C语言学生选课系统

1、#i nclude<stdio.h>#in clude<stdlib.h>#i nclude<stri ng.h>int N1,N2;struct stude ntint nu m2;char name220;int n ele nu m50;int n ele n;struct stude nt * n ext;struct course/所选课程编号/所选课程学分和int numl;/ 课程编char name120;char major20;char type20;int credit;int period;char teacher20;int peo

2、ple;struct course *n ext;struct course * headl;struct stude nt * head2;void zha ng()struct course *p1,*p2;/选此门课程的人数/结构体指针/从键盘录入课程信息N1=0;p1=p2=(struct course *)malloc(sizeof(struct course);printf("课程编号t课程名称t主修t课程性质t学分t课时t教师 n");sea nf("%d%s%s%s%d%d%s",&p1-> nu m1,p1-> na

3、me1,p1->major,p1->type, &p1->credit，&p1->period,p1->teacher);p1->people=0; head 仁NULL;while(p1-> nu m1!=0)N1= N1+1;if(N1=1)head 1= p1;else p2->n ext=p1;p2=p1;p1=(struct course * )malloc(sizeof(struct course);sea nf("%d%s%s%s%d%d%s",&p1-> nu m1,p1->

4、 name1,p1->major,p1->type, &p1->credit，&p1->period,p1->teacher);p1->people=0;p2-> next=NULL;void zhang1()/从文件录入课程信息FILE * fp;char filepath20;struct course *p1,*p2;N仁0;printf("请输入您要读取的路径:");getchar();gets(filepath);if(fp=fope n(filepath,"r")=NULL)print

5、f(” 找不到 %s 文件!n",filepath);exit(O);p1=p2=(struct course*)malloc(sizeof(struct course);fsca nf(fp,"%d%s%s%s%d%d%s%d",&p1-> num1,p1-> name1,p1->major,p1-> type，&p1->credit，&p1->period,p1->teacher,&p1->people);while(!feof(fp)N1= N1+1;if(N1=1)head仁p

6、1;elsep2->n ext=p1;p2=p1;p1=(struct course * )malloc(sizeof(struct course);fsca nf(fp,"%d%s%s%s%d%d%s%d",&p1-> num1,p1-> name1,p1->major,p1-> type，&p1->credit，&p1->period,p1->teacher,&p1->people);p2-> next=NULL;void load()/录入课程信息函数int i;printf(

7、"ttt录入课程信息 n");printf("n1.从键盘录入");printf("n2.从文件录入");printf("n3.返回主菜单 n");printf("请选择 1-3:");sea nf("%d",&i);switch(i)case 1: zha ng();break;case 2:zha ng1();break;case 3:break;void insert(struct course *incourse)/ 增加课程信息struct course *

8、p0,*p1,*p2;p1=head1;pO=in course;if(head1=NULL)head1=p0;p0-> next=NULL;elsewhile(p0->num1>p1->num1) && (p1->next!=NULL)p2=p1；p1=p1- >n ext;if(p0->nu m1<=p1- >nu m1)if(head 1=p1)head 1=p0;elsep2->n ext=p0;pO->n ext=p1;elsep1- >n ext=pO;pO->n ext=NULL;N1=

9、 N1+1;void delc(i nt numl)/ 删除课程信息struct course *p1,*p2;if(head1=NULL)printf("n无法删除!n");goto end;p1=head1;while(num1!=p1->num1 && p1->next!=NULL)p2=p1；p1=p1- >n ext;if(nu m1=p1- >nu m1)if(p1=head1)head仁p1- >n ext;elsep2->n ext=p1- >n ext;printf("已删除 n"

10、;);N1= N1-1;elseprintf("没有此课程n");en d:;void managementc()/课程信息管理函数struct course * p1;int i,nu m1;printf("ttt课程信息管理 n");printf("1.添加课程 n");printf("2.删除课程 n");printf("3.返回 n");printf("请输入 1-3:n");sca nf("%d",&i);switch(i)case 1:

11、p1=(struct course *)malloc(sizeof(struct course);printf("课程编号t课程名称t主修t课程性质t学分t课时t教师 n");sca nf("%d%s%s%s%d%d%s",&p1-> num1,p1-> name1,p1->major,p1->type, &p1->credit，&p1->period,p1->teacher);p1->people=0;in sert(p1); break;case 2:printf("请

12、输入您要删除的课程编号:n");scan f("%d",&n um1);delc (nu m1);break;case 3:break;void putin(void)/从键盘录入学生信息int i;struct stude nt *p1,*p2;N2=0;p1=p2=(struct stude nt *)malloc(sizeof(struct stude nt); printf("学号t 姓名 n");sca nf("%d%s",&p1-> nu m2,p1-> name2);p1- >

