Contoh Listing Fungsi Garis dan Hitung pada C++

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//membuat fungsi garis
garis()
{
cout<<"-----------------------------------------"<<endl;
}
//membuat fungsi hitung
float hitung(float a, float b)
{
return(a*b);
}
//membuat fungsi bayar
float bayar(float a, float b)
{
return(a+b);
}



//program utama
main()
{
char np[20], *nk[30], kd[30], lagi;
float hrg[30], jml[30], byr[30], tb=0;
int i, j;
awal:
clrscr();

cout<<"           TOKO KUE \"WUEENAK\""<<endl;
cout<<"JL. Kalibata Timur No.37 telp (021) 7901074"<<endl;
garis();
cout<<"Masukan Nama Pembeli   : ";cin>>np;
cout<<"Masukan Jumlah Data    :  ";cin>>j;
cout<<endl;
for(i=1;i<=j;i++)
{
cout<<"Data ke-  "<<endl;
cout<<"Kode Kue   : ";cin>>kd[i];
if(kd[i]=='A'||kd[i]=='a')
  {
  nk[i]="Brownies";
  hrg[i]=15000;
  }
  else if(kd[i]=='B'||kd[i]=='b')
  {
  nk[i]="Cake";
  hrg[i]=25000;
  }
  else if(kd[i]=='C'||kd[i]=='c')
  {
  nk[i]="Keju";
  hrg[i]=20000;
  }
  else
  {
  cout<<"\tkode yang anda masukan salah!!!, input [A/B/C]! "<<endl;
  cout<<endl<<endl;
  cout<<"\tMau input data lagi [Y/T] = ";cin>>lagi;
  if(lagi=='Y'||lagi=='y')
      goto awal;
  else
      goto akhir;
}
cout<<"  Nama Kue             : "<<nk[i]<<endl;
cout<<"  Harga Kue            : "<<hrg[i]<<endl;
cout<<"  Jumlah Beli          : ";cin>>jml[i];
byr[i]= hitung(jml[i],hrg[i]); //deklarasi fungsi hitung
cout<<"  Jumlah Bayar         : "<<byr[i]<<endl;
tb=bayar(byr[i],tb); //deklarasi fungsi bayar
}
clrscr();
cout<<endl<<endl;

cout<<"     LAPORAN PENJUALAN TOKO KUE \"WUEENAAK\""<<endl;
cout<<" JL. Cileduk Raya No.168 telp (021) 7901074"<<endl;
cout<<endl;
cout<<" Nama Pembeli    : "<<np<<endl;
cout<<" ================================================"<<endl;
cout<<" No.   Kode    Nama    Harga    Jumlah    Jumlah "<<endl;
cout<<"       Kue     Kue     Kue      Beli      Bayar  "<<endl;
cout<<" ================================================"<<endl;
for(i=1;i<=j;i++)
{
  cout<<setiosflags(ios::left)<<setw(5)<<i;
  cout<<setiosflags(ios::left)<<setw(6)<<kd[i];
  cout<<setiosflags(ios::left)<<setw(10)<<nk[i];
  cout<<setiosflags(ios::left)<<setw(12)<<hrg[i];
  cout<<setiosflags(ios::left)<<setw(6)<<jml[i];
  cout<<setiosflags(ios::left)<<setw(10)<<byr[i]<<endl;
}
cout<<"================================================="<<endl;
cout<<"                                Total Bayar   : "<<tb<<endl;

cout<<endl<<endl;
cout<<"\tMau input data lagi [Y/T] = ";cin>>lagi;
  if(lagi=='Y'||lagi=='y')
      goto awal;
  else
      goto akhir;
akhir:
clrscr();
cout<<endl;
cout<<"TERIMA KASIH ATAS KEDATANGANNYA";
getch();
}

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