有哪位大仙能够帮帮我这道C语言编程题！

/*学生通讯录管理系统:
1.学生信息包括:学号、姓名、性别、生日、年龄和平均分;
2.用链表实现;
3.可以浏览学生信息，插入学生信息(在任意位置插入学生信息),新增学生信息(在链表尾部新增学生信息),
删除学生信息,查找学生信息和修改学生信息.
*/
#include
#include
#include
#include
typedef struct student_info
{
char stu_name[15];
long stu_num;
char stu_sex[10];
char Birthday[30];
char age[30];
char Gpa[15];
struct student_info *next;
}Student;
Student *head; /*为全局变量*/
Student *load() /*载入函数,从文件中读数据建立链表*/
{
FILE *fp;
Student *head_1,*p,*q;
head_1=NULL;
fp=fopen("student","rb");
if(fp==NULL)
{
fp=fopen("student","wb");
fclose(fp);
return head_1;
}
p=(Student*)malloc(sizeof(Student));
if(fread(p,sizeof(Student),1,fp)!=1)
return head_1;
head_1=p;
while(!feof(fp))
{
q=p;
p=(Student*)malloc(sizeof(Student));
fread(p,sizeof(Student),1,fp);
q->next=p;
}
q->next=NULL;
free(p);
fclose(fp);
return head_1;
}
int save() /*将修改后的链表中的信息存进文件中*/
{
FILE *fp;
fp=fopen("student","wb");
while(head!=NULL)
{
fwrite(head,sizeof(Student),1,fp);
head=head->next;
}
fclose(fp);
return 0;
}
int Add_student() /*添加学生信息函数 */
{
Student *p,*q;
Student *stud1;
char flag='y';
stud1=(Student*)malloc(sizeof(Student));
while(flag=='y'||flag=='Y')
{
q=p=head;
printf("请输入要添加的学生的姓名:\n");
scanf("%s",stud1->stu_name);
printf("请输入要添加的学生的学号(最多8位数):\n");
scanf("%ld",&stud1->stu_num);
printf("请输入要添加的学生的性别:\n");
scanf("%s",&stud1->stu_sex);
printf("请输入要添加的学生的生日:\n");
scanf("%s",&stud1->Birthday);
printf("请输入要添加的学生的年龄:\n");
scanf("%s",&stud1->age);
printf("请输入要添加的学生的平均分:\n");
scanf("%s",&stud1->Gpa);
stud1->next=NULL;
fflush(stdin);
if(head==NULL)head=stud1;
else
{
while(p->stu_numstu_num&&p->next!=NULL)
{q=p;p=p->next;}
if(p->stu_num>stud1->stu_num)
if(p==head){stud1->next=head;head=stud1;}
else {q->next=stud1;stud1->next=p;}
else p->next=stud1;
}
stud1=(Student*)malloc(sizeof(Student));
printf("添加结束,是否继续添加,'y'或'Y'继续,否者退出!\n");
flag=getchar();
fflush(stdin);
}
free(stud1);
system("cls");
return 0;
}
int del_stu() /*按学号删除学生信息函数*/
{
Student *p,*q;
long stu_num;
char flag='y';
int tage=0;
while(flag=='y'||flag=='Y')
{
p=head;
printf("\ninput the delete student number!\n");
scanf("%d",&stu_num);
if(head==NULL){printf("不存在学生信息!\n");return 0;}
while(p!=NULL)
{
if(p->stu_num==stu_num)
{
tage=1;
if(p==head)head=head->next;
else q->next=p->next;
free(p);break;
}
q=p;p=p->next;
}
if(tage==0) printf("要删除的学生信息不存在!\n");
tage=0;
printf("删除结束,是否继续删除操作:y或Y继续,否者结束!\n");
fflush(stdin);
scanf("%c",&flag);
}
system("cls");
return 0;
}
int find_student() /*按学号查找学生信息*/
{
Student *p;
char flag='y';
long stu_num;
int tage=0; /*1作为找到学生的标志,0为没有找到*/

