Hi every body please solve my question  in my code i should save at least 2 person but i can't please help me .my code is about data bank(save information and print them)

#include<fstream>
 #include <iostream>

 using namespace std;

struct Person
{  char  password;
char  username[20];
char  first_name[20];
char  last_name[20];
char  father_name[20];
char  birthdate[20];
char  birthplace[20];
int   age;
char  sex[10];
char  nationality[20];
char  job[20];
char  marital_status[20];
long double   phone_number;
char  address[80];
char  blood_type[5];
float height;
float weight;
char  allergen_type[20];
char  previous_disease[20];
long double bank_account;
char  bank_account_expiration_date[20];
float account_balance;
};
int main(){
while(true){
cout<<"which person are you?  "<<"     person[i]<<i"<<"   for example ( person=3 << enter 3 )"<<endl;
int i; cin>>i;if(i==0)break;
cout<<"which one do you want? "<<"     1.sing up"<<"      2.sing in"<<"      0.exit"<<endl;
int a; cin>>a;
        if (a == 1)
            {Person p_i;ofstream pepole("information.txt");
            cout<<"please enter your information carefully!  "<<endl;
            cout<<"a) Identity information: "<<endl<<endl;
            pepole<<"person ("<<i<<")"<<endl;
            cout<<"password:      ";
            cin>>p_i.password;pepole<<"password:      "<<p_i.password<<endl;
            cin.ignore();
            cout<<"username:      ";
            cin.getline(p_i.username,20);pepole<<"username:      "<<p_i.username<<endl;
            cout<<"first name:    ";
            cin.getline(p_i.first_name,20);pepole<<"first name:    "<<p_i.first_name<<endl;
            cout<<"last name:     ";
            cin.getline(p_i.last_name,20);pepole<<"last name:     "<<p_i.last_name<<endl;
            cout<<"father name:   ";
            cin.getline(p_i.father_name,20);pepole<<"father name:   "<<p_i.father_name<<endl;
            cout<<"birthdate:     ";
            cin.getline(p_i.birthdate,20);pepole<<"birthdate:     "<<p_i.birthdate<<endl;
            cout<<"birthplace:    ";
            cin.getline(p_i.birthplace,20);pepole<<"birthplace:    "<<p_i.birthplace<<endl;
            cout<<"age:           ";
            cin>>p_i.age;pepole<<"age:           "<<p_i.age<<endl;
            cin.ignore();
            cout<<"sex:           ";
            cin.getline(p_i.sex,10);pepole<<"sex:           "<<p_i.sex<<endl;
            cout<<"nationality:   ";
            cin.getline(p_i.nationality,20);pepole<<"nationality:   "<<p_i.nationality<<endl;
            cout<<"job:           ";
            cin.getline(p_i.job,20);pepole<<"job:           "<<p_i.job<< endl;
            cout<<"marital status:";
            cin.getline(p_i.marital_status,20);pepole<<"marital status:"<<p_i.marital_status<<endl;
            cout<<"phone number:  ";
            cin>>p_i.phone_number;pepole<<"phone number:  "<<p_i.phone_number<<endl;
            cin.ignore();
            cout<<"address:       ";
            cin.getline(p_i.address,80);pepole<<"address:       "<<p_i.address<<endl;
            cout<<endl;
            cout<<"b) Health information: "<<endl<<endl;
            cout<<"blood type:      ";
            cin.get(p_i.blood_type,5);pepole<<"blood type:      "<<p_i.blood_type<<endl;
            cout<<"height(m):       ";
            cin>>p_i.height;pepole<<"height(m):       "<<p_i.height<<endl;
            cin.ignore();
            cout<<"weight(kg):      ";
            cin>>p_i.weight;pepole<<"weight(kg):      "<<p_i.weight<<endl;
            cin.ignore();
            cout<<"allergen type:   ";
            cin.getline(p_i.allergen_type,20);pepole<<"allergen type:   "<<p_i.allergen_type<<endl;
            cout<<"previous disease:";
            cin.getline(p_i.previous_disease,20);pepole<<"previous disease:"<<p_i.previous_disease<<endl;
            cout<<endl;
            cout<<"c) Banking information:  "<<endl<<endl;
            cout<<"bank account:                 ";
            cin>>p_i.bank_account;pepole<<"bank account:                 "<<p_i.bank_account<<endl;
