// Example 5-6：重載絕對值函數
#include <iostream.h>
int abs(int x)
{
	return x>0?x:-x;
}
double abs(double x)
{
	return x>0?x:-x;
}
long abs(long x)
{
	return x>0?x:-x;
}
void main()
{
	int x1 = 1;
	double x2 = 2.5;
	long x3 = 3L;
	cout << "|x1| = " << abs(x1) << endl;
	cout << "|x2| = " << abs(x2) << endl;
	cout << "|x3| = " << abs(x3) << endl;
}