Why the pointer char size is 8 in here ? And why all size is equal ?

Question

https://code.sololearn.com/cxdoJ0xo5F8s/?ref=app

Answer 1

sizeof of pointers differ between systems. 4 for 32-bit. 8 for 64-bit.

Answer 2

A pointer contains a memory address, so its size is the same regardless of what it points to. As Jomari Pantorilla said, the size of an address is system-dependant, and is 8 bytes on 64-bit systems (8*8 = 64).

Answer 3

its for the memory of bits which it consumes and pointer char size is 8.