percabangan IF (UTS sem 1) BSI

#include <stdio.h>
#include <conio.h>
#include <iostream.h>
main()
{
int by_inap,lama_inap,tobay,discount,total,ubay,ukem,inap;
char nm_petugas[30],nm_cust[30],kd_kamar[1],jns_kamar[50];
cout<<"\t********===========**********"<<endl;
cout<<"\tLosmen ''Rainbow'' Inn"<<endl;
cout<<"\tNota booking Kamar Losmen"<<endl;
cout<<"\t==================================="<<endl;
cout<<"Input Nama Petugas\t:";cin>>nm_petugas;
cout<<"\nInput Nama Customer\t:";cin>>nm_cust;
cout<<"Input Kode Kamar[S/D/F]\t:";cin>>kd_kamar;
cout<<"Input Lama Inap\t:";cin>>inap;
if(strcmpi(kd_kamar,"S")==0)
    {
    strcpy(jns_kamar,"Standart Room - Singgle Band");
   by_inap=125000;
   }
else if(strcmpi(kd_kamar,"D")==0)
    {
    strcpy(jns_kamar,"Delux Room - Double Bad,include Breakfast");
   by_inap=225000;
   }
else
    {
   strcpy(jns_kamar,"family Room - Extra Bad,include Breakfast");
   by_inap=270000;
   }
clrscr();
cout<<"\t********===========**********"<<endl;
cout<<"\tLosmen ''Rainbow'' Inn"<<endl;
cout<<"\tNota booking Kamar Losmen"<<endl;
cout<<"\n\t==================================="<<endl;
cout<<"\nNama Petugas\t:";cout<<nm_petugas;
cout<<"\nNama Customer\t:";cout<<nm_cust;
cout<<"\nJenis Kamar\t:";cout<<jns_kamar;
cout<<"\nBiaya inap\t:";cout<<by_inap;
cout<<"\nLama Inap\t:";cout<<inap;
tobay=by_inap*inap;
cout<<"\n==================================="<<endl;
cout<<"\n\t\tTotal Bayar\t:";cout<<tobay;
if(inap>3)
{
discount=0.05*tobay;
}
else
{
if(inap<3)
{
discount=0;
}
}
cout<<"\n\t\tdiscount\t:";cout<<discount;
total=tobay-discount;
cout<<"\n\t\tGrand Total\t:";cout<<total;
cout<<"\n\t\tUang Bayar\t:";cin>>ubay;
ukem=ubay-total;
cout<<"\n\t\tuang Kembali\t:";cout<<ukem;
getch();
}