关于#c++#的问题

为什么我这个数据存不进去也读不出来

 #include<iostream>
#include<fstream>
using namespace std;
class Teacher{
    char no[1024];
    char name[100];
    char gender[50];
    int age;
    char zc[50];
    char xibu[50];
    char zhuanye[50];
    public:
        friend void tj1(Teacher t[]);
        friend void xs();
    
};
class XingZheng{
    char no[1024];
    char name[100];
    char gender[50];
    int age;
    char zc[50];
    char zm[50];

};
class TX:virtual public Teacher,virtual public XingZheng{
    
};
void tj1(Teacher t[]){
    char m;
    int i=0;
    ofstream out("teacher.txt",ios::out | ios::binary);
    while(1){
        cout<<"Y输入，N退出"<<endl;
        cin>>m;
        if(m=='N'){
            break;
        } 
        else{
            cout<<"编号:"<<endl;
            cin>>t[i].no;
            cout<<"姓名:"<<endl;
            cin>>t[i].name;
            cout<<"性别:"<<endl;
            cin>>t[i].gender;
            cout<<"年龄:"<<endl;
            cin>>t[i].age;
            cout<<"职称:"<<endl;
            cin>>t[i].zc;
            cout<<"系部:"<<endl;
            cin>>t[i].xibu;
            cout<<"专业:"<<endl;
            cin>>t[i].zhuanye;
            out.write((char*)&t[i],sizeof(t));
            out.close();
            i++;
        }
    }
}
void xs(){
    Teacher t;
    ifstream in("teacher.txt",ios::in|ios::binary);
    if(!in){
        cout<<"打开失败"<<endl;
    }
    while(in.read((char*)&t,sizeof(t))){
        cout<<t.no<<"  "<<t.name<<"  "<<t.gender<<"  "<<t.age<<" "<<t.zc<<" "<<t.xibu<<" "<<t.zhuanye<<endl;
    }
    in.close();
}
int main(){
    Teacher t[100];
    tj1(t);
    xs();
}

你tj1的函数else 需要 输一次++一次