How Does Default Initialization Affect Class Member Variables in C ?

How Default Initialization Affects Class Members

When class members are not explicitly initialized, their initialization follows specific rules.

Objects:

• Default constructors are invoked for objects.
• Example: std::strings are initialized to empty strings.

Primitive Types:

• No initialization is performed.
• They retain the existing memory content, which may be arbitrary values.

References:

• References must be initialized; otherwise, compilation errors occur.

In the provided example class:

• ptr (pointer) and pname (pointer-to-pointer): Contain undetermined values.
• name (string): Initializes to an empty string.
• rname and crname (references): Cannot be initialized by default, resulting in compilation errors.
• age (int): Contains arbitrary data.

Understanding these default initialization rules is crucial for writing robust and error-free programs.

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