c19_01.cpp

it can help you use C++ program we

//函数模板的使用
#include <iostream >
using namespace std;

template <class T>		//定义模板函数
void Swap(T& a, T& b)
{
	T	c;
	c = a; 
	a = b;
	b = c;
}

int main()
{
	int  a=10,b=20;
	cout << "a = "<<a << ",b = " << b <<endl;

	Swap(a,b);
	cout << "after swap \n";
	cout << "a = "<<a << ",b = " << b <<endl;
	cout << endl;

	float c=1.2f,d=3.4f;
	cout << "c = "<<c << ",d = " << d<<endl;

	Swap(c,d);
	cout << "after swap \n";
	cout << "c = "<<c << ",d = " << d<<endl;
	cout << endl;

	return 0;
}