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#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define maxsize 50
typedef struct
{
char names[maxsize];
int num;
int math;
int english;
int sum_score;
}student;
typedef struct LNode
{
student data;
struct LNode* next;
}LNode;
void studentinit(student t);
int student_show_menu();
void student_show(LNode* head); //<2F><>ȡȫ<C8A1><C8AB>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
void student_input(LNode* head); //<2F><><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
int name_find(LNode* head, student f); //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѯѧ<D1AF><D1A7>
int num_find(LNode* head, student f2); //<2F><>ѧ<EFBFBD>Ų<EFBFBD><C5B2><EFBFBD>ѧ<EFBFBD><D1A7>
void num_seq(LNode* head); //<2F><>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
void sum_seq(LNode* head); //<2F><><EFBFBD>ܳɼ<DCB3><C9BC><EFBFBD><EFBFBD><EFBFBD>
void stu_insert(LNode* head, student in); //<2F><><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ
void stu_del(LNode* head, student* dl); //ɾ<><C9BE>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>Ϣ