Program Hotel dengan if didalam if (if terangsang) dan array.

Program berikut tentang if terangsang dengan inputan array didalamnya, dengan beberapa perhitungan (tapi tidak menggunakan fungsi), program yang sangat sederhana,, :D

#include 
#include 
#include 
#include 
void main()
{
 long int hrg[20],by[20],bt[20];
 int a, z, lma[20],kls[20];
 char kmr[20],nm[20][20];
 char *nakam[20];
 char *kt[20],*sovr;
 cout<<"  ********* HOTEL PENGINAPAN *********\n";
 cout<<"Mau memasukkan berapa data ? ";
 cin>>a;

 for (z=1;z<=a;z++)
 {
 cout<<"Nama Penyewa ke - "<<<"      : ";
 cin>>nm[z];
 cout<<"Kode Kamar  A/B/C ke - "<<<" : ";
 cin>>kmr[z];
 cout<<"Kode Kelas  1/2/3 ke - "<<<" : ";
 cin>>kls[z];
 cout<<"Lama Menginap    : ";cin>>lma[z];
 }

 for (z=1;z<=a;z++)
 {

  if (kmr[z]=='A')
   {
    if (kls[z]==1)
    {
     nakam[z] = "Anyelir";
     kt[z] = "VIP";
     hrg[z] = 350000;
    }
  if (kls[z]==2)
   {
    nakam[z] = "Anyelir";
    kt[z] = "Kelas 1";
    hrg[z] = 250000;
   }
  if (kls[z]==3)
   {
    nakam[z] = "Anyelir";
    kt[z]= "Kelas 2";
    hrg[z] = 150000;
   }
  }

  if (kmr[z]=='B')
   {
    if (kls[z]==1)
    {
     nakam[z] = "Cempaka";
     kt[z] = "VIP";
     hrg[z] = 500000;
    }
    if (kls[z]==2)
     {
      nakam[z] = "Cempaka";
      kt[z] = "Kelas 1";
      hrg[z] = 400000;
     }
    if (kls[z]==3)
     {
      nakam[z] = "Cempaka";
      kt[z] = "Kelas 2";
      hrg[z] = 300000;
     }
   }

    if (kmr[z]=='C')
     {
      if (kls[z]==1)
       {
        nakam[z] = "Melati";
        kt[z] = "VIP";
        hrg[z] = 1000000;
       }
      if (kls[z]==2)
       {
        nakam[z] = "Melati";
        kt[z] = "Kelas 1";
        hrg[z] = 750000;
       }
      if (kls[z]==3)
       {
        nakam[z] = "Melati";
        kt[z] = "Kelas 2";
        hrg[z] = 650000;
       }
    }
      

  by[z]=hrg[z]*lma[z];
  bt[z]=by[z]+75000;
   if (lma[z]>=7)
   {
    sovr="Free Launce(makan Siang)";
   }
    if (lma[z]<=7)
     {
      sovr=" ";
     }
 }
    
    
 cout<<<"\n      ++++++++++++++++++++++++++++++++++++++++++++++";
 cout<<"\n                    HOTEL PENGINAPAN";
 cout<<"\n      JL. PANGKAL PERJUANGAN RT05 RW 00";
 cout<<"\n        KARAWANG BARAT. KAB. KARAWANG. JAWA BARAT";
 cout<<"\n      ++++++++++++++++++++++++++++++++++++++++++++++";
 cout<<"\n      NO  NAMA      N. KAMAR   KELAS ";
    cout<<"\n      ++++++++++++++++++++++++++++++++++++++++++++++";
 
 for (z=1;z<=a;z++)
 {
 
 cout<<"\n      "<<<"          "<<<"          "<<<"        "<<<"   \n";
 
 }
}