template <類型形式參數(shù)表> 返回類型  函數(shù)名(形參)
{
  //函數(shù)實(shí)現(xiàn)
}

#include <cstdio>
#include <iostream>
using namespace std;
//函數(shù)模板
template <class T>
T max(T & a, T & b)  
{
 return a > b ? a : b;
}
int main(void)
{
 int x, y;
 x = 1;
 y = 4;
 cout << "max = " << max<int>(x, y) << endl;
 cout << "max = " << max<double>(1.234, 5.567) << endl;
 cout << "max = " << max(21.234f, 51.567f) << endl;
 return 0;
}