import jeliot.io.*;

public class BalikAngka {
public static void balik(int n)
{
    int temp = 0;
    while (n>0)
    {
          temp = temp * 10 + n % 10;
          if (temp == 0)
          {
              System.out.print("0");
          }
          n = n/10;
    }
    System.out.print(temp);
}

public static void main()
{
    int bil;
    System.out.print("Masukkan bilangan : ");
    bil = Input.readInt();
    System.out.print("Setelah dibalik : ");
    balik(bil);
}
}

POM BENSIN

#include <cstdlib>
#include <iostream>
#include <time.h>
#include <math.h>
#include <iomanip>
using namespace std;
class SPBU{
private:
float rp;
float ltr;
int jum;
float litlit;
int jum1;
float bensin,bensin2,bensin3,bensin4;

public:
float menu();
float liter();
void rupiah();
double  ulang();
void wait (float seconds);
};
float SPBU::menu(){
char pil;
cout<<”\b”;

cout<<”\a\t\t+\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\5\5\5\5\5\5\5\5+\n”;
cout<<”\t\t\3                                               \3\n”;
cout<<”\t\t\3 SELAMAT DATANG DI POM BENSIN PASTI PAS BANGET \3\n”;
cout<<”\t\t\3                                               \3\n”;
cout<<”\t\t+\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\5\5\5\5\5\5\5\5\5+\n”;
cout << “\t\t      +———————————–+” << endl;
cout << “\t\t      |                MENU               |” << endl;
cout << “\t\t      +———————————–+” << endl << endl;
cout<<”\t\t\t\tSilahkan Pilih: \n”;
cout<<”\t\t\t\t1. Rupiah”<<endl;
cout<<”\t\t\t\t2. Liter”<<endl;
cout<<”\t\t\t\t3. Exit”<<endl;
cout<<”\t\t\t\t==================”<<endl;
cout<<”\t\t\t\tMasukkan Pilihan: “;cin>>pil;
pil=toupper(pil);
while(!((pil==’1′)||(pil==’2′)||(pil==’3′))){
cout<<”Pilian SALAH\nPilihan diluar jangkauan..!\nPilih nomor 1-3\n”;
cout<<”Pilih salah satu:”;cin>>pil;
pil=toupper(pil);
}
switch(pil){
case ’1′: rupiah(); break;
case ’2′: liter(); break;
case ’3′: cout<<”Terima Kasih\n”; system(“exit”); break;
default: cout<<”Terimakasih”<<endl;
}
}

luas lingkaran dan volume

#include <cstdlib>
#include <iostream>
#define pi 3.14
#include <math.h>

using namespace std;
class hitung{
friend ostream& operator<<(ostream&, const hitung&);
friend istream& operator>>(istream&, hitung&);

public:
hitung();
void luaslingkaran(){luas=pi*r*r;}
void volumebola(){volume=((pi*r*r*r)/3);}
private:
int r;
float luas;
float volume;
};

jarak 2 titik in c++

#include <cstdlib>
#include <iostream>
#include <math.h>
#include <conio.h>

using namespace std;
class jarak {
public :
void baca1();
void baca2();
void tulis1();

private :
double a1,a2,a3,a4;
};
void jarak::baca1 (){
cout<<”Masukkan X1 :”;cin>>a1;
cout<<”Masukkan Y1 :”;cin>>a2;
cout<<”Masukkan X2 :”;cin>>a3;
cout<<”Masukkan Y2 :”;cin>>a4;
cout<<endl;
}

#include <cstdlib>
#include <iostream>

using namespace std;
class kfb {
      public:
             void data();
             void rumus1();
             void cetak();
      private:
              int i,kpk;
              int m,n,r;
              };
void kfb::data(){
cout << "Masukkan nilai A : ";
cin >> m;
cout << "Masukkan nilai B : " ;
cin >> n;
}
void kfb::rumus1(){
r = m%n;
while (r!=0)
{
m = n;
n = r;
r = m%n;
}
}

void kfb::cetak(){
cout <<"FPB A dan B adalah : "<<n<<endl;
}
int main(int argc, char *argv[])
{
    kfb a;
    a.data();
    a.rumus1();
    cout<<endl;
    a.cetak();
   
    system("PAUSE");
    return EXIT_SUCCESS;
}

Program Mencari Total Dari 1-n #include <iostream.h>

#include <conio.h>

class total

{

friend istream & operator >> ( istream &, total& );

friend ostream & operator<< ( ostream &, total& );

public:

total();

void tambah(){jumlah = 0;

for (i = 1; i<=n; i++)

jumlah += i;

}

private:

int n,i,jumlah;

};

total::total()

{cout<<"PROGRAM MENCARI TOTAL DARI 1 - N"<<endl;

};

istream & operator >> ( istream & in, total & msuk )

{

cout << "masukkan bilangan  : " ;

in >> msuk.n;

return in;

}

ostream & operator<< ( ostream &out, total& keluar)

{

out<<"hasilnya totalnya = "<<keluar.jumlah<<endl;

return out;

}

main()

{

total hu;

cin >> hu;

hu.tambah();

cout<<hu;

getch();

return 0;

}