Write a simple function template for predicate function isEqualTo that compares its two arguments of the same type with the equality operator (==) and returns true if they are equal and false otherwise. Use this function template in a program that calls isEqualTo only with a variety of built-in types. Now write a separate version of the program that calls isEqualTo with a user-defined class type,
but does not overload the equality operator. What happens when you attempt to run this program? Now overload the equality operator (with the operator function) operator==. Now what happens when you attempt to run this program?
What will be an ideal response?
If the user-defined class does not overload the equality operator (i.e., comment out
lines 30–33 in the solution below), the compiler would report an error indicating that the class does not define this operator or a conversion to a type acceptable to the pre-defined operator. Once the class overloads the equality operator, the program should run fine.
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