Why must the formal parameters of the copy constructor be set to a reference type?

闪电玩家

It's already very clear,
Value transfer requires calling the copy constructor, the original function itself is a copy constructor, infinite recursion

goodjianli

Is there only one reason for the infinite loop? Not right

boxer2005

boxer2005

This is an old question, I have seen it at least n times.

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If it is not a reference,
Then the parameter itself needs to copy an object,
The copy of the object needs to call the copy structure,
The parameter of the copy construction is an object again, and the copy construction is called again...

Endless loop. . .

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correct.

yigeren_jie

Actually, I don’t really understand this question. Thanks, I learned it. Hey