            cin.ignore();
            cout<<"bank account expiration date: ";
            cin.getline(p_i.bank_account_expiration_date,6);pepole<<"bank account expiration date: "<<p_i.bank_account_expiration_date<<endl;
            cout<<"account balance:              ";
            cin>>p_i.account_balance;pepole<<"account balance:              "<<p_i.account_balance<<endl;
            cout<<"thank you! Dear"<<p_i.first_name<<endl;
            cout<<"Your information sucecessfully saved."<<endl;
            cout<<endl;
            }
        else if (a == 2)
            {cout<<"please enter your password:    ";
            int c;cin>>c;Person p_i;
            cout<<endl;
               if(p_i.password==c)
              {cout<< "which one your informations do you want? "<<endl;
               cout<< "1)username        2)password         3)first name          4)last name"      <<endl;
               cout<< "5)father name     6)birthdate        7)birthplace          8)age"            <<endl;
               cout<< "9)sex             10)nationality     11)job                12)martial status"<<endl;
               cout<< "13)phone number   14)address         15)blood type         16)height"        <<endl;
               cout<< "17)weight         18)allergen type   19)previous disease   20)bank account"  <<endl;
               cout<< "21)bank account expiration date      22)account balance"                     <<endl;
                  int d;cin>>d;
                  switch(d)
                  {case 1:cout<<p_i.first_name<<" your password is "<<p_i.password<<endl;break;
                   case 2:cout<<p_i.first_name<<" your username is "<<p_i.username[20]<<endl;break;
                   case 3:cout<<" your first name is"<<p_i.first_name[20]<<endl;break;
                   case 4:cout<<p_i.first_name<<" your last name is "<<p_i.last_name[20]<<endl;break;
                   case 5:cout<<p_i.first_name<<" your father_name is "<<p_i.father_name[20]<<endl;break;
                   case 6:cout<<p_i.first_name<<" your birthdate is "<<p_i.birthdate[20]<<endl;break;
                   case 7:cout<<p_i.first_name<<" your birthplace is "<<p_i.birthplace[20]<<endl;break;
                   case 8:cout<<p_i.first_name<<" your age is "<<p_i.age<<endl;break;
                   case 9:cout<<p_i.first_name<<" your sex is "<<p_i.sex[10]<<endl;break;
                   case 10:cout<<p_i.first_name<<" your nationality is "<<p_i.nationality[20]<<endl;break;
                   case 11:cout<<p_i.first_name<<" your job is "<<p_i.job[20]<<endl;break;
                   case 12:cout<<p_i.first_name<<" your marital status is "<<p_i.marital_status[20]<<endl;break;
                   case 13:cout<<p_i.first_name<<" your phone number is "<<p_i.phone_number<<endl;break;
                   case 14:cout<<p_i.first_name<<" your address is "<<p_i.address[80]<<endl;break;
                   case 15:cout<<p_i.first_name<<" your blood type is "<<p_i.blood_type[5]<<endl;break;
                   case 16:cout<<p_i.first_name<<" your height is "<<p_i.height<<endl;break;
                   case 17:cout<<p_i.first_name<<" your weight is "<<p_i.weight<<endl;break;
                   case 18:cout<<p_i.first_name<<" your allergen type is "<<p_i.allergen_type[20]<<endl;break;
                   case 19:cout<<p_i.first_name<<" your previous disease is "<<p_i.previous_disease[20]<<endl;break;
                   case 20:cout<<p_i.first_name<<" your bank account is "<<p_i.bank_account<<endl;break;
                   case 21:cout<<p_i.first_name<<" your bank account expiration date is "<<p_i.bank_account_expiration_date[6]<<endl;break;
                   case 22:cout<<p_i.first_name<<" your account balance is "<<p_i.account_balance<<endl;break;
                  }}
               else
               cout<<"your password is worong!"<<endl<<"please enter your password again. ";cout<<endl;

               }
        else if (a == 0)
            break;
        else
               cout<<"wrong input!!!!!"<< endl;
 }cout<<"good bye! have a nice day!";
 return 0;}