C语言学生选课系统(代码)

1、#include<stdio.h>#include<stdlib.h>#include<string.h>int N1,N2;struct studentint num2;char name220;int nelenum50;int nelen;struct student * next;struct course/所选课程编号/所选课程学分和int num1;/课程编号char name120;char major20;char type20;int credit;int period;char teacher20;int people;struct co

2、urse *next;struct course * head1;struct student * head2;void zhang()/从键盘录入课程信息/选此门课程的人数/结构体指针struct course *p1,*p2;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");scanf("%d%s%s%s%d%d%s",&p1->num1,p1->name1,p1->major,p1-&

3、gt;type,&p1->cr edit,&p1->period,p1->teacher);p1->people=0;head1=NULL;while(p1->num1!=0)N1=N1+1;if(N1=1)head1=p1;else p2->next=p1;p2=p1;p1=(struct course * )malloc(sizeof(struct course);scanf("%d%s%s%s%d%d%s",&p1->num1,p1->name1,p1->major,p1->type,

4、&p1->cr edit,&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;N1=0;printf(" 请输入您要读取的路径:");getchar();gets(filepath);if(fp=fopen(filepath,"r")=NULL)printf(" 找不到 %s 文件 !n",file

5、path);exit(0);p1=p2=(struct course*)malloc(sizeof(struct course);fscanf(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)head1=p1;elsep2->next=p1;p2=p1;p1

6、=(struct course * )malloc(sizeof(struct course);fscanf(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("ttt 录入课程信息 n");printf(&

7、quot;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:");scanf("%d",&i);switch(i)case 1: 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;i

8、f(head1=NULL)head1=p0;p0->next=NULL;elsewhile(p0->num1>p1->num1) && (p1->next!=NULL)p2=p1;p1=p1->next;if(p0->num1<=p1->num1)if(head1=p1)head1=p0;elsep2->next=p0;p0->next=p1;elsep1->next=p0;p0->next=NULL;N1=N1+1;void delc(int num1)/ 删除课程信息struct course *

9、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->next;if(num1=p1->num1)if(p1=head1)head1=p1->next;elsep2->next=p1->next;printf(" 已删除 n");N1=N1-1;elseprintf(" 没有此课程n");end:;void ma

10、nagementc()/课程信息管理函数struct course * p1;int i,num1;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");scanf("%d",&i);switch(i)case 1:p1=(struct course *)malloc(sizeof(struct course);printf(&

11、quot;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");scanf("%d%s%s%s%d%d%s",&p1->num1,p1->name1,p1->major,p1->type,&p1->cr edit,&p1->period,p1->teacher);p1->people=0;insert(p1); break;case 2:printf("请输入您要删除的课程编号：n");scanf("%d",&num1);delc(num1

12、); break;case 3: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("学号 t 姓名 n");scanf("%d%s",&p1->num2,p1->name2);p1->nelen=0;for(i=0;i<20;i+) p1->nelenumi=0;head2=NULL;while(p1->nu

13、m2!=0)N2=N2+1;if(N2=1)head2=p1;elsep2->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->nelenumi=0;p2->next=NULL;void putin2()/从文件录入学生信息int i=0;FILE * fp;char filepath20;struct stud

14、ent *p1,*p2;N2=0;printf("请输入您要读取的路径：”)；getchar();gets(filepath);if(fp=fopen(filepath,"rt")=NULL)printf(" 找不到 %s 文件 !n",filepath);exit(0);p1=p2=(struct student*)malloc(sizeof(struct student);fread(p1,sizeof(struct student),1,fp);head2=NULL;while(!feof(fp)i=0;N2=N2+1;if(N2=1)h

15、ead2=p1;elsep2->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("ttt 录入学生信息 n");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(

16、" 请输入 1-3: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;elsewhile(p0->num2>p1->num2) && (

17、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;elsep1->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("n 无法删除 n");goto end;p1=head2;while(num2!=p1-

18、>num2 && p1->next!=NULL) p2=p1;p1=p1->next;if(num2=p1->num2)if(p1=head2)head2=p1->next;elsep2->next=p1->next;printf(" 已删除 n");N2=N2-1;elseprintf(" 没有此学生编号n");end:;void managements()/学生信息管理函数struct student * p1;int i,num2;printf("ttt 学生信息管理n"

19、);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");scanf("%d",&i);switch(i)case 1:p1=(struct student *)malloc(sizeof(struct student);p1->nelen=0;p1->nelenum0=0;printf("numtnamen");scanf("%d%s&

