Backspace key reads a character instead of removing password in C++ program

#include<iostream.h>
#include<conio.h>
#include<stdio.h>
#include<string.h>
#include<dos.h>
class project
{
private:
	int i,oop,dld,dbc,ca,eng,total;
	float percent;
	char name[10]; char fname[10]; char program[4];
public:
	void design(void)
	{
	for(i=0;i<=40;i++)
	{
	gotoxy(5+i,2);
	cout<<"\xdb";
	gotoxy(5+i,4) ;
	cout<<"\xdb";
	gotoxy(5+i,23) ;
	cout<<"\xdb";
	gotoxy(5+i,25)  ;
	cout<<"\xdb";
	}
	for(i=0;i<=22;i++)
	{
	gotoxy(5,2+i);
	cout<<"\xdb";
	gotoxy(45,2+i);
	cout<<"\xdb";
	}
	gotoxy(11,3);
	cout<<" Detailed Marks Certificate ";
	gotoxy(9,24);
	cout<<"For Help contact DB Administrator ";
	}
	void input(void)
	{
	gotoxy(12,6);
	cout<<"1. OOP:";
	gotoxy(12,8);
	cout<<"2. DLD:";
	gotoxy(12,10) ;
	cout<<"3. DBC:";
	gotoxy(12,12);
	cout<<"4. C.Alg:";
	gotoxy(30,6);
	gotoxy(12,14);
	cout<<"5. Eng:";
	gotoxy(30,6);
	cout<<"Name:";
	gotoxy(30,8);
	cout<<"F/Name:";
	gotoxy(30,10);
	cout<<"Program:";
	gotoxy(9,17);
	for(i=0;i<=32;i++)
	{
	cout<<"\xdb";
	}
	gotoxy(14,18);
	cout<<"Total:";
	gotoxy(9,19);
	cout<<"Percentage:";
	gotoxy(14,20);
	cout<<"Grade:";
	}
	void call(void)
	{
	gotoxy(19,6);
	cin>>oop;
	gotoxy(19,8);
	cin>>dld;
	gotoxy(19,10);
	cin>>dbc;
	gotoxy(21,12);
	cin>>ca;
	gotoxy(19,14);
	cin>>eng;
	gotoxy(36,6);
	cin>>name;
	gotoxy(37,8);
	cin>>fname;
	gotoxy(39,10);
	cin>>program;
	total=oop+dld+dbc+ca+eng;
	gotoxy(20,18);
	cout<<total;
	percent=total/5;
	gotoxy(20,19);
	cout<<percent;
		if ((percent<=100)&&(percent>=90))
		{
		gotoxy(20,20);
		cout<<"A";
		}
		else
		{
		if((percent<90)&&(percent>=80))
		{
		gotoxy(20,20);
		cout<<"B";
		}
		else
		{
		if((percent<80)&&(percent>=70))
		{
		gotoxy(20,20);
		cout<<"C";
		}
		else
		{
		if ((percent<70)&&(percent>=50))
		{
		gotoxy(20,20);
		cout<<"D";
		}
		else
		{
		gotoxy(20,20);
		cout<<"Fail";
		}
		}
		}
		}

	}
};
void main(void)
{
start:
textbackground(4);
textcolor(7);
clrscr();
gotoxy(30,7);
cout<<"Log_In_Page";
gotoxy(5,9);
cout<<"User_Name:";
gotoxy(5,11);
cout<<"Password:";

char name1[10]={"kardan"};

char name2[10];
char pass1[10]={"google"};
char pass2[10]={""};
gotoxy(15,9);
cin>>name2;
gotoxy(14,11);
int i=0;
char ch;
cout<<pass2;
while((ch=getch())!='\r')
{
if(ch!='\b')
{
putch('x');
pass2[i]=ch;
i++;
}
//gotoxy(13+i,11);
if(getch()==8)
{
gotoxy(13+i,11);
//putch('\0');
pass2[i-1]='\0';
i--;
cout<<'\0';
}
}
if(strcmp(name1,name2)==0 && strcmp(pass1,pass2)==0)
{
textbackground(0);
textcolor(7);
clrscr();
gotoxy(25,15);
cout<<"Loading.....";
int j;
for(j=0;j<=40;j++)
{
gotoxy(10+j,16);
cout<<"\xdb";
delay(100);
}
clrscr();
gotoxy(15,15);
cout<<"Press any key to coontinue..." ;
getch();
clrscr();
project obj;
obj.design();
obj.input();
obj.call();
}
else
{
clrscr();
gotoxy(5,15);
cout<<"\n Invalid Password";
gotoxy(5,18);
cout<<"Try Again";
getch();
goto start;
}
getch();
}