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Implicit
conversions occur when mixed type expressions
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are
evaluated or when the actual arguments in a function
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call
do not match the formal arguments of the function
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prototype.
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First,
the compiler tries to apply a trivial conversion.
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If
there is no match, then the compiler attempts to apply a
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promotion.
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If
there is no match, then the compiler attempts to apply a
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built-in
type conversion.
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If
there is no match, then the compiler attempts to apply a
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user
defined type conversion.
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If
there is no match, the compiler generates an error.
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