while(flag=='y'||flag=='Y')
{
printf("input the finding student number!\n");
scanf("%d",&stu_num);
p=head;
if(head==NULL){printf("不存在学生信息!\n");return 0;}
else
while(p!=NULL)
if(p->stu_num==stu_num)
{
tage=1;
printf("你要查找的学生信息如下:\n");
printf("%s\t\t%ld\t\t%s\t\t%s\t%s\t\t%s\t\t\n",p->stu_name,p->stu_num,p->stu_sex,p->Birthday,p->age,p->Gpa);
break;
}

else p=p->next;
if(tage==0)printf("无该学生信息!\n");
tage=0;
printf("查找结束,是否继续查找操作:y或Y继续,否者退出!\n");
fflush(stdin);
scanf("%c",&flag);
}
return 0;
}
int ame_student() /*修改学生信息*/
{
Student *p;
long stu_num;
int tage=0;
int chiose;
char flag='y';
printf("input the change student number!\n");
scanf("%ld",&stu_num);
p=head;
while(flag=='y'||flag=='Y')
{
if(head==NULL){printf("无学生信息存在!\n");return 0;}
while(p!=NULL)
{
if(p->stu_num==stu_num)
{
tage=1;
printf("请选要修改的编号!\n");
printf("1:<修改姓名>\n");
printf("2:<修改学号>\n");
printf("3:<修改性别>\n");
printf("4:<修改生日>\n");
printf("5:<修改年龄>\n");
printf("6:<修改平均分>\n");
printf("请输入1-6!else非法!\n");
scanf("%d",&chiose);
switch(chiose)
{
case 1:
{
char stu_name[15];
printf("请输入修改的名字!\n");
scanf("%s",stu_name);
strcpy(p->stu_name,stu_name);
break;
}
case 2:
{
long stu_num;
printf("请输入修改的学号!\n");
scanf("%ld",&stu_num);
p->stu_num=stu_num;
break;
}
case 3:
{
char stu_sex[10];
printf("请输入修改的性别!\n");
scanf("%s",&stu_sex);
strcpy(p->stu_sex,stu_sex);
break;
}
case 4:
{
char stu_college[30];
printf("请输入修改的生日!\n");
scanf("%s",stu_college);
strcpy(p->Birthday,stu_college);
break;
}
case 5:
{
char stu_profe[30];
printf("请输入修改的年龄!\n");
scanf("%s",stu_profe);
strcpy(p->age,stu_profe);
break;
}
case 6:
{
char stu_tel[15];
printf("请输入修改的平均分!\n");
scanf("%s",stu_tel);
strcpy(p->Gpa,stu_tel);
break;
}
default: {printf("无此操作!\n");break;}
}break;
}
else p=p->next;
}
if(tage==0)printf("无该学生信息!\n");
tage=0;
printf("修改结束,是否继续修改该学生信息操作:y或Y继续,否者退出!\n");
fflush(stdin);
scanf("%c",&flag);
}
fflush(stdin);
system("cls");
return 0;
}
int print_student() /*输出学生信息函数*/
{
Student *p;
p=head;
if(head==NULL){printf("无学生信息!\n");return 0;}
printf("姓名\t学号\t性别\t生日\t年龄\t平均分\t\n");
printf("===========================================================\n");
while(p!=NULL)
{
printf("%s\t%ld\t%s\t%s\t%s\t%s\t\n",p->stu_name,p->stu_num,p->stu_sex,p->Birthday,p->age,p->Gpa);
p=p->next;
}
printf("===========================================================\n");
printf("输出结束!\n");
return 0;
}
int main() /*主函数*/
{
int tage;
head=load();
while(1)
{
printf("\4\4\4\4\4欢迎进入学生管理系统!\4\4\4\4\4\n");
printf(" 1: 添加学生信息\n");
printf(" 2: 删除学生信息\n");
printf(" 3: 查找学生信息\n");
printf(" 4: 修改学生信息\n");
printf(" 5: 输出学生信息\n");
printf(" 6: 退出程序\n");
printf("\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\n");
putchar(10);
printf("请输入1-6,其他输入非法!\n");
scanf("%d",&tage);
switch(tage)
{
case 1:Add_student();break;
case 2:del_stu();break;
case 3:find_student();break;
case 4:ame_student();break;
case 5:print_student();break;
case 6:save();exit(0);break;
default:printf("无此操作\n");break;
}
}
}