1   // Fig. 3.27: fig03_27.cpp
2   // Using a function template
3   #include <iostream.h>
4   
5   template < class T >
6   T maximum( T value1, T value2, T value3 )
7   {
8      T max = value1;
9   
10     if ( value2 > max )
11        max = value2;
12  
13     if ( value3 > max )
14        max = value3;
15  
16     return max;
17  }
18  
19  int main()
20  {
21     int int1, int2, int3;
22  
23     cout << "Input three integer values: ";
24     cin >> int1 >> int2 >> int3;
25     cout << "The maximum integer value is: "
26          << maximum( int1, int2, int3 );        // int version
27  
28     double double1, double2, double3;
29  
30     cout << "\nInput three double values: ";
31     cin >> double1 >> double2 >> double3;
32     cout << "The maximum double value is: "
33        << maximum( double1, double2, double3 ); // double version
34  
35     char char1, char2, char3;
36  
37     cout << "\nInput three characters: ";
38     cin >> char1 >> char2 >> char3;
39     cout << "The maximum character value is: "
40          << maximum( char1, char2, char3 )      // char version
41          << endl;
42  
43     return 0;
44  }