函数：显式具体化模板函数 引用结构

#include <iostream>

template <typename T>
void Swap(T &a, T &b);

struct job
{
	char name[40];
	double salary;
	int floor;
};
template <> void Swap<job>(job &j1, job &j2);
void Show(job &j);

int main(void)
{
	using std::cout;
	using std::ios;

	cout.precision(2);
	cout.setf(ios::fixed, ios::floatfield);
	
	int i=10, j=20;
	cout << "i,j = " << i << ", " << j << ".\n";
	cout << "Using compiler-generated int swapper:\n";
	Swap(i,j);
	cout << "Now i, j = " << i << ", " << j << ".\n";
	
	job sue={"Susan Yaffee", 73000.60, 7};
	job sidney={"Sidney Taffee", 78060.72, 9};
	cout << "Before job swapping:\n";
	Show(sue);
	Show(sidney);
	Swap(sue, sidney);
	cout << "After job swapping:\n";
	Show(sue);
	Show(sidney);
	
	return 0;
}

template <typename T>
void Swap(T &a, T &b)
{
	T temp;
	temp = a;
	a = b;
	b = temp;
}

template <> void Swap<job>(job &j1, job &j2)
{
	double t1;
	int t2;
	t1=j1.salary;
	j1.salary=j2.salary;
	j2.salary=t1;
	t2=j1.floor;
	j1.floor=j2.floor;
	j2.floor=t2;
}
void Show(job &j)
{
	using std::cout;
	
	cout << j.name << ": $" << j.salary
	     << " on floor " << j.floor << '\n';
}