Mega Code Archive
Change the object pointer behaviour
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#include <iostream>
using namespace std;
class convert
{
protected:
double val1;
double val2;
public:
convert(double i)
{
val1 = i;
}
double getconv(void) {return val2;}
double getinit(void) {return val1;}
virtual void compute(void) = 0;
};
class l_to_g : public convert {
public:
l_to_g(double i) : convert(i) { }
void compute(void)
{
val2 = val1 / 3.7854;
}
};
class f_to_c : public convert {
public:
f_to_c(double i) : convert(i) { }
void compute(void)
{
val2 = (val1 - 32) / 1.8;
}
};
int main(void)
{
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." << endl;
p = &fcob;
cout << p->getinit() << " in Fahrenheit is ";
p->compute();
cout << p->getconv() << " Celsius." << endl;
}
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