Program Sederhana Konversi Suhu C++ ~ H3N.BLOG

#include <iostream>
#include <cstdlib>

using namespace std;

int main ()
{

    int ok;
    float x, a, b, c;

        cout << "-Konversi Suhu-" << endl;
        cout << endl;
        cout << "Pilih suhu yang akan dikonversi :" << endl;
        cout << "1. Celcius" <<endl;
        cout << "2. Reamur" <<endl;
        cout << "3. Fahrenheit" <<endl;
        cout << "4. Kelvin" <<endl;
        cout << endl;
        cout << "Jenis Suhu yang Dipilih : ";
        cin >> ok;

        if(ok==1)
        {
            cout << "Celcius \t : ";
            cin >> x;
            a = x*4/5;
            b = (9/5*x)+32;
            c = x+273;
            cout << "_____________________" << endl;
            cout << "Reamur \t\t = " << a << endl;
            cout << "Fahrenheit \t = " << b << endl;
            cout << "Kelvin \t\t = " << a << endl;

        }
        if(ok==2)
        {
            cout << "Reamur \t : ";
            cin >> x;
            a = x*5/4;
            b = (9/4*x)+32;
            c = a+273;
            cout << "_____________________" << endl;
            cout << "Celcius \t\t = " << a << endl;
            cout << "Fahrenheit \t = " << b << endl;
            cout << "Kelvin \t\t = " << a << endl;

        }
        if(ok==3)
        {
            cout << "Fahrenheit \t : ";
            cin >> x;
            a = (x-32)*5/9;
            b = (x-32)*4/9;
            c = a+273;
            cout << "_____________________" << endl;
            cout << "Celcius \t\t = " << a << endl;
            cout << "Reamur \t = " << b << endl;
            cout << "Kelvin \t\t = " << a << endl;

        }
        if(ok==4)
        {
            cout << "Kelvin \t : ";
            cin >> x;
            a = x-273;
            b = (x-273)*4/5;
            c = (a*9/5)+32;
            cout << "_____________________" << endl;
            cout << "Celcius \t\t = " << a << endl;
            cout << "Reamur \t = " << b << endl;
            cout << "Kelvin \t\t = " << a << endl;

        }

return 0;
}