c - Is the NULL pointer implicitly converted to type (int*) when we use "if(ptr==NULL)" for an integer pointer ptr? -


i know null pointer (void*)0.but happens when use statements following:

  if(ptr==null)

where ptr can char,float or int pointer?is null guaranteed implicitly converted type on left as, example, in c, type returned malloc() void* implicitly converted type of lvalue?

is null guaranteed implicitly converted type on left? [...]

yes.

according section 6.3.2.3.4 of iso/iec 9899:2011 c programming language standard:

conversion of null pointer pointer type yields null pointer of type. 2 null pointers shall compare equal.

and section 6.3.2.3.1

a pointer void may converted or pointer object type. a pointer object type may converted pointer void , again; result shall compare equal original pointer.


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