C++达人帮个忙，程序也写好

程序已经写好，如下，请帮帮忙改一下，弄出衣个简单的界面，不用太复杂，改一下，看起来更舒服方便一点，摆脱了
#include <iostream>
#include <fstream>
using namespace std;
#include <stdlib.h>
struct student
{
     int num;
     char name[20];
     double Chinese;
     double math;
     double English;
     double totel;
     double ave;
};
void main()
{
     int n,j;
     double sum=0;
     double ave=0;
     struct student stu[5];
     struct student stutemp;
     cout<<"请输入学生总数：";
     cin>>n;
     ofstream outfile;
     outfile.open("file.dat",ios::binary);
     if(! outfile)
     {
         cout<<"can not open file.dat";
         abort();
     }
     for(int i=0;i<n;i++)
     {
         cout<<"请输入: 学号,姓名,语文,数学,英语:\n"<<endl;
         cin>>stu[i].num>>stu[i].name>>stu[i].Chinese>>stu[i].math>>stu[i].English;
         stu[i].totel=stu[i].Chinese+stu[i].math+stu[i].English;
         stu[i].ave=stu[i].totel/3;
        
         outfile.write((char*)&stu[i],sizeof(struct student));
     }
     outfile.close();
     ifstream infile;
     infile.open("file.dat",ios::binary);
     if(! infile)
     {
         cout<<"can not open file.dat";
         abort();
     }
     cout<<"学生数据如下：\n"<<endl;
     for(i=0;i<n;i++)
     {
         infile.read((char*)&stu[i],sizeof(struct student));
         cout<<stu[i].num<<","<<stu[i].name<<","<<stu[i].Chinese<<","<<stu[i].math<<","<<stu[i].English<<endl;
     }
     cout<<"语文总分 平均分\n";
         for(i=0;i<n;i++)
     {
         sum=sum+stu[i].Chinese;