template class with type parameter

  
#include <iostream>
#include <stdlib.h>
using namespace std;
const int SIZE = 10;

template <class T> class MyClass {
   T a[SIZE];
 public:
   MyClass(void)
    {
      int i;

      for(i=0; i<SIZE; i++)
         a[i] = i;
    }
   T &operator[](int i);
};

template <class T> T &MyClass<T>::operator[](int i)
{
   if(i<0 || i> SIZE-1)
    {
      cout << endl << "Index value of ";
      cout << i << " is out of bounds." << endl;
    }
   return a[i];
}

int main(void)
{
   MyClass<int> int_array;
   MyClass<double> double_array;
   int i;

   cout << "Integer array: ";
   for(i=0; i<SIZE; i++)
      int_array[i] = i;
   for(i=0; i<SIZE; i++)
      cout << int_array[i] << " ";
   cout << endl;

   cout << "Double array: ";
   cout.precision(2);
   for(i=0; i<SIZE; i++)
      double_array[i] = (double)i/3;
   for(i=0; i<SIZE; i++)
      cout << double_array[i] << " ";
   cout << endl;

   int_array[12] = 100;                 // Calls overloaded array operator
}

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template class with type parameter : template class « Class « C++

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