What are the rules for implicit type conversion in C++?

The implicit type conversion rules in C++ are as follows:

  1. Implicit type conversions can be performed between standard built-in types, such as conversions between integers and conversions between floating point numbers.
  2. Derived class objects can be implicitly converted to base class objects.
  3. Arrays can be implicitly converted to pointers, pointing to the first element of the array.
  4. Pointer types can be implicitly converted to void pointer types.
  5. Objects that are const can be implicitly converted to objects that are not const, but not the other way around.
  6. Enumerated types can be implicitly converted to integers.
  7. When there are multiple user-defined type conversion functions available, the compiler selects the conversion function based on the fewest number of conversions required.
  8. If there is any ambiguity in implicit type conversion, the compiler will throw an error.

It is important to be cautious when conducting type conversions, especially when dealing with conversions between different types, as it may result in data loss or unexpected outcomes. Therefore, it is advisable to use explicit type conversion when performing type conversions to enhance the readability and maintainability of the code.

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