程序有点小问题，求大神修改下
//学生的成绩管理系统
#include "iostream.h"
#include "malloc.h"
#include <fstream.h>
#include "conio.h"
#include "stdlib.h"
#include "string.h"
#define LEN sizeof(struct student)
struct student
{
int num;
int math;
int chinese;
int english;
char name[20];
float aver;
float sum...