In this chapter, we used only a single template class type parameter. C++ allows you to sp...

In this chapter, we used only a single template class type parameter. C++ allows you to specify multiple type parameters. For example, the following code specifies that the class accepts two type parameters:

When creating an instance of the class, we must now specify two data types, such as Example  demo; Modify the Pair class given in Display 16.4 so that the pair of items can be different data types. Write a main function that tests the class with pairs of different data types.