[C++程序设计]函数模板

定义函数模板的一般形 式为

template < typename T> 或 template <class T>

函数模板: 函数参数个数,函数体相同.参数类型不同

函数重载: 函数参数个数,类型不同.与函数类型(返回值)无关

 #include <iostream>
 using namespace std;

 template<typename T>
 T max(T a, T b, T c)
 {
     if(b > a) a = b;
     if(c > a) a = c;
     return a;
 }

 int main()
 {
     int x, y, z, m;
     cout << "please enter three integer numbers:" << endl;
     cin >> x >> y >> z;
     m = max(x, y ,z);
     cout << "integer of max is " << m << endl;

     double x1, y1, z1, m1;
     cout << "please enter three double numbers:" << endl;
     cin >> x1 >> y1 >> z1;
     m1 = max(x1, y1 ,z1);
     cout << "double of max is " << m1 << endl;

     long x2, y2, z2, m2;
     cout << "please enter three long numbers:" << endl;
     cin >> x2 >> y2 >> z2;
     m2 = max(x2, y2 ,z2);
     cout << "long of max is " << m2 << endl;
     return ;
 }