Explain the rules for overloading an operator, C/C++ Programming

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Rules for overloading an operator

This summarizes the most significant points you need to know in order to do operator function overloading.

  • The only operators you may overload are the ones from the C++ list and not all of those are available. You cannot arbitrarily choose a new symbol (such as @) and attempt to "overload it.
  • Start by declaring a function in the normal function fashion, but for the function name use the expression:

                   Operator op

   Where op is the operator to be overloaded. You may leave one or more spaces before op.

  • The pre-defined precedence rules cannot be altered. i.e. you cannot, for instance, make binary '+' have higher precedence than binary '*'. In addition, you cannot alter the associativity of the operators.

 


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