Coding With Joseph

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C++ Quiz #36

Object Slicing

mediumPolymorphism

The programmer expects this to print "Cat meows", but it prints "Animal speaks" instead. What went wrong?

📄 Code

1#include <iostream>
2using namespace std;
3 
4class Animal {
5public:
6    virtual void speak() {
7        cout << "Animal speaks" << endl;
8    }
9};
10 
11class Cat : public Animal {
12public:
13    void speak() override {
14        cout << "Cat meows" << endl;
15    }
16};
17 
18void makeSound(Animal a) {  // pass by value
19    a.speak();
20}
21 
22int main() {
23    Cat c;
24    makeSound(c);
25    return 0;
26}