Chellange questions query

Question

What is the output of this code?

class A{
public:
int f()
{
cout << 3;
}
int f(int x)
{ cout << x; }
};

class B: public A{ public:

int f() { cout << 5; }

}; int main() { B ob; ob.f(7);}

Output is compiled time error how??

Answer 1

the methods f are defined as ( int) but there is no return.
you don't have to redefine f method in class B since it is inherited from A.

Answer 2

#include <iostream>
using namespace std;

class A{
public:
void f()
{
cout << 3;
}
void f(int x)
{ cout << x; }
};

class B: public A{ public:

//void f(){ cout << 5; }

};

int main() {
B ob;
ob.f(7);
return 0;
}