Contoh Program C++ Hitung Biaya Air PDAM

#include <iostream>
#include <conio.h>
using namespace std;
int main () {
    char nama[20];
    int pakai, a, b, c, d, biaya;
    cout<<"\t----------------------------------------------------------------\n";
    cout<<"\t-----------------Program menghitung biaya Air------------------\n";
    cout<<"\t--------------------Author : www.idnpedia.com---------------------\n";
    cout<<"\t----------------------------------------------------------------\n";

    getch ();
    cout << "\n..............................................";
    cout << "\nMasukkan name pelanggan = "; gets (nama);
    cout << "Masukkan penggunaan air (m3) = "; cin >> pakai;
    //mulai sulit boskuuu
                a=10;
                b=0;
                c=0;
                d=0;

   if (pakai>30)
   {            b=10; c=10; d=pakai-30;         }
   else if (pakai>20)
   {            b=10; c=pakai-20;   }
   else if (pakai>10)
   {            b=pakai-10;             }



   biaya= ((a*2000)+(b*3000)+(c*4000)+(d*5000)+10000);

    cout << "\n..............................................";
    cout << "\nTotal tagihan anda = " <<biaya;


}