Template C++

Simple example of Template in C++.

1:  #include <iostream>  
2:  using namespace std;  
3:  template <class dT>  
4:  void swapIt(dT &u, dT &v);  
5:    
6:  int main(){  
7:       int i1 = 2, i2 = 4;  
8:       double d1 = 2.2, d2 = 5.6;  
9:       float f1 = 1.1, f2 = 5.2;  
10:       char c1 = 'c', c2 = 'R';  
11:       cout << "i1 = " << i1 << "\ti2 = " << i2 << endl;  
12:       cout << "d1 = " << d1 << "\td2 = " << d2 << endl;  
13:       cout << "f1 = " << f1 << "\tf2 = " << f2 << endl;  
14:       cout << "c1 = " << c1 << "\tc2 = " << c2 << endl;  
15:         
16:       swapIt(i1,i2);  
17:       swapIt(f1,f2);  
18:       swapIt(d1,d2);  
19:       swapIt(c1,c2);  
20:    
21:       cout << "\nAfter swaping: " << endl;  
22:       cout << "i1 = " << i1 << "\ti2 = " << i2 << endl;  
23:       cout << "d1 = " << d1 << "\td2 = " << d2 << endl;  
24:       cout << "f1 = " << f1 << "\tf2 = " << f2 << endl;  
25:       cout << "c1 = " << c1 << "\tc2 = " << c2 << endl;  
26:       return 0;  
27:  }  
28:  template <class dT>  
29:  void swapIt(dT &u, dT &v){  
30:       dT t = u;  
31:       u = v;  
32:       v = t;  
33:  }