c++ - what's the meaning of *& -

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i java coder , not familar c++ language. right now,i read following code:

void method(a* a,a*& b);  *a; *b; method(a,b);

and question is: what's meaning of "*&"?does means represent value of b itself? thx

b reference pointer of a.

so if method sets b, b in scope of call changed.


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