function template in c 2b 2b

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

1#include <iostream>
2using namespace std;
3
4template <typename T>
5void Swap(T &n1, T &n2)
6{
7	T temp;
8	temp = n1;
9	n1 = n2;
10	n2 = temp;
11}
12
13int main()
14{
15	int i1 = 1, i2 = 2;
16	float f1 = 1.1, f2 = 2.2;
17	char c1 = 'a', c2 = 'b';
18
19	cout << "Before passing data to function template.\n";
20	cout << "i1 = " << i1 << "\ni2 = " << i2;
21	cout << "\nf1 = " << f1 << "\nf2 = " << f2;
22	cout << "\nc1 = " << c1 << "\nc2 = " << c2;
23
24	Swap(i1, i2);
25	Swap(f1, f2);
26	Swap(c1, c2);
27
28        cout << "\n\nAfter passing data to function template.\n";
29	cout << "i1 = " << i1 << "\ni2 = " << i2;
30	cout << "\nf1 = " << f1 << "\nf2 = " << f2;
31	cout << "\nc1 = " << c1 << "\nc2 = " << c2;
32
33	return 0;
34}
35

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}

1// If two characters are passed to function template, character with larger ASCII value is displayed.
2
3#include <iostream>
4using namespace std;
5
6// template function
7template <typename T>
8T Large(T n1, T n2)
9{
10	return (n1 > n2) ? n1 : n2;
11}
12
13int main()
14{
15	int i1, i2;
16	float f1, f2;
17	char c1, c2;
18
19	cout << "Enter two integers:\n";
20	cin >> i1 >> i2;
21	cout << Large(i1, i2) <<" is larger." << endl;
22
23	cout << "\nEnter two floating-point numbers:\n";
24	cin >> f1 >> f2;
25	cout << Large(f1, f2) <<" is larger." << endl;
26
27	cout << "\nEnter two characters:\n";
28	cin >> c1 >> c2;
29	cout << Large(c1, c2) << " has larger ASCII value.";
30
31	return 0;
32}

1// function template in c++
2#include <iostream>
3using namespace std;
4float funAvg(int a, int b){
5    float avg = (a+b)/2.0;
6    return avg;
7}
8float funAvg2(int a, float b){
9    float avg2 = (a+b)/2.0;
10    return avg2;
11}
12
13//function template in c++
14
15template<class T1 , class T2>
16float fun(T1 a, T2 b){
17    float avg2 = (a+b)/2.0;
18    return avg2;
19}
20
21int main(){
22 
23    float a;
24    a = funAvg(22 , 7);
25    printf("The average of these number is %.3f ",a);
26    cout<<endl;
27    float a1;
28    a1 = funAvg2(11 , 8.6);
29    printf("The average of these number is %.3f ",a1);
30    cout<<endl;
31    // float T;
32    // T = fun(11 , 8.6f);
33    // printf("The average of these number is %.3f ",T);
34    // cout<<endl;
35    // ---------------------function template in c++-----------------
36    float T;
37    T = fun(11 , 98);
38    printf("The average of these number is %.3f ",T);
39
40
41    return 0;
42}

1namespace std {
2  template<typename t> struct hash<MyClass<t>>
3  {
4  	size_t operator() (const MyClass<t>& c) const;
5  }
6}
7
8// You can also do things like
9
10template<template<typename t> class type> func_name<type<t>>();