#include<fstream.h>
#include<stdio.h>
#include<string.h>
#include<conio.h>

struct up{
   char user[20];
   char pwd[15];
   char mno[10];
   char ban[12];
} up1;

class login{
   public:
      void getregster();
      void signin();

      char un1[20];
      char pw1[15];
      char rpw1[15];
      char mno1[10];
      char ban1[12];
};

void login::getregster(){
   clrscr();
   cout<<"USERNAME:            \t";
   gets(un1);
   int passflag = 0;
   do{
      if(passflag) cout << "Passwords do not match\n";
      passflag = 1;
      cout<<"\nPassword:          \t";
      gets(pw1);
      cout<<"\nConfirm password:   \t";
      gets(rpw1);
   } while(strcmp(pw1, rpw1) != 0);

   int numflag = 0;
   do{
      if(numflag) cout << "Not a valid number\n";
      numflag = 1;
      cout<<"\nMobile Number:      \t";
      gets(mno1);
   } while(strlen(mno1) != 10);

   cout<<"\nBank Account Number:\t";
   gets(ban1);
   cout<<"\npress any key";
   getch();

   strcpy(up1.user, un1);
   strcpy(up1.pwd, pw1);
   strcpy(up1.mno, mno1);
   strcpy(up1.ban, ban1);

   fstream in1;
   in1.open("record.dat",ios::binary|ios::app);
   in1.write((char*)&up1,sizeof(up1));

   cout<<"    Account Created :)";
}

void login::signin(){
   char un2[20];
   char pw2[15];
   clrscr();
   cout<<"USERNAME:            \t";
   gets(un2);
   cout<<"\nPassword:          \t";
   gets(pw2);
   fstream in2;
   in2.open("record.dat",ios::binary|ios::app);
   while(in2){
      in2.read((char*)&up1,sizeof(up1));

      if(in2.eof()){
	 cout<<"\nincorrect username or password";
	 break;
      }
      if((strcmpi(un2,up1.user)==0)&&(strcmpi(up1.pwd,pw2)==0)){
	 cout<<"\nsigned in!";
	 break;
      }
   }
}


void main(){
    clrscr();
    login l;
    cout<<"\n   *** WELCOME TO PAYTM ***";
    int n;
    cout<<"\n Please choose an option:\n1:Log In \n2:New User? Sign up\n";
    cin>>n;
    switch(n){
       case 1:
	 l.signin();
	 break;
       case 2:
	 l.getregster();
	 break;
       default:
	 cout<<"\n you did not choose a valid option"<<endl;
     }

     getch();
}