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C语言课设学生选修课程系统（大作业）
2022-07-01 06:17:00 【普通学长】
一、设计功能(文章仅供参考)
(1)系统以菜单方式工作；
(2)课程信息和学生信息的录入功能(课程信息有文件保存)----输入；
(3)课程信息浏览功能----输出；
(4)查询功能(至少一种查询方式)—算法；
(5)按学分查询；
(6)某门课程学生选修情况(可选项)。
二、功能展示
三、思维导图
四、程序源码
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
int N1,N2;
int n=0;
struct course
{
int num1; //课程编号
char name1[20];
char major[20];
char type[20];
int credit;
int period;
char teacher[20];
int people; //选此门课程的人数
struct course *next; }; //结构体指针
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 * head1;
struct student * head2;
void zhang() //从键盘录入课程信息
{
struct course *p1,*p2;
N1=0;
p1=p2=(struct course *)malloc(sizeof(struct course));
int y,n;
if(n==0)
do
{
printf("--------------------\n");
printf("请输入课程编号:");
scanf("%d",&p1->num1);
printf("请输入课程名称:");
scanf("%s",p1->name1);
printf("请输入主修:");
scanf("%s",p1->major);
printf("请输入课程性质:");
scanf("%s",p1->type);
printf("请输入学分:");
scanf("%d",&p1->credit);
printf("请输入课时:");
scanf("%d",&p1->period);
printf("请输入教师名称:");
scanf("%s",p1->teacher);
n++;
p1++;
printf("\n1.继续输入.\n0.输入完毕.\n");
printf("请选择：");
scanf("%d",&y);
}
while(y==1);
printf("提示：输入完毕!你一共输入%d个\n",n);
}
void zhang1() //从文件录入课程信息
{
FILE * fp;
char filepath[20];
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",filepath);
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;
else
p2->next=p1;
p2=p1;
p1=(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("\t\t\t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:");
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;
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("\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;
else
p2->next=p1->next;
printf("已删除\n");
N1=N1-1;
}
else
printf("没有此课程\n");
end:;
}
void managementc() //课程信息管理函数
{
struct course * p1;
int i,num1;
printf("\t\t\t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:{
struct course *p1,*p2;
N1=0;
p1=p2=(struct course *)malloc(sizeof(struct course));
int y,n;
if(n==0)
do
{
printf("--------------------\n");
printf("请输入课程编号:");
scanf("%d",&p1->num1);
printf("请输入课程名称:");
scanf("%s",p1->name1);
printf("请输入主修:");
scanf("%s",p1->major);
printf("请输入课程性质:");
scanf("%s",p1->type);
printf("请输入学分:");
scanf("%d",&p1->credit);
printf("请输入课时:");
scanf("%d",&p1->period);
printf("请输入教师名称:");
scanf("%s",p1->teacher);
n++;
p1++;
printf("\n1.继续输入.\n0.输入完毕.\n");
printf("请选择：");
scanf("%d",&y);
}
while(y==1);
printf("提示：输入完毕!你一共输入%d个\n",n);
} break;
case 2:printf("请输入您要删除的课程编号:\n");
scanf("%d",&num1);
delc(num1);break;
case 3:break;
}
}
void putin(void) //从键盘录入学生信息
{
int i,n,y;
struct student *p1,*p2;
N2=0;
p1=p2=(struct student *)malloc(sizeof(struct student));
do
{
printf("学号:\t");
scanf("%d",&p1->num2);
printf("姓名:\t");
scanf("%s",p1->name2);
p1->nelen=0;
for(i=0;i<20;i++) p1->nelenum[i]=0;
head2=NULL;
n++;
p1++;
printf("\n1.继续输入.\n0.输入完毕.\n");
printf("请选择：");
scanf("%d",&y);
}
while(y==1);
printf("提示：输入完毕!你一共输入%d个\n",n);
}
void putin2() //从文件录入学生信息
{
int i=0;
FILE * fp;
char filepath[20];
struct student *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)
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\t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("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;
}
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("\n无法删除\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("已删除\n");
N2=N2-1;
}
else
printf("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("\t\t\t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");
scanf("%d",&i);
switch(i)
{
case 1:{
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 2:{
printf("请输入您要删除的学生编号:\n");
scanf("%d",&num2);
dels(num2);} break;
case 3:break;
}
}
