c - Pointers addresses behaviour -

this question has answer here:

• c pointers: *ptr vs &ptr vs ptr 7 answers

for example:

int *ptr 

what's difference beetween &ptr , ptr because when

printf("ptr= %d  &ptr=%d",ptr,&ptr); 

the result not same.

ptr pointer value (it's address).

&ptr address of pointer object.

to print pointer value have use:

printf("ptr= %p  &ptr=%p", (void *) ptr, (void *) &ptr);