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why copy constructor is passed by reference

Sarthak Sundriyal answered on September 6, 2022 Popularity 3/10 Helpfulness 7/10

answer why copy constructor is passed by reference

why copy constructor is passed by reference

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Passing by value (rather than by reference) means a copy needs to be made. 
So passing by value into your copy constructor means you need to make a copy
before the copy constructor is invoked, but to make a copy you first 

If the argument is passed by value, its copy constructor would call itself
to copy the actual parameter to formal parameter. This process would go on 
until the system runs out of memory. So, we should pass it by reference , 
so that copy constructor does not get invoked.

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Contributed on Sep 06 2022

Sarthak Sundriyal

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why copy constructor is passed by reference

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