scrib konversi suhu c++


#include <iostream.h>
             #include <conio.h>
­­
             int main()
             {
             float S,C,K,F;
             char pilih, ulang;

             start:
             clrscr();
             cout<<"[[Teknik Informatika 2e Univ. Muhammadiyah Ponorogo 2011]]"<<endl;
             cout<<"    / -----------------------------------------------\\"<<endl;
             cout<<"  <<     Selamat Datang di Program Konversi Suhu      >>"<<endl;
             cout<<"    \\------------------------------------------------/"<<endl;
             cout<<""<<endl;
             cout<<"Anda ingin menkonversi dalam apa ?"<<endl;
             cout<<"_________________________________"<<endl;
             cout<<""<<endl;
             cout<<"1. celcius - fahrenheit"<<endl;
             cout<<"2. celcius - kelvin"<<endl;
             cout<<"3. fahrenheit - celcius "<<endl;
             cout<<"4. fahrenheit - kelvin"<<endl;
             cout<<"5. kelvin - celcius"<<endl;
             cout<<"6. kelvin - fahrenheit"<<endl;
             cout<<"_________________________________"<<endl;
             cout<<""<<endl;
             cout<<"pilihan anda:"; cin>>pilih;
             cout<<"_________________________________"<<endl;
             cout<<"Masukkan besar suhu yang ingin di Konversi "<<endl;
             cout<<"Besar suhu:"; cin>>S;
             cout<<"____________________________________________________  "<<endl;
             cout<<""<<endl;
             if (pilih=='1')
             {
             F=(S*(9/5))+32;
             cout<<"jadi "<<S<<" Celcius = "<<F<<" Fahrenheit"<<endl;
             }
             else if (pilih=='2')
             {
             K=S+273.15;
             cout<<"jadi "<<S<<" Celcius = "<<K<<" kelvin"<<endl;
             }
             else if (pilih=='3')
             {
             C=(5/9)*(S-32);
             cout<<"jadi "<<S<<" Fahrenheit = "<<C<<" celcius"<<endl;
             }
             else if (pilih=='4')
             {
             K=(S + 459,67) / 1.8;
             cout<<"jadi "<<S<<" Fahrenheit = "<<K<<" Kelvin"<<endl;
             }
             else if (pilih=='5')
             {
             C=S-273.15;
             cout<<"jadi "<<S<<"Kelvin  = "<<C<<" Celcius"<<endl;
             }
             else if (pilih=='6')
             {
             F=S * 1.8 - 459;
             cout<<"jadi "<<S<<" kelvin = "<<F<<" Fahrenheit"<<endl;
             }
             else {
             cout<<"Pilihan hanya ada 6"<<endl;
             }
             cout<<"___________________________________________________________"<<endl;
             cout<<""<<endl;
             cout<<""<<endl;
             ask:
             cout<<"Ulang kembali ? (y/n)"<<endl;
             cin>>ulang;
             if(ulang=='y'||ulang=='Y')
             goto start;
             else if (ulang=='n'||ulang=='Y')
             return 0;
             else {
             goto ask;
             }
             getch ();
             }




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