4.9-引用返回值.cpp

Visual C++的课件

//Listing 9.9
// Returning multiple values from a function
// using references

#include <iostream.h>

typedef unsigned short USHORT;
enum ERR_CODE { SUCCESS, ERROR };

ERR_CODE Factor(USHORT, USHORT&, USHORT&);

int main()
{
	USHORT number, squared, cubed;
	ERR_CODE result;

	cout << "Enter a number (0 - 20): ";
	cin >> number;

	result = Factor(number, squared, cubed);

	if (result == SUCCESS)
	{
		cout << "number: " << number << "\n";
		cout << "square: " << squared << "\n";
		cout << "cubed: "  << cubed   << "\n";
	}
	else
		cout << "Error encountered!!\n";
	return 0;
}

ERR_CODE Factor(USHORT n, USHORT &rSquared, USHORT &rCubed)
{
	if (n > 20)
		return ERROR;   // simple error code
	else
	{
		rSquared = n*n;
		rCubed = n*n*n;
		return SUCCESS;
	}
}