reference parameter « Function « C++ Tutorial

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7.4.reference parameter
	7.4.1.	Using a reference parameter.
	7.4.2.	Use reference parameters to create the swap() function.
	7.4.3.	Pass by reference by using pointer
	7.4.4.	Pass by reference using references
	7.4.5.	Returning multiple values from a function using references
	7.4.6.	Passing references to objects

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