Mega Code Archive
Virtual function
<![CDATA[
#include <iostream>
#include <cstdlib>
using namespace std;
class BaseClass {
public:
int i;
BaseClass(int x) {
i = x;
}
virtual void myFunction()
{
cout << "Using BaseClass version of myFunction(): ";
cout << i << '\n';
}
};
class DerivedClass1 : public BaseClass {
public:
DerivedClass1(int x) : BaseClass(x) {}
void myFunction()
{
cout << "Using DerivedClass1's version of myFunction(): ";
cout << i*i << '\n';
}
};
class DerivedClass2 : public BaseClass {
public:
DerivedClass2(int x) : BaseClass(x) {}
void myFunction()
{
cout << "Using DerivedClass2's version of myFunction(): ";
cout << i+i << '\n';
}
};
int main()
{
BaseClass *p;
DerivedClass1 derivedObject1(10);
DerivedClass2 derivedObject2(10);
int i, j;
for(i = 0; i <10; i++) {
j = rand();
if( ( j % 2 ) )
p = &derivedObject1;
else
p = &derivedObject2;
p->myFunction(); // call appropriate function
}
return 0;
}
]]>