How to Correctly Declare Multiple Object Pointers in a Single Line in C ?

Declaring Multiple Object Pointers in Single Lines

In a class, the declaration of multiple object pointers in one line can lead to confusion and compiler errors. Understanding the difference between the two approaches below is crucial for correct memory management and avoiding potential issues.

Approach 1: Works Well

<code class="c++">private:
    sf::Sprite* re_sprite_eyes;
    sf::Sprite* re_sprite_body;
    sf::Sprite* re_sprite_hair;</code>

In this approach, each variable (re_sprite_eyes, re_sprite_body, *re_sprite_hair) is explicitly declared as a pointer to the corresponding object. This is a clear and straightforward way to declare multiple pointers.

Approach 2: Causes Errors

<code class="c++">private:
    sf::Sprite* re_sprite_hair, re_sprite_body, re_sprite_eyes;</code>

This approach attempts to declare all three variables as pointers, but it results in a compiler error because the variable names are not preceded by an asterisk (*). This syntax is equivalent to declaring the first variable as a pointer and the remaining variables as objects:

<code class="c++">sf::Sprite* re_sprite_hair;
sf::Sprite re_sprite_body;
sf::Sprite re_sprite_eyes;</code>

To correctly declare multiple object pointers in one line, use the following syntax:

<code class="c++">private:
    sf::Sprite *re_sprite_eyes, *re_sprite_body, *re_sprite_hair;</code>

By placing an asterisk before each variable name, it becomes explicitly declared as a pointer. This approach ensures proper memory allocation and management for each object pointer.

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