Script C++ non visual Program penjualan Barang

#include<iostream.h>
#include<stdio.h>
#include<conio.h>

kantin()
{
int no_brg=0;
int jb=0;
int hrg=0;
float total=0;
float bayar=0;
float setoran=0;
float kembali=0;
char lagi,lag;
atas:
clrscr();
cout<<"Masukan no barang=";cin>>no_brg;
if (no_brg==1)
{
    hrg=6000;
        cout<<"Nama Barang=nasi goreng"<<endl;
}
if (no_brg==2)
{
    hrg=4500;
    cout<<"Nama Barang=mie ayam"<<endl;
}
if (no_brg==3)
{
    hrg=5000;
    cout<<"Nama Barang=bakso"<<endl;
}
if (no_brg==4)
{
    hrg=1500;
    cout<<"Nama Barang=es teh"<<endl;
}
if (no_brg==5)
{
    hrg=2000;
    cout<<"Nama Barang=es jeruk"<<endl;
}
cout<<"Harga=Rp. "<<hrg<<" ,-"<<endl;
cout<<"jumlah Barang=";cin>>jb;
total=(hrg*jb);
cout<<"total=Rp."<<total<<" ,-"<<endl;

bayar=bayar+total;
cout<<"Bayar=Rp."<<bayar<<endl;
cout<<"ada barang lagi [Y atau T]=";cin>>lagi;
if (lagi == 'Y' || lagi == 'y')
goto atas;
getch();

cout<<endl;
cout<<"setor uang= Rp. ";cin>>setoran;
kembali=setoran-bayar;
cout<<"Jumlah kembalian=Rp. "<<kembali<<" ,-";
cin>>kembali;
}

main()
{
int kd;
char lg;
back:
clrscr();
cout<<"               **********  SELAMAT DATANG  *********** "<<endl ;
cout<<endl ;
cout<<"                 ******** DI KANTIN KAMPUSKU ********   "<<endl;
cout<<"             ============================================ "<<endl ;
cout<<"                  NO :  MENU     :  HARGA    "<<endl;
cout<<"             ============================================ "<<endl ;
cout<<"                  1. : nasgor    :  Rp.6000  "<<endl;
cout<<"                  2. : mie ayam  :  Rp.4500 "<<endl;
cout<<"                  3. : bakso     :  Rp.5500 "<<endl;
cout<<"                  4. : es teh    :  Rp.1500 "<<endl;
cout<<"                  5. : es jeruk  :  Rp.2000 "<<endl;
cout<<"             =========================================== "<<endl ;
cout<<"1. Masuk Program\n";
cout<<"\n";
cout<<"2. Keluar Program\n";
cout<<"\n";
cout<<"Masukkan Pilihan = ";cin>>kd;
switch(kd)
{
case 1:kantin();break;
case 2:clrscr();cout<<"keluar?";break;
default:cout<<"kode salah";
}
cout<<"\n";
cout<<"kembali ke menu?";cin>>lg;
if (lg=='Y'||lg=='y')
goto back;
getch();
}