What 's wrong in this code ? I think in Inheritance I can use the protected data of other classes .

Question

#include<iostream>
using namespace std;
class code {
protected:
void jaat(){
cout<<" Haaa "<<endl; }
public:
void showdata() {
cout<<" Hello " <<endl;
}
};
class mukul:public code{
public:
void godata(){
cout<<"Mukul Nain "<<endl;
}};
int main (){
mukul obj;
obj.jaat();
obj.showdata();
cout<<"\n";
obj.godata();
return 0;
}