Tugas Membuat Struk

#include <conio.h>
#include <iostream>
#include <conio.h>
#include <iomanip>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
struct databrg
{
   char namabrg[15];
   long hrgsatuan;
   int jmlhbeli;
};
struct abc
{
 int nota,jmlhtrx,bayar;
   databrg * d;
};
 abc t;
long total(int a)
{long th;
th=t.d[a].hrgsatuan*t.d[a].jmlhbeli;
return th;
}
long subtotal()
{long s;
 s=0;
   for(int i=0;i<t.jmlhtrx;i++)
    {s=s+total(i);}
   return s;
}
long diskon()
{long d;
 if (subtotal()>180000)
    {d=subtotal()*0.15;}
   else if (subtotal()>70000)
    {d=subtotal()*0.05;}
   else
    {d=0;}
   return d;
}
 long ppn()
 {long p;
    p=0.1*subtotal();
      return p;
}
 long grand()
   {long g;
    g=subtotal()-diskon()+ppn();
      return g;
}
long kembalian()
   {long k;
    k=t.bayar-grand();
   return k;
}
void tampil(int u)
{
cout<<setiosflags(ios::left)<<setw(15)<<t.d[u].namabrg;
cout<<setiosflags(ios::right)<<setw(8)<<t.d[u].jmlhbeli;
cout<<setiosflags(ios::left)<<setw(8)<<t.d[u].hrgsatuan;
cout<<""<<setw(6)<<total<< endl;
}
int main(void)
{
cout<<"=============================================="<<endl;
cout<<"           ALFAMART WAYKANDIS              "<<endl;
cout<<"=============================================="<<endl;
cout<<"No Struk : "; cin>>t.nota;
cout<<endl;
cout<<"Jumlah transaksi : ";cin>>t.jmlhtrx;
t.d=new databrg[t.jmlhtrx];
for(int i=0;i<t.jmlhtrx;i++)
{
cout<<endl;
cout<<"Transaksi ke-"<<i+1<<endl;
cout<<"Nama Barang : "; cin>>t.d[i].namabrg;
cout<<"Jumlah Beli : "; cin>>t.d[i].jmlhbeli;
cout<<"Harga Satuan : "; cin>>t.d[i].hrgsatuan;
}
system("CLS");
cout<<"\n";
cout<<"     RATU DIBALAU 5 / 08159843528         "<<endl;
cout<<"    PT.SUMBER ALFARIA TRIJAAYA.TBK\n      "<<endl;
cout<<" JL.MH.THAMRIN NO.9,CIKOKOL, TANGGERANG   "<<endl;
cout<<"    NPWP : 01.336.238.9-054.000           "<<endl;
cout<<"  JL.RATU DIBALAU, RT. 04, RW. KEDATON    "<<endl;
cout<<"=========================================="<<endl;
cout<<"  Bon L596-454-24032478 Kasir : Obi reja  "<<endl;
cout<<"=========================================="<<endl;
for(int i=0;i<t.jmlhtrx;i++)
    {tampil(i);}
cout<<"Disc. "<<diskon()<<endl;
cout<<"------------------------------------------"<<endl;
cout<<"\n";
cout<<"------------------------------------------"<<endl;
cout<<"Total Item    \t\t ";cin>>t.jmlhtrx;
cout<<"Total Disc    \t\t\t"<<diskon()<<endl;
cout<<"Total Belanja \t\t\t"<<grand()<<endl;
cout<<"Tunai         \t\t\t";cin>>t.bayar;
cout<<"Kembalian     \t\t\t"<<kembalian()<<endl;
cout<<"PPN          "<<ppn()<<endl;
cout<<"=========================================="<<endl;
cout<<" Tgl. 24-03-2018    13:57:56   V.2018.1.4 "<<endl;
cout<<"------------------------------------------"<<endl;
cout<<"Kritik&Saran:1500959, SMS: 0817111234\n";
getch();
}