Coding With Joseph

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C++ Quiz #27

Non-Virtual Method Call

easyPolymorphism

The programmer expects this code to print "Dog speaks", but it prints "Animal speaks" instead. What is the bug?

📄 Code

1#include <iostream>
2using namespace std;
3 
4class Animal {
5public:
6    void speak() {
7        cout << "Animal speaks" << endl;
8    }
9};
10 
11class Dog : public Animal {
12public:
13    void speak() {
14        cout << "Dog speaks" << endl;
15    }
16};
17 
18int main() {
19    Animal* a = new Dog();
20    a->speak();
21    delete a;
22    return 0;
23}