Program C++ Aplikasi Kasir Warnet

Hi Lapakers, ane share tugas kuliah ane nih. script coding C++ untuk aplikasi kasir warnet. coba ditelaah dan dipahami setelah dicopas y. hehehe

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

struct
{
char nok,jenis,*nmlayanan;
int tarif,durasi,total;
}rental[10];

long int tokes=0;

main()
{
int i,j;
char lagi;
atas:

clrscr();
cout<<"================================================="<<endl;
cout<<" WARNET BINA CYBER"<<endl;
cout<<"================================================="<<endl;
cout<<"Jumlah Transaksi :";cin>>j;
cout<<endl;
for(i=1;i<=j;i++)
{
cout<<"Transaksi Ke :"<<i<<endl;
cout<<"No. Komputer :";cin>>rental[i].nok;
cout<<"Jenis Layanan :";cin>>rental[i].jenis;
if(rental[i].jenis=='A'||rental[i].jenis=='a')
{rental[i].nmlayanan="Internet";rental[i].tarif=2500;}
else if(rental[i].jenis=='B'||rental[i].jenis=='b')
{rental[i].nmlayanan="Game Online";rental[i].tarif=3000;}
else if(rental[i].jenis=='C'||rental[i].jenis=='c')
{rental[i].nmlayanan="Game Offline";rental[i].tarif=2000;}
else if(rental[i].jenis=='D'||rental[i].jenis=='d')
{rental[i].nmlayanan="Rental Pengetikan";rental[i].tarif=1500;}
cout<<"Tarif Permenit :"<<rental[i].tarif<<endl;
cout<<"Durasi Bermain (menit) :";cin>>rental[i].durasi;
rental[i].total=rental[i].tarif*rental[i].durasi;
tokes=tokes+rental[i].total;
cout<<endl;
}

clrscr();

cout<<"================================================="<<endl;
cout<<"No. No. Jenis Durasi Tarif Total"<<endl;
cout<<" Komp. Layanan Bermain Permenit "<<endl;
cout<<"================================================="<<endl;
for(i=1;i<=j;i++)
{
cout<<setiosflags(ios::left)<<setw(4)<<i;
cout<<setiosflags(ios::left)<<setw(7)<<rental[i].nok;
cout<<setiosflags(ios::left)<<setw(12)<<rental[i].nmlayanan;
cout<<setiosflags(ios::left)<<setw(9)<<rental[i].durasi;
cout<<setiosflags(ios::left)<<setw(12)<<rental[i].tarif;
cout<<setiosflags(ios::left)<<setw(5)<<rental[i].total<<endl;
}
cout<<"================================================="<<endl;
cout<<" Total Keseluruhan :"<<tokes<<endl;
cout<<" Jenis Layanan Paling Banyak:On Progress"<<endl<<endl;

cout<<"Return :";cin>>lagi;
if (lagi=='Y' || lagi=='y')
goto atas;
else
getch();
}