Error in program

Question

#include<iostream>
using namespace std;
class Mother{
public:
Mother(){}
void sayHi()
{
cout<<"say Hi!"<<endl;
}
};

class Daughter:public Mother
{
public:
Daughter(){}
};

int main()
{
Daughter d;
d.sayHi()
return 0;
}

Answer 1

Jakub's answer is right.

//Not valid: x-- The variable 'd' is only declared and gets no value. You have to initialize a new Daughter object: Daughter d = new Daughter(); --x
//No need of initialization.

Answer 2

^up it's C++, not Java. You've forgot about semicolon after d.sayHi()... it should be "d.sayHi();"