1        template<class C> void square(C num, C *result)
 2        {
 3             *result = num * num;
 4        }
 5    
 6        template<class T> class Array
 7        {
 8        public:
 9              int getlength(void)
10             {
11                    return length;
12              }
13    
14              T & operator[](int i)
15              {
16                    return array[i];
17             }
18    
19              Array(int l)
20              {
21                    length = l;
22                    array = new T[length];
23              }
24    
25              ~Array(void)
26              {
27                    delete [] array;
28              }
29    
30        private:
31              int length;
32              T *array;
33        };
34    
35        int main(void)
36        {
37              int i, j = 3;
38             square(j, &i);
39    
40             double d, e = 4.1;
41              square(e, &d);
42    
43              Array<int> iarray(5);
44              for (i = 0; i < iarray.getlength(); ++i)
45              {
46                   iarray[i] = i;
47             }
48    
49              Array<double> darray(5);
50              for (i = 0; i < darray.getlength(); ++i)
51             {
52                    darray[i] = i * 2.1;
53              }
54    
55              return 0;
56        }