Why the void function setName can change the value of name?

Question

If the variable name isn't in the block code of the function.

Answer 1

Assuming you have variable <name> declared in class body (not within any of the methods); a method will have access to the <name> variable.

Note that there is this access modifier thing, it differentiates which are class variables/methods and which are instance variables/methods.

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Answer 2

A void function is not a const function.