C Programming - Complicated Declarations - Discussion

Pointer in 16-bit compiler is 2 byte.
32-bit compiler have 4 byte.
64-bit compiler have 8 byte.

Thanks @Anurag.

Near pointer-- this pointer created in one segment and holding any offset address of the same segment or the pointer that works under 64KB is called the near pointer.

Far pointer--the pointer created in one segment and holding the offset address of the other segment or the pointer that works beyond 64KN memory is called far pointer.

Huge pointer--it is the same as the far pointer but it always normalises the address before reading or writing data into memory.

Please explain this.

What is the diff used to find whether a question is 32/64bit?

char huge *near *far *ptr1;

char near *far *huge *ptr2;
char far *huge *near *ptr3;
printf("%d, %d, %d\n", sizeof(ptr1), sizeof(*ptr2), sizeof(**ptr3));

:when ptr1 is called it will type cast near to far then huge and return 4.
:when *ptr2 is called same type cast near to far then huge and return 4.
:when **ptr3 is called it will type cast again far too huge then to near but this time ptr to ptr is called n it is pointing to far type so return 4 again.

Please to solve the program. I need answer.

On 32-bit machine sizeof pointer is 32 bits (4 bytes), while on 64 bit machine it's 8 byte. Regardless of what data type they are pointing to, they have fixed size.

Pointer size in 64 bit is 4 bits.

Pointer is used to store the address of int, char, float so no matter what the data type is. It stores the address value which is an integer value so it requires 2 byte in 16 bit compiler and 4 byte in 32 bit compiler.