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how do I use pointer classes in parameters?

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The term 'pointer class' is not something used very often.

If you're talking about a smart pointer class, such as std::auto_ptr or boost::shared_ptr, then their argument-passing semantics depend on which you use. All of them support pass-by-value, and some support passing by constant reference:

void function(std::auto_ptr<int> ptr);
void function(boost::shared_ptr<int> ptr);
void function(const boost::shared_ptr<int> & ptr);

If you're talking about passing a 'class pointer', you pass it like any other type (because a pointer to a class is a type like any other). For instance:
void function(std::string *ptr); // By value
void function(std::string *&ptr); // By reference

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