Explain the concept of user-defined to user-defined data conversion routine located in the destination class.

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Suresh Chand · Accepted Answer

User-defined to user-defined data conversion routines, also known as type conversion operators, allow the programmer to define how an instance of one user-defined data type can be converted to another user-defined data type. This can be useful when working with complex data types that have a similar structure but different names or representations. These conversion routines are located in the destination class, which is the class that the user wants to convert their object to. The routine takes an object of the source class (the class that the user wants to convert from) as an argument and returns an object of the destination class. Here's an example in C++: class Celsius { double temp; public: Celsius(double t = 0.0) { temp = t; } operator Fahrenheit() const; }; class Fahrenheit { double temp; public: Fahrenheit(double t = 0.0) { temp = t; } operator Celsius() const { return Celsius((temp - 32.0) * 5.0 / 9.0); } }; Celsius::operator Fahrenheit() const { return Fahrenheit(temp * 9.0 / 5.0 + 32.0); } In this example, we have two user-defined data types, Celsius and Fahrenheit, which represent temperature values in different scales. The Celsius class has a conversion routine that allows it to be converted to a Fahrenheit object, and the Fahrenheit class has a conversion routine that allows it to be converted to a Celsius object. Now, suppose we have a Celsius object c and we want to convert it to Fahrenheit. We can simply use the conversion operator we defined: Celsius c(100.0); Fahrenheit f = c; In this code, the conversion operator operator Fahrenheit() is called on the c object, which returns a Fahrenheit object. The Fahrenheit object is then assigned to the f variable using the copy constructor. User-defined to user-defined data conversion routines can be a powerful tool for simplifying code and making it more readable. However, they should be used with care, as they can also make code harder to understand if used excessively or inappropriately.

Explain the concept of user-defined to user-defined data conversion routine located in the destination class.

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Explain the concept of user-defined to user-defined data conversion routine located in the destination class.

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