Struct Penjualan HP

#include <iostream>
#include <stdio.h>
#include <string.h>
using namespace std;
main()
{

    struct smartphone{
    int harga,jumlah,total;
    char npb[30];
    char merk [15];
    }hp[10];

    int i,j;
    cout<<"Jumlah Data Pembelian ilham store: "; cin>>i;
    for (int a=0; a<i ; a++){
        cin.ignore();
        cout<<" Masukkan Nama Pembeli  :" ;gets(hp[a].npb);
        cout<<" Masukkan Jenis HP      :" ;gets(hp[a].merk);
        cout<<" Masukkan Jumlah Beli   :";cin>>hp[a].jumlah;
        cout<<"------------------------------------------------------"<<endl;

    }
    for (int a=0; a<i; a++){
             if(!strcmp(hp[a].merk,"samsung"))
                {hp[a].harga = 3000000;}
             else if(!strcmp(hp[a].merk,"iphone"))
                {hp[a].harga = 6000000;}
             else if(!strcmp(hp[a].merk,"xiaomi"))
                {hp[a].harga = 2500000;}
             hp[a].total = hp[a].harga * hp[a].jumlah;
        cout<<endl;
        cout << "SELAMAT DATANG DI" <<endl;
        cout << "M ILHAM RIYANTO STORE" <<endl;
        cout << "* STRUK PEMBAYARAN *" << endl;
        cout<<"Nama pembeli : "<<hp[a].npb<<endl;
        cout<<"merk         : "<<hp[a].merk<<endl;
        cout<<"harga        : "<<hp[a].harga<<endl;
        cout<<"Jumlah Beli  : "<<hp[a].jumlah << endl;
    cout<<"Total        : "<<hp[a].total << endl;
    cout<< "~~ Terima Kasih ~~  "<<endl;
    cout<< endl;

    }
}