Which roles are used when i call a function with pointer argument unless declare the function before? I know that float are promoted to double and that are executed the integral promotion, but what happens at the pointers?
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Nothing. Default argument promotions don't apply to arguments of pointer type so they are left unchanged in type and value.
CB Bailey
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Simply because C99 "6.5.2.2 Function calls" 6 does not say anything about pointers when defining default argument promotions is that it (only integers and `float`? – Ciro Santilli OurBigBook.com May 23 '16 at 13:37