C++ ATM机大作业 文件写入报错

#include <iostream>
#include<string>
#include<string.h>
#include<stdlib.h>
#include<fstream>
#include<stdio.h>
using namespace std;


 typedef struct user
{
    string account;
    string password;
    string name;
    char gender;
    string address;
    string phone;
    string ID_num;
    double sum;
}USER;

USER users[30];

class ATM
{
public:
    void build();                            //建立账户
    int log_in();                             //登录账户
    void deposit();                       //存款
    void withdrawal();                  //取款
    void balance_enquiry();        //余额查询
    void interest();                         //利率计算
    ATM(string acc,string pas,string nam,char g,string addr,string pho,string id,double s):
   account(acc),password(pas),name(nam),gender(g),address(addr),phone(pho),ID_num(id),sum(s) {}
protected:
    string account;
    string password;
    string name;
    char gender;
    string address;
    string phone;
    string ID_num;
    double sum;
};

void ATM::build()                                   //新建账户
{
    int flag=1;
    char choice;
     ofstream outfile_account("d0.dat"),outfile_password("d1.dat");
     ofstream outfile_name("d2.dat"),outfile_gender("d3.dat");
     ofstream outfile_address("d4.dat"),outfile_phone("d5.dat");
     ofstream outfile_idnum("d6.dat"),outfile_sum("d7.dat");
      if(!outfile_account) {cerr<<"open d0.dat error"<<endl;
       exit(1);}
      if(!outfile_password) {cerr<<"open d1.dat error"<<endl;
      exit(1);}
      if(!outfile_name) {cerr<<"open d2.dat error"<<endl;
       exit(1);}
       if(!outfile_gender) {cerr<<"open d3.dat error"<<endl;
       exit(1);}
       if(!outfile_address) {cerr<<"open d4.dat error"<<endl;
       exit(1);}
       if(!outfile_phone) {cerr<<"open d5.dat error"<<endl;
       exit(1);}
       if(!outfile_idnum) {cerr<<"open d6.dat error"<<endl;
       exit(1);}
       if(!outfile_sum) {cerr<<"open d7.dat error"<<endl;
       exit(1);}

        for(int i=0;flag==1;i++)
        {cout<<"请输入要创建的银行卡账号：";
            cin>>users[i].account;   outfile_account<<users[i].account<<" ";
            cout<<"请输入要创建的银行卡密码：";
        cin>>users[i].password;  outfile_password<<users[i].password<<" ";
        cout<<"请输入您的姓名：";
        cin>>users[i].name;   outfile_name<<users[i].name<<" ";
        cout<<"请输入您的性别：";
        cin>>users[i].gender;   outfile_gender<<users[i].gender<<" ";
        cout<<"请输入您的现住址：";
        cin>>users[i].address;   outfile_address<<users[i].address<<" ";
        cout<<"请输入您的电话或手机号码：";
        cin>>users[i].phone;   outfile_phone<<users[i].phone<<" ";
        cout<<"请输入您的身份证号：";
        cin>>users[i].ID_num;  outfile_idnum<<users[i].ID_num<<" ";
        users[i].sum=0;
        outfile_sum<<users[i].sum<<" ";
          flag=0;
          cout<<"是否继续创建银行账户？(Y/N)\n";
          cin>>choice;
          if(choice=='y'||choice=='Y') flag++;
          else  continue;
}
}

int ATM::log_in()                                            //输入账号和密码对应后登录成功，最多尝试输入3次
{
    cout<<"下面请登录您的银行账户"<<endl;
    string account , password;
    ifstream infile_account ("d0.dat",ios::in),infile_password("d1.dat",ios::in);
    int n=3,flag=1,m;
    cout<<"请输入银行账户的账号：";
    cin>>account;
    for(int i=0;i<30 ;++i)                                     // !!!!!!!!!!!!!!!缺少条件
    {
        infile_account>>users[i].account;
        if(account==users[i].account)
        {
            m=i;
            cout<<"检测到此账号存在"<<endl;
            flag--;
            break;

        }
    }
    if(flag==1) cout<<"无此账号",exit(1);
    if(flag==0) cout<<"\n下一步,";

    for(; n>=0;)
    {
        cout<<"请输入密码：";
        cin>>password;
        infile_password>>users[m].password;
         cout<<"m="<<m<<"   此密码："<<users[m].password<<endl;    //测试方便看密码奇怪的变化。。。
        if(password==users[m].password)
        {
            cout<<"登录成功"<<endl;
            break;
        }
        else
        {
            cout<<"密码错误，你还有"<<n<<"次尝试次数"<<endl;
            n--;
            if(n<0)
            {
                cout<<"次数用尽"<<endl;
                return 0;
            }
        }
    }
}

void ATM::deposit()                                                 //存款
{
    int add;
    cout<<"请输入要存入ATM机的钱数（仅支持人民币的面额为100元，即输入整百的数字）：";
    cin>>add;
    sum=sum+add;
}

void ATM::withdrawal()                                              //取款
{

int add;
    cout<<"请输入要取出ATM机的钱数（仅支持人民币的面额为100元，即输入整百的数字）：";
    cin>>add;
    sum=sum-add;
}

void ATM::balance_enquiry()                                        //余额
{
    cout<<"您的余额为："<<sum<<"元"<<endl;
}
void ATM::interest()                                                      //利息
{
    int a,income;
    double in,time;
    cout<<"0.返回"<<endl;
    cout<<"1.活期存款-0.35%"<<endl;
    cout<<"2.定期存款三个月-1.10%"<<endl;
    cout<<"3.定期存款半年-1.30%"<<endl;
    cout<<"4.定期存款一年-1.50%"<<endl;
    cout<<"5.定期存款二年-2.10%"<<endl;
    cout<<"6.定期存款三年-2.75%"<<"\n"<<endl;
    cout<<"请选择存款类型"<<endl;
    cin>>a;
    switch(a){
    case 0 :in=0;break;
    case 1: in=0.0035;break;
    case 2: in=0.011,time=0.25;break;
    case 3: in=0.013,time=0.5;break;
    case 4: in=0.015,time=1;break;
    case 5: in=0.021,time=2;break;
    case 6: in=0.0275,time=3;break;
}
cout<<"请输入存入钱数：";
cin>>income;
if(in==0)  ;
else cout<<"可获利息"<<income*in*time<<"元"<<endl;
}

int main()
{
    ATM a1("1","1","1",'1',"1","1","1",1);
    a1.build();
    a1.log_in();
}