Program C++ Input dan Hapus Data dalam Array

#include <conio.h>
#include <iostream>
using namespace std;
//mendeklarasikan tipe data.
struct data{
char nama[20];};
data batas[100];
int a,b,c,d;
//bismillah, yo bisa yo
void inputdata()
{    cout<<"\nJumlah data yang akan diinput [1 - 100++] : ";cin>>b;
   d=0;
   for(c=0;c<b;c++){
   d=d+1;
   cout<<"\nData ke-"<<d<<endl;
   cout<<"Nama\t: ";cin>>batas[a].nama;
   //input data tidak support spasi, maaf belum nemu solusinya. hh

   a++;}system("cls");}



void lihatdata()
{int i,j;
 cout<<"\n================================= Lihat Data =================================\n\n";
 cout<<"-------------------------------------------------------------------------------\n";
 cout<<"||\tData ke-\t|||\tNama\t\t||\n";
 j=0;
 for(i=0;i<a;i++)
 {j=j+1;
  cout<<"..............................................................................\n";
  cout<<"||\t"<<j<<"\t\t||\t";
  cout<<batas[i].nama<<"\t\t||"; cout<<endl;
  }
  cout<<".............................................................................. ";getch();system("cls");}

void caridata()
{
int n,l;
cout<<"-------------------------------------------------------------------------------\n";
cout<<"\tCari Data Indeks ke- : ";cin>>n;
 cout<< "\tHasil = " << batas[n].nama; cout<<endl;

}

void hapusdata()
{int x,y;
 cout<<"Hapus data ke-";cin>>x;
 y=x-1;
 a--;
 for(int i=y;i<a;i++)
 {batas[i]=batas[i+1];}
 system("cls");
 cout<<"\n\n\n\n\n\n\n\n\n++++++++++++++++++++++++++++++ Hore.. Data ke-"<<x<<" Berhasil dihapus ++++++++++++++++++++++++++++++";
 getch();system("cls");
}

void editdata(){
int k,l;
cout<<"Mau edit data yang ke- : ";cin>>k;
l=k-1;
cout<<"Nama\t: ";cin>>batas[l].nama;

lihatdata();
}
//semangat kall
int main(){
     int pilih;
     char w;
    cout<<"\t----------------------------------------------------------------\n";
    cout<<"\t-----------------......... Bismillah ..........------------------\n";
    cout<<"\t------------------Code by : www.idnpedia.com----------------------\n";
    cout<<"\t----------------------------------------------------------------\n";
    getch ();
    system("cls");

    //bismillah, smgt kall,, yoo bisa yo..
  awal:
  cout<<"\n================================ MENU PILIHAN12 =================================";
  cout<<"\n1. Masukkan data";
  cout<<"\n2. Tampilkan Data";
  cout<<"\n3. Edit Data";
  cout<<"\n4. Hapus Data";
  cout<<"\n5. Cari Data";
  cout<<"\n6. Keluar";
  cout<<"\n\nMasukkan Pilihan : ";
  cin>>pilih;
  if(pilih==1)
   {system("cls");inputdata();goto awal;}
  if(pilih==2)
   {system("cls");lihatdata();goto awal;}
  if(pilih==3)
   {system("cls");editdata();goto awal;}
  if(pilih==4)
   {system("cls");hapusdata();goto awal;}
  if(pilih==5)
   {system("cls");caridata();goto awal;}
  if(pilih==6)
   {system("cls");
    //membuat menu pilihan keluar
    cout<<"\nYakin kak mau keluar dari Program? {Y / N] : \n" ; cin >> w;
    if(w=='y'||w=='Y')
    {system("cls");
     cout<<"\n\n\n\n\n............................ Hore Selesai ............................... \n";}
    if(w=='n'||w=='N')
           {system("cls");goto awal;}}
  else
   {system("cls");cout<<"Pilihan 1-6";getch();system("cls");goto awal;}
}