Which of the following is the correct function definition header for the getAge function which is a member of the Person class? int Person::getAge( ) int getAge( ); int Person:getAge( )

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The correct function definition header for the `getAge` function, which is a member of the `Person` class, is:

```cpp
int Person::getAge()
```

**Explanation of Each Option:**

1. **`int Person::getAge()`**
   - **Correct.** This uses the **scope resolution operator (`::`)** to specify that `getAge` is a member function of the `Person` class. This is the proper way to define a member function outside the class declaration.

2. **`int getAge()`**
   - **Incorrect.** This defines a **global function** named `getAge` that is not associated with any class. It does not specify that `getAge` is a member of the `Person` class.

3. **`int Person:getAge()`**
   - **Incorrect.** This uses a **single colon (`:`)** instead of the correct **double colon (`::`)** for the scope resolution operator. The single colon is not a valid syntax for defining member functions.

**Example of Correct Usage:**

Assuming the `Person` class is declared as follows:

```cpp
class Person {
public:
    int getAge(); // Declaration inside the class
private:
    int age;
};
```

The definition outside the class would be:

```cpp
int Person::getAge() {
    return age;
}
```

This clearly indicates that `getAge` is a member function of the `Person` class and correctly accesses the `age` member variable.
The correct function definition header is: ```cpp int Person::getAge() ```

Which of the following is the correct function definition header for the getAge function which is a member of the Person class? int Person::getAge( ) int getAge( ); int Person:getAge( )

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