function template c 2b 2b

1template <class T>
2void swap(T & lhs, T & rhs)
3{
4 T tmp = lhs;
5 lhs = rhs;
6 rhs = tmp;
7}

1template <class T>
2void swap(T & lhs, T & rhs)
3{
4 T tmp = lhs;
5 lhs = rhs;
6 rhs = tmp;
7}
8
9void main()
10{
11  int a = 6;
12  int b = 42;
13  swap<int>(a, b);
14  printf("a=%d, b=%d\n", a, b);
15  
16  // Implicit template parameter deduction
17  double f = 5.5;
18  double g = 42.0;
19  swap(f, g);
20  printf("f=%f, g=%f\n", f, g);
21}
22
23/*
24Output:
25a=42, b=6
26f=42.0, g=5.5
27*/

1template class  Graph<string>;

1// template specialization
2#include <iostream>
3using namespace std;
4
5// class template:
6template <class T>
7class mycontainer {
8    T element;
9  public:
10    mycontainer (T arg) {element=arg;}
11    T increase () {return ++element;}
12};
13
14// class template specialization:
15template <>
16class mycontainer <char> {
17    char element;
18  public:
19    mycontainer (char arg) {element=arg;}
20    char uppercase ()
21    {
22      if ((element>='a')&&(element<='z'))
23      element+='A'-'a';
24      return element;
25    }
26};
27
28int main () {
29  mycontainer<int> myint (7);
30  mycontainer<char> mychar ('j');
31  cout << myint.increase() << endl;
32  cout << mychar.uppercase() << endl;
33  return 0;
34}

1template<class T1 , class T2>
2float fun(T1 a, T2 b){
3    float avg2 = (a+b)/2.0;
4    return avg2;
5}