program kalkulator

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

class kalkulator {
friend istream& operator >> (istream&, kalkulator&);
friend ostream& operator << (ostream&, const kalkulator&);



public :
kalkulator();

     void menu();
     int tambah();
     int kurang();
     int kali();
     float bagi();
     float perx();

private:
  float a,b,c,hasil;
};

istream& operator>>(istream& in, kalkulator& masuk){
  cout<<"\t Selamat datang di program kalkulator sederhana ini \n";
  cout<<"\t                Selamat mencoba                     \n";
  cout<<"\t          Semoga Bermanfaat untuk Kalian            \n"<<endl;
  cout<<"\t       ==================================== \n";
  cout<<"\t      |    PROGRAM KALKULATOR SEDERHANA    |\n";
  cout<<"\t      |  by ANDI FAISAL (12201398)  |\n";
  cout<<"\t      |            STIMIK ASIA      |\n";
  cout<<"\t       ==================================== \n"<<endl;
  cout<<"*********************************************\n";
  cout<<"|              KALKULATOR                   |\n";
  cout<<"*********************************************\n";
  cout<<"|  ___   ___   ___   ___   ___   ___     |\n";
  cout<<"| |x^2| | / | | + | | 7 | | 8 | | 9 | \n";
  cout<<"| |___| |___| |___| |___| |___| |___| \n";
  cout<<"|  ___   ___   ___   ___   ___   ___     |\n";
  cout<<"| |x^3| |1/x| | - | | 4 | | 5 | | 6 | \n";
  cout<<"| |___| |___| |___| |___| |___| |___| \n";
  cout<<"|  ___   ___   ___   ___   ___   ___     |\n";
  cout<<"| | n!| |x^y| | * | | 1 | | 2 | | 3 | \n";
  cout<<"| |___| |___| |___| |___| |___| |___| \n";
  cout<<"|  ___   ___   ___   ___   ___   ___     |\n";
  cout<<"| |CE | | C | | . | | 0 | |+/-| | = | \n";
  cout<<"| |___| |___| |___| |___| |___| |___| \n";
  cout<<"|___________________________________________|\n"<<endl;
  cout<<"1. Tambah\n";
  cout<<"2. Kurang\n";
  cout<<"3. Kali\n";
  cout<<"4. Bagi\n";
  cout<<"5. Per x\n";
  cout<<"6. Keluar\n"<<endl;

  cout<<"Masukan pilihan anda : ";
  int pilihan;
  cin>>pilihan;

  if (pilihan==1)
  {
    masuk.tambah();}
    else if (pilihan==2)
    {
      masuk.kurang();}
      else if (pilihan==3)
      {
        masuk.kali();}
        else if (pilihan==4)
        {
          masuk.bagi();}
          else if (pilihan==5)
          {
            masuk.perx();}
           else if (pilihan==6)
           {

              cout<<"Anda telah keluar dari program"<<endl;}
            else
              cout<<"Inputan Anda Salah\n";


  return in;
}

ostream& operator<<(ostream& out, const kalkulator& keluar){

  out<<"\t                Terima Kasih....:)"<<endl;
  return out;}

  kalkulator::kalkulator(){}  //konstruktor

int kalkulator::tambah(){
  cout<<"Masukan bilangan pertama : ";
  cin>>a;
  cout<<"Masukan bilangan kedua : ";
  cin>>b;
  hasil = a+b;
  cout<<"Hasil tambah "<<a<<" + "<<b<<" = "<<hasil<<endl;}

int kalkulator::kurang(){
  cout<<"Masukan bilangan pertama : ";
  cin>>a;
  cout<<"Masukan bilangan kedua : ";
  cin>>b;
  hasil=a-b;
  cout<<"Hasil kurang "<<a<<" - "<<b<<" = "<<hasil<<endl;}

int kalkulator::kali(){
  cout<<"Masukan bilangan pertama : ";
  cin>>a;
  cout<<"Masukan bilangan kedua : ";
  cin>>b;
  hasil=a*b;
  cout<<"Hasil kali "<<a<<" * "<<b<<"= "<<hasil<<endl;}

float kalkulator::bagi(){
  cout<<"Masukan bilangan pertama : ";
  cin>>a;
  cout<<"Masukan bilangan kedua : ";
  cin>>b;
  hasil=a/b;
  cout<<"Hasil bagi "<<a<<" dan "<<b<<"= "<<hasil<<endl;}

float kalkulator::perx(){
  cout<<"Masukan bilangan : ";
  cin>>a;

hasil=1/a;
  cout<<"Hasil 1 per x = "<<hasil<<endl;}

int main(){
  kalkulator indri;
  cin>>indri;
  cout<<indri;
  getch();
  return 0;
}