waroenk human error

#include <stdio.h>
#include <iostream>
#include <conio.h>
#include <stdlib.h>
#include <iomanip>
#include <string.h>

using namespace std;

garis()
{
        cout<<"=====================================================\n";
}
bintang()
{
        cout<<"*****************************************************\n";
}
minimarket()
{
        cout<<"------------------Waroenk HUMANERROR------------------\n";
}
main()
{
   int i,j;
   char kode_k,kasir[20],lagi;
   long int total_byr=0,bayar,kembali;
   char kode_brg[30],*barang[30];
   int harga[30];
   int jml_bel[30];
   long int sub_total[30];
   atas:
   garis();
   bintang();
   minimarket();
   bintang();
   garis();
   cout<<"KODE KASIR\n";
   cout<<"     1. Anton\n";
   cout<<"     2. Farid\n";
   cout<<"     3. Imad\n";
   cout<<"     4. Yoga\n";
   cout<<"Masukkan Kode Kasir[1/2/3/4]  : "; cin>>kode_k;
   if(kode_k == '1')
   {
      strcpy(kasir,"Anton");
   }
   else if(kode_k =='2')
   {
       strcpy(kasir,"Farid");
   }
    else if(kode_k =='3')
   {
       strcpy(kasir,"Imad");
   }
    else if(kode_k =='4')
   {
       strcpy(kasir,"Yoga");
   }
   else
   {
       cout<<"Kode Salah";
       goto atas;
   }
   item:
   cout<<"Jumlah item               : ";cin>>j;
   minimarket();
   cout<<"KODE BARANG\n";
   garis();
   cout<<"1. Susu (205ml)            Rp. 6.000,00  \n";
   cout<<"2. Susu (500ml)            Rp. 12.000,00  \n";
   cout<<"3. Susu (1000ml)           Rp. 22.000,00  \n";
   cout<<"4. Gula (1/4 kg)           Rp. 3.000,00  \n";
   cout<<"5. Gula (1/2 kg)           Rp. 6.000,00  \n";
   cout<<"6. Gula (1 kg)             Rp. 12.000,00  \n";
   cout<<"7. Minyak Sayur (1/4 kg)   Rp. 5.000,00  \n";
   cout<<"8. Minyak Sayur (1/2 kg)   Rp. 10.000,00  \n";
   cout<<"9. Minyak Sayur (1 kg)     Rp. 20.000,00  \n";
   garis();
   cout<<endl;
   for(i=1;i<=j;i++)
   {
      cout<<"Data Ke-"<<i<<endl;
      cout<<"Kode Barang          : ";cin>>kode_brg[i];
      cout<<"Jumlah Beli          : ";cin>>jml_bel[i];
      garis();
   }
   for(i=1;i<=j;i++)
   {
      if(kode_brg[i]=='1')
      {
        barang[i]="Susu (250ml)";
        harga[i]=6000;
      }
      else if(kode_brg[i]=='2')
      {
        barang[i]="Susu (500ml)";
        harga[i]=12000;
      }
      else if(kode_brg[i]=='3')
      {
        barang[i]="Susu (1000ml)";
        harga[i]=22000;
      }
      else if(kode_brg[i]=='4')
      {
        barang[i]="Gula (1/4 kg)";
        harga[i]=3000;
      }
      else if(kode_brg[i]=='5')
      {
        barang[i]="Gula (1/2 kg)";
        harga[i]=6000;
      }
      else if(kode_brg[i]=='6')
      {
        barang[i]="Gula (1 kg)";
        harga[i]=12000;
      }
      else if(kode_brg[i]=='7')
      {
        barang[i]="Minyak Sayur (1/4 kg)";
        harga[i]=5000;
      }
      else if(kode_brg[i]=='8')
      {
        barang[i]="Minyak Sayur (1/2 kg)";
        harga[i]=10000;
      }
      else if(kode_brg[i]=='9')
      {
        barang[i]="Minyak Sayur (1 kg)";
        harga[i]=20000;
      }
      else
      {
        barang[i]="Kode Salah";
        harga[i]=0;
        cout<<"Kode yang dimasukkan salah\n";
        goto item;
      }
   }
   garis();
   minimarket();
   garis();
   cout<<"Nama Kasir        : "<<kasir<<endl;
   garis();
   cout<<"No.| Nama          |  Harga  | Jumlah |    Sub       \n";
   cout<<"   | Barang        |         | Beli   |    Total     \n";
   garis();
   for(i=1;i<=j;i++)
   {
      sub_total[i]=jml_bel[i]*harga[i];
      cout<<setiosflags(ios::left)<<setw(5)<<i;
      cout<<setiosflags(ios::left)<<setw(15)<<barang[i];
      cout<<setiosflags(ios::right)<<setw(8)<<harga[i];
      cout<<setiosflags(ios::right)<<setw(6)<<jml_bel[i];
      cout<<setiosflags(ios::right)<<setw(15)<<sub_total[i]<<endl;
                                total_byr=total_byr+sub_total[i];
   }
   garis();
   cout<<"                        Total Bayar   :Rp. "<<total_byr<<endl;
   cout<<"                        Uang Bayar    :Rp. "; cin>>bayar;
   kembali=bayar-total_byr;
   cout<<"                        Uang Kembali  :Rp. "<<kembali<<endl;
   cout<<"******************Terima Kasih***********************\n";
   cout<<"Input Lagi [Y/T] : "; cin>>lagi;
   if(lagi=='Y'||lagi=='y')
                goto atas;
   else
                system("cls");goto atas;
   getch();
   selesai:
   cout<<"******************Terima Kasih***********************\n";
}