2.3.1 引用

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书中页数：P46
代码名称：ref-ex.cc

#include <iostream>
int main()
{
	int i = 0, &ri = i;  // ri is a reference to i
	// ri is just another name for i; 
	// this statement prints the value of i twice
	std::cout << i << " " << ri << std::endl;

	i = 5; // changing i is reflected through ri as well
	std::cout << i << " " << ri << std::endl;

	ri = 10; // assigning to ri actually assigns to i
	std::cout << i << " " << ri << std::endl;

	return 0;
}