Write C++ Program with base class convert declares two variables, val1 and val2, which hold the initial and converted values, respectively. It also defines the functions getinit( ) and getconv( ), which return the initial value and the converted value. These elements of convert are fixed and applicable to all derived classes that will inherit convert. However, the function that will actually perform the conversion, compute( ), is a pure virtual function that must be defined by the classes derived from convert. The specific nature of compute( ) will be determined by what type of conversion is taking place.

/*
Prof.Parchure S.V.
*/
#include <iostream>
using namespace std;
class convert
{
    protected:
double val1;
double val2;
public: convert(double i)
{
    val1 = i;
}
double getconv()
{
    return val2;
}
double getinit()
{
    return val1;
}
virtual void compute() = 0;
};

class l_to_g : public convert
{
public:
l_to_g(double i) : convert(i)
{
}
void compute()
{
    val2 = val1 / 3.7854;
}
};
// Fahrenheit to Celsius
class f_to_c : public convert
{
public:
f_to_c(double i) : convert(i)
{
}
void compute()
{
val2 = (val1-32) / 1.8;
}
};

int main()
{
convert *p;
l_to_g lgob(4);
f_to_c fcob(70);

 p = &lgob;
cout<< p->getinit() << " liters is ";
p->compute();
cout<< p->getconv()<< " gallons\n";
p = &fcob;
cout<< p->getinit() << " in Fahrenheit is ";
p->compute();
cout<< p->getconv()<< " Celsius\n";
return 0;
}