printf("您还没选此课程n");goto run; for(j=i;s->courcej>0;j+) s->courcej=s->courcej+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;

27、 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

28、!=num) printf("没有此人！n"); goto end; system("cls"); c=courcehead; 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%-10dn",c->

29、;num,c->courceName,c->credit,c->maxnum,c->selectednum); 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");

30、 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) pr

31、intf("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->courcei>0)&&(i<5);i+) printf("%dn",s->courcei); printf("n是否退课?y/n"); getchar(); e=getchar(); while(e=

32、9;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