20、quot;,&p1->num2,p1->name2);inserts(p1);break;case 2:printf("请输入您要删除的学生编号：n");scanf("%d",&num2);dels(num2); break;case 3:break;/学生选课void elect() struct student * s;struct course * p;int a,i,b;printf("请输入您的学号：n");scanf("%d",&a);s=head2;while(s-

21、>num2)!=a&&s->next!=NULL) s=s->next;if(s->num2!=a)printf(" 您的信息不存在，请重新输入 :n");goto end;if(s->nelen)>10)printf(" 您的学分已满");goto end;printf("请输入您要选修的课程编号n");scanf("%d",&b);for(i=0;(s->nelenumi)=0;i+);s->nelenumi=b;p=head1;while

22、(p->num1)!=b)p=p->next;for(i=0;(s->nelenumi)!=0;i+);s->nelenumi=b;(p->people)+;(s->nelen)=(s->nelen)+(p->credit);(p->people)+;end:;void back()/学生退课struct student * p;struct course * p1;int b,i,j,a;printf("请输入您的学号：n");scanf("%d",&a);p=head2;while(p-&

23、gt;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");scanf("%d",&b);p1=head1;while(p1->num1!=b) p1=p1->next;for(i=0;p->nelenumi!=b;i+);for(j=i;p->nelenumj!=0;j+)p->nelenumj=p->nelenumj+1;p->nelenum

24、-j=0;(p->nelen)=(p->nelen)-(p1->credit);(p1->people)-;printf("succeed!n");void 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");scanf("%d",&a

25、mp;i);switch(i)case 1:elect();break;case 2:back();break;case 3:break;void listc()/浏览课程信息struct course * p;p=head1;printf(" 课程编号课程名称主修 课程性质学分 课时教师 选课人数 n");while(p!=NULL)printf("%6d%13s%13s%10s%7d%7d%12s%5dn",p->num1,p->name1,p->major, p->type,p->credit,p->period

26、,p->teacher,p->people);p=p->next;void lists()/浏览学生信息struct student * p;int a;p=head2;所选课程学分n");printf("学生编号学生姓名所选课程编号while(p!=NULL)printf("%6d%13s",p->num2,p->name2);printf("%6d",p->nelen);for(a=0;p->nelenuma!=0&&a<14;a+) printf("%d&

27、quot;,p->nelenuma);printf("n");p=p->next;void intoc()/存储课程信息FILE * fp;struct course * p;char filepath30;printf(" 输入路径 :");getchar();gets(filepath);if(fp=fopen(filepath,"w")=NULL)无法储存 !");exit(0);p=head1;while(p!=NULL)fprintf(fp,"%d%s%s%s%d%d%s%dn",p

28、->num1,p->name1,p->major,p->type,p->credit,p->period,p->teacher,p->people);p=p->next;fclose(fp);printf(" 已储存入 %s 文件 !n",filepath);void intos()/存储学生信息FILE * fp;struct student * p;char filepath30;printf("请输入路径：")；getchar();gets(filepath);if(fp=fopen(filep

29、ath,"wt")=NULL)printf("n 无法储存 !");exit(0);p=head2;while(p!=NULL)fwrite(p,sizeof(struct student),1,fp);p=p->next;fclose(fp);printf(" 已储存入 %s 文件 !n",filepath);void into()/信息存储函数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"

30、);printf("3. 返回主菜单n");printf("请输入 1-3n");scanf("%d",&i);switch(i)case(1):intoc();break;case(2):intos();break;case(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&

31、quot;);printf("4. 返回主菜单n");printf(" 请输入1-4:n");scanf("%d",&i);switch(i)case(1):listc();break;case(2):lists();break;case(3):into();break;case(4):break;/按学生编号查找学生信息void search1() int a,b;struct student * p;printf("请输入学生编号”)；scanf("%d",&a);p=head2;pr

32、intf("学号学生姓名所选课程编号所选课程学分n");while(p!=NULL)if(p->num2=a)printf("%6d%13s ",p->num2,p->name2);for(b=0;p->nelenumb!=0&&b<14;b+)printf("%d",p->nelenumb);printf("%10dn",p->nelen);p=p->next;void search2()/按学生姓名查找学生信息int b;char name20;s

33、truct student * p;printf("请输入要查找的学生姓名：")；scanf("%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->name2)=0)printf("%6d%13s ",p->num2,p->name2);for(b=0;p->nelenumb!=0&&b<14;b+) printf("%d",p->nel

34、enumb);printf("%10dn",p->nelen);p=p->next;void search()/学生信息查找主函数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");printf("n 请输入 1-3:");scanf("%d",&i);switch(i)case 1:search1();break;case 2:search2();break;case 3:break;void main()/主函数char m;int i