13、n ele n=0;for(i=0;i<20;i+) p1->nelenumi=0;head2=NULL;while(p1-> nu m2!=0)N2=N2+1;if(N2=1)head2=p1;elsep2->n ext=p1;p2=p1;p1=(struct stude nt * )malloc(sizeof(struct stude nt);scan f("%d%s",&p1-> num2,p1-> name2);p1- >n ele n=0;for(i=0;i<20;i+) p1-> nele numi=

14、0;p2-> next=NULL;void putin2()/从文件录入学生信息int i=0;FILE * fp;char filepath20;struct stude nt *p1,*p2;N2=0;printf("请输入您要读取的路径：")；getchar();gets(filepath);if(fp=fope n(filepath,"rt")=NULL)printf("找不到 %s 文件!n",filepath);exit(0);p1=p2=(struct stude nt*)malloc(sizeof(struct

15、stude nt);fread(p1,sizeof(struct stude nt),1,fp);head2=NULL;while(!feof(fp)i=0;N2=N2+1;if(N2=1)head2=p1;elsep2->n ext=p1;p2=p1;p1=(struct stude nt * )malloc(sizeof(struct stude nt); fread(p1,sizeof(struct stude nt),1,fp);p2-> next=NULL;void in put()/录入学生信息函数int i;printf("ttt 录入学生信息 n"

16、;);printf("n1.从键盘录入 n");printf("2.从文件录入n");printf("3.返回主菜单n");printf("请输入 1-3:n");sea nf("%d",&i);switch(i)ease 1:puti n();break;ease 2:put in 2();break;ease 3:break;/增加学生信息void in serts(struct stude nt * in eouse)struet stude nt *p0,*p1,*p2;p仁 h

17、ead2;p0=in eouse;if(head2=NULL)head2=p0; p0->n ext=NULL;elsewhile(p0->num2>p1->num2) && (p1->next!=NULL)p2=p1; p1=p1- >n ext;if(p0->num2 <= p1->num2)if(head2=p1) head2=p0;else p2->n ext=p0;p0->n ext=p1;elsep1- >n ext=p0;p0-> next=NULL;N2=N2+1;void dels(

18、i nt num2)/ 删除学生信息struct stude nt *p1,*p2;if(head2=NULL)prin tf("n 无法删除 n");goto end;p仁 head2;while(num2!=p1->num2 && p1->next!=NULL)p2=p1；p1=p1- >n ext;if(nu m2=p1- >nu m2)if(p1=head2)head2=p1- >n ext;elsep2->n ext=p1- >n ext;printf("已删除 n");N2=N2-1;

19、elseprintf("没有此学生编号n");en d:;void man ageme nts()/学生信息管理函数struct stude nt * p1;int i,nu m2;printf("ttt学生信息管理 n");printf("1.添加学生信息n");printf("2.删除学生信息n");printf("3.返回主菜单n");printf("请选择 1-3:n");sca nf("%d",&i);switch(i)case 1:p1

20、=(struct student *)malloc(sizeof(struct student);p1- >n ele n=0;p1-> nele num0=0;prin tf(" numtn amen");scan f("%d%s",&p1-> num2,p1-> name2);in serts(p1);break;case 2:printf("请输入您要删除的学生编号:n");scan f("%d",&n um2);dels( nu m2); break;case 3:b

21、reak;void elect()/ 学生选课struct stude nt * s;struct course * p;int a,i,b;printf("请输入您的学号:n");sca nf("%d",&a);s=head2;while(s-> nu m2)!=a&&s-> next!=NULL) s=s-> next;if(s->nu m2!=a)printf("您的信息不存在，请重新输入:n");goto end;if(s-> nele n)>10)printf(&q

22、uot;您的学分已满");goto end;printf("请输入您要选修的课程编号n");sca nf("%d",&b);for(i=0;(s->n ele nu mi)=0;i+);s->n ele nu mi=b;p=head1;while(p->nu m1)!=b)p=p->n ext;for(i=0;(s->n ele nu mi)!=0;i+);s->n ele nu mi=b;(p->people)+;(s->n ele n)=(s->n ele n)+(p->c

23、redit); (p->people)+;en d:;void back()/学生退课struct stude nt * p;struct course * p1;int b,i,j,a;printf("请输入您的学号:n");sca nf("%d",&a);p=head2;while(p-> num2!=a&&p!=NULL) p=p-> next; if(p=NULL)printf("您的信息不存在:n");elseprintf("请输入您要退选的课程:n"); sca

