실제 개발에서 C++ 함수 오버로딩의 일반적인 사용 사례는 무엇입니까?

class Animal {
public:
    virtual void speak() {}
};

class Dog : public Animal {
public:
    void speak() override { std::cout << "Woof!" << std::endl; }
};

class Cat : public Animal {
public:
    void speak() override { std::cout << "Meow!" << std::endl; }
};

int main() {
    Animal* dog = new Dog();
    dog->speak();  // 输出: "Woof!"

    Animal* cat = new Cat();
    cat->speak();  // 输出: "Meow!"
}

void print_info(const std::string& name) {
    std::cout << "Name: " << name << std::endl;
}

void print_info(const std::string& name, int age) {
    std::cout << "Name: " << name << ", Age: " << age << std::endl;
}

int main() {
    print_info("John");  // 输出: "Name: John"

    print_info("Mary", 25);  // 输出: "Name: Mary, Age: 25"
}

int add(int a, int b);  // 重载 1
double add(double a, double b);  // 重载 2

int main() {
    int result1 = add(1, 2);   // 调用重载 1
    double result2 = add(1.5, 2.5);  // 调用重载 2
}