casting - typecasting in C -

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in code error :

expected ‘const void *’ argument of type ‘struct in_addr’

i using memcmp can type cast struct in_addr const void* const void * (struct in_addr )

you need cast address of object, not object itself:

(const void *)&my_obj

but in fact, such casts implict, can use:

&my_obj

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