C语言学生选课系统(代码)

#include

#include

#include

int N1,N2;

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

{

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 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));

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->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,&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 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;