Just as we can define function templates, we can also define class templates. The general form of a generic class declaration is shown here:

Syntax

template <class type> class class-name {
.
.
.
}

Example

#include <iostream>
using namespace std;

// template class declaration
template<class T> class MyClass
{
	T x, y;
public:
	MyClass(T a, T b) // constructor to initialize x,y with values
	{
		x = a;
		y = b;
	}
	T sum() // return of type T
	{
		return x + y; // returning sum
	}
};

int main()
{
	MyClass<int> forInteger(10, 3);
	cout << "integer sum: " << forInteger.sum() << "\n";

	MyClass<double> forDouble(10.6, 3.9);
	cout << "integer sum: " << forDouble.sum() << "\n";

	return 0;
}

Output

integer sum: 13
integer sum: 14.5