void elect() //学生选课
{
struct student * s;
struct course * p1;
int a,i,b;
printf("请输入您的学号:\n");
scanf("%d",&a);
s=head2;
while((s->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->nelenum[i])==0;i++);
s->nelenum[i]=b;
p1=head1;
while((p1->num1)!=b)
p1=p1->next;
for(i=0;(s->nelenum[i])!=0;i++);
s->nelenum[i]=b;
(p1->people)++;
(s->nelen)=(s->nelen)+(p1->credit);
(p1->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->num2!=a&&p!=NULL) p=p->next;
if(p==NULL)
printf("您的信息不存在:\n");
else
{
printf("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->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 elective() //学生选课信息管理
{
int i;
printf("\t\t\t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",&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;
int i,j;
if(n!=0)
{
printf("学生总数:%d\n", n);
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");
printf("-----------------------------------------------------\n");
for(i=0;i<n;i++)
printf("%6d%13s%13s%10s%7d%7d%12s%5d\n",&p->num1,p->name1,p->major,p->type,&p->credit,&p->period,p->teacher,&p->people);
}
else printf("提示:无数据，请输入数据！");
}
void lists() //浏览学生信息
{
struct student * p;
int a;
p=head2;
printf("学生编号 学生姓名 所选课程编号 所选课程学分\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("%d",&p->nelenum[a]);
printf("\n");
p=p->next;
}
}
void intoc() //存储课程信息
{
FILE * fp;
struct course * p;
char filepath[30];
printf("输入路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"w"))==NULL)
{
printf("\无法储存!");
exit(0);
}
p=head1;
while(p!=NULL)
{
fprintf(fp,"%d%s%s%s%d%d%s%d\n",p->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 filepath[30];
printf("请输入路径:");
getchar();
gets(filepath);
if((fp=fopen(filepath,"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
{
int i;
printf("\t\t\t信息存储\n");
printf("1.课程信息存储\n");
printf("2.学生信息存储\n");
printf("3.返回主菜单\n");
printf("请输入1-3\n");
scanf("%d",&i);
switch(i)
{
case(1):intoc();break;
case(2):intos();break;
case(3):break;
}
}
void store() //信息存储浏览函数
{
int i;
printf("\t\t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");
scanf("%d",&i);
switch(i)
{
case(1):listc();break;
case(2):lists();break;
case(3):into();break;
case(4):break;
}
}
void search1() //按学生编号查找学生信息
{
int a,b;
struct student * p;
printf("请输入学生编号");
scanf("%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->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 search2() //按学生姓名查找学生信息
{
int b;
char name[20];
struct 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->nelenum[b]!=0&&b<14;b++)
printf("%d",p->nelenum[b]);
printf("%10d\n",p->nelen);
}
p=p->next;
}
}
void search() //学生信息查找主函数
{
int i;
printf("\t\t\t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;}}
int main() //主函数
{
char m;
int i;
start:
printf("\t\t\t*******************************\n");
printf("\n\t\t\t\t学生选修课程系统!\n");
printf("\n\t\t\t\t欢迎使用此系统!\n");
printf("\t\t\t*******************************\n");
printf("\n");
printf("\t\t\t\t-----目录-----\n");
printf("\t\t\t|1.录入课程信息\n");
printf("\t\t\t|2.课程信息管理\n");
printf("\t\t\t|3.录入学生信息\n");
printf("\t\t\t|4.学生信息管理\n");
printf("\t\t\t|5.学生选课\n");
printf("\t\t\t|6.信息存储与浏览\n");
printf("\t\t\t|7.查找学生信息\n");
printf("\t\t\t|8.退出系统\n");
printf("选择功能前面的数字进入功能:\n");
scanf("%d",&i);
switch(i)
{
case 1:system("cls");load(); goto start;break;
case 2:system("cls");managementc();goto start;break;
case 3:system("cls");input();goto start;break;
case 4:system("cls");managements();goto start;break;
case 5:system("cls");elective();goto start;break;
case 6:system("cls");store();goto start;break;
case 7:system("cls");search();goto start;break;
case 8:{
system("cls");
printf("Thank you for using this program!\n\nBye-Bye!\n");
}
}
return 0;
}
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