函数模版

函数模版：

函数模版是通用的函数描述，也就是说，它们使用通用类型来定时函数，其中的通用类型可用具体的类型替换。通过将类型作为参数传递给模版，可使编译器生成该类型的函数。写个小例子如下：

  1 #include <iostream>  2 using namespace std;  3  4 // function template prototype  5 template <class Any>  6 void Swap(Any &a, Any &b);  7  8 int main()  9 { 10     int i = 10; 11     int j = 20; 12     cout << "i, j = " << i << ", " << j << ".\n"; 13     cout << "Using complier-generated int Swap:\n"; 14     Swap(i, j); 15     cout << "i, j = " << i << ", " << j << ".\n"; 16 17     double a = 23.12; 18     double b = 3.14; 19     cout << "a, b = " << a << ", " << b << ".\n"; 20     cout << "Using complier-generated double Swap:\n"; 21     Swap(a, b); 22     cout << "a, b = " << a << ", " << b << ".\n"; 23 24     return 0; 25 } 26 27 template <class Any> 28 void Swap(Any &a, Any &b) 29 { 30     Any temp = a; 31     a = b; 32     b = temp; 33 }~

运行效果如下：

谢谢！