24、n f("%d",&b);p1=head1;while(p1- >nu m1!=b) p1=p1- >n ext; for(i=0;p->n ele nu mi!=b;i+);for(j=i;p->n ele nu mj!=O;j+)p->n ele nu mj=p->n ele nu mj+1;p->n ele num -j=0;(p->n ele n)=(p->n ele n)-(p1->credit); (p1->people)-;prin tf("succeed!n");v

25、oid elective()/学生选课信息管理int i;printf("ttt学生选课信息管理n");printf("1.选课n");printf("2.退课n");printf("3.返回主菜单n");printf("请输入 1-3:n");sea nf("%d",&i);switch(i)ease 1:elect();break;ease 2:baek();break;ease 3:break;void liste()/浏览课程信息struet eourse *

26、 p;p=head1;课时printf("课程编号课程名称主修课程性质学分教师选课人数n");while(p!=NULL)prin tf("%6d%13s%13s%10s%7d%7d%12s%5dn",p-> num1,p->n ame1,p ->major,p->type,p->credit,p->period,p->teacher,p->people);p=p->n ext;void lists()/浏览学生信息struct stude nt * p;int a;所选课程学分n");p=

27、head2;printf("学生编号 学生姓名所选课程编号while(p!=NULL)prin tf("%6d%13s",p-> num2,p-> name2);prin tf("%6d",p-> nele n);for(a=0;p->n ele numa!=O&&a<14;a+)prin tf("%d",p-> nele nu ma);prin tf("n");p=p->n ext;void intoc()/存储课程信息FILE * fp;str

28、uct course * p;char filepath30;printf("输入路径:");getchar();gets(filepath);if(fp=fope n(filepath,"w")=NULL)无法储存!");exit(O);p=head1;while(p!=NULL)fprin tf(fp,"%d%s%s%s%d%d%s%dn",p-> num1,p-> name1,p->major,p- >type,p->credit,p->period,p->teacher,p-

29、>people);p=p->n ext;fclose(fp);printf("已储存入 %s 文件!n",filepath);void intos()/存储学生信息FILE * fp;struct stude nt * p;char filepath30;printf("请输入路径:");getchar();gets(filepath);if(fp=fope n(filepath,"wt")=NULL)printf("n无法储存!");exit(0);p=head2;while(p!=NULL)fwri

30、te(p,sizeof(struct stude nt),1,fp);p=p->n ext;fclose(fp);printf("已储存入 %s 文件!n",filepath);void into()/信息存储函数int i;printf("ttt信息存储 n");printf("1.课程信息存储n");printf("2.学生信息存储tn");printf("3.返回主菜单n");printf("请输入 1-3n");sea nf("%d",&am

31、p;i);switch(i)ease(1):i ntoc();break;case(2):i ntos();break; ease(3):break;/信息存储浏览函数void store()int i;printf("tt信息存储和浏览n");printf("1.课程信息浏览n");printf("2.学生信息浏览n");printf("3.信息存储 n");printf("4.返回主菜单n");printf("请输入 1-4:n");sca nf("%d&quo

32、t;,&i);switch(i)case(1):listc();break;case(2):lists();break;case(3):i nto();break;case(4):break;void search1()/按学生编号查找学生信息int a,b;struct stude nt * p;printf("请输入学生编号");sca nf("%d",&a);p=head2;printf("学号学生姓名所选课程编号所选课程学分n");while(p!=NULL)if(p->nu m2=a)printf(&q

33、uot;%6d%13s ",p->num2,p->name2);for(b=0;p-> nele numb!=0&&b<14;b+)prin tf("%d",p-> nele nu mb);prin tf("%10dn",p-> nele n);p=p->n ext;void search2()/按学生姓名查找学生信息int b;char n ame20;struct stude nt * p;printf("请输入要查找的学生姓名:");sca nf("%

34、s", name);p=head2;printf("学号学生姓名所选课程编号所选课程学分n");while(p!=NULL)if(strcmp( name,p->n ame2)=0)printf("%6d%13s ",p->num2,p->name2); for(b=0;p-> nele numb!=0&&b<14;b+) prin tf("%d",p-> nele nu mb);prin tf("%10dn",p-> nele n);p=p->n ext;void search()int i;printf("ttt学生信息查找");printf("n1. 按学号查找");printf("n2.按姓名查找");printf("n3.返回主菜单");prin tf("n 请输入 1-3:");sca nf("%d",&i);switch(i)case 1:search1();break;case 2:search2();break;