这个程序编译能通过，但是运行后，在D盘建立的TXT文档是空的。没有预期输入的数据
如题，希望大家帮下忙；#include <iostream>
#include <fstream>
#include <ostream>
using namespace std;
class cstudent
{
private:
int num; //学号
char name[3]; //姓名
char sex; //性别,男为M，女为F
int age; //年龄
int mscore; //数学成绩
int cscore; //计算机成绩
int escore; //英语成绩
float ascore; //平均成绩
float all; //总成绩
public:
void get(); //从文件中读取学生信息
void send(); //向文件中输入学生信息
void output1(); //输出信息
void fun(); //计算平均成绩和总成绩
void input(); //输入数据
};ofstream outfile;
ifstream infile;
void cstudent::fun()
{
all=mscore+cscore+escore;cout<<"总成绩："<<all<<endl;
ascore=all/3;cout<<"平均成绩："<<ascore<<endl;
}
void cstudent::send()
{
outfile<<"学号:"; outfile<<num; outfile<<endl;
outfile<<"姓名:"; outfile<<name; outfile<<endl;
outfile<<"性别:"; outfile<<sex; outfile<<endl;
outfile<<"年龄:"; outfile<<age; outfile<<endl;
outfile<<"数学成绩:"; outfile<<mscore; outfile<<endl;
outfile<<"计算机成绩:"; outfile<<cscore; outfile<<endl;
outfile<<"英语成绩:"; outfile<<escore; outfile<<endl;
outfile<<endl;
}
void cstudent::output1()
{
cout<<"学号:"; cout<<num; cout<<endl;
cout<<"姓名:"; cout<<name; cout<<endl;
cout<<"性别:"; cout<<sex; cout<<endl;
cout<<"年龄:"; cout<<age; cout<<endl;
cout<<"数学成绩:"; cout<<mscore; cout<<endl;
cout<<"计算机成绩:"; cout<<cscore; cout<<endl;
cout<<"英语成绩:"; cout<<escore; cout<<endl;
}
void cstudent::input()
{
cout<<"学号:"; cin>>num;
cout<<"姓名:"; cin>>name;
cout<<"性别:"; cin>>sex;
cout<<"年龄:"; cin>>age;
cout<<"数学成绩:"; cin>>mscore;
cout<<"计算机成绩:"; cin>>cscore;
cout<<"英语成绩:"; cin>>escore;
}
void main()
{
cstudent a[2];
ofstream outfile("D:\\学生信息.txt",ios::out);
for (int i=0;i<2;i++)
{
a[i].input();
a[i].send();
cout<<endl;
}
outfile.close();
ifstream infile("D:\\学生信息.txt",ios::in);
for (i=0;i<2;i++)
{
cout<<"No."<<i+1<<endl;
a[i].output1();
a[i].fun();
cout<<endl;
}
}
