Latihan pertama

#include "conio.h"
#include "iostream.h"
#include "stdio.h"
#include "string.h"

struct barang{
int kode;
int jumlah;
}rproduk[40];

void main(){
    int i=0,j;
    char lg;
    char nama[20];
    long harga;
    long total;
do{
    gotoxy(10,5);cout << "Input Data Penjualan";
    gotoxy(10,6);cout << "--------------------";
    gotoxy(10,7);cout << "Kode : ";cin >> rproduk[i].kode;
    gotoxy(10,9);cout << "Jumlah : ";cin >> rproduk[i].jumlah;
    gotoxy(10,10);cout << "Input lagi[Y/T] : ";cin >> lg;
    clrscr();i++;
    }while(lg=='Y' || lg=='y');
    gotoxy(5,2);cout << "Laporan Data Penjualan";
    gotoxy(5,3);cout << "---------------------------------------------------------";
    gotoxy(5,4);cout << "No Kode Nama Barang Harga Jumlah Total Harga";
    gotoxy(5,5);cout << "---------------------------------------------------------";
    for (j=0;j<i;j++){
switch(rproduk[j].kode){
    case 1:
    strcpy(nama,"TV");
    harga=1000000;
    break;
    case 2:
    strcpy(nama,"DVD");
    harga=650000;
    break;
    case 3:
    strcpy(nama,"CD ROOM");
    harga=400000;
    break;
    default:strcpy,"--";harga=0;
    }
    gotoxy(5,6+j);cout << j+1 << " ";
    gotoxy(9,6+j);cout << rproduk[j].kode << " ";
    gotoxy(15,6+j);cout << nama;
    gotoxy(28,6+j);cout << "Rp ";
    gotoxy(31,6+j);cout << harga;
    gotoxy(46,6+j);cout << rproduk[j].jumlah << " ";
    total=harga*rproduk[j].jumlah;
    gotoxy(51,6+j);cout << "Rp. ";
    gotoxy(54,6+j);cout << total;
    }
    gotoxy(5,7+j);cout << "---------------------------------------------------------";
}