Program Biling Warnet Sederhana Dengan C++

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

main()
{
struct pelanggan
{
char nama[25];
float mulai;
float selesai;
long int bayar;
}dataku[10];

int i,n;
long int total_jam;
long int diskon;
long int biaya;
long int total;
long int uang_kembali;

cout<<"input jumlah pelanggan : ";
cin>>n;
cout<<"masukkan data pelanggan"<<endl;
for(i=1;i<=n;i++)
{
cout<<"komputer ke - "<<i<<endl;
cout<<"nama : "; cin>>dataku[i].nama;
cout<<"jam mulai : "; cin>>dataku[i].mulai;
cout<<"jam selesai : "; cin>>dataku[i].selesai;
total_jam=dataku[i].selesai-dataku[i].mulai;
cout<<"jumlah jam : "<<total_jam<<endl;
biaya=total_jam*3000;
cout<<"biaya : Rp."<<biaya<<endl;
if(total_jam>2)
{
diskon=biaya*0.1;
cout<<"Diskon : "<<diskon<<endl;
}
else
{
diskon=0;
cout<<"tidak ada diskon"<<endl;
}
total=biaya-diskon;
cout<<"total yang harus dibayar : Rp."<<total<<endl;
cout<<"uang bayar : Rp."; cin>>dataku[i].bayar;
uang_kembali=dataku[i].bayar-total;
cout<<"uang kembali : Rp."<<uang_kembali<<endl;
cout<<endl;
}
cout<<endl;
cout<<"Daftar Transaksi Warnet||"<<endl;
cout<<"----------------------------------"<<endl;
cout<<"no nama uang bayar"<<endl;
cout<<"----------------------------------"<<endl;

for(i=1;i<=n;i++)
{
cout<<i<<" ";
cout<<dataku[i].nama<<" ";
cout<<dataku[i].bayar<<endl;
}
cout<<"----------------------------------"<<endl;
getch();