Why pointer variable without initialization prints 0,but not garbage?

Question

we know that c language stores garbage value in a variable if it is not initialized, but in case of pointers,without assigning an address to pointer,printing pointer results 0

int x;
print("%d",x);

output:: some garbage value

int *y:
print("%d",*y);

output:: 0

Answer 1

which compiler you use??

Answer 2

Take an uninitialized pointer:

int* ptr;//points to any location in memory
but in turbo c++ shows 0

Take a null pointer:

int* ptr = NULL;//normally points to 0x0 (0)
Both would cause undefined behaviour if dereferenced. NULL is often defined as 0.

Answer 3

i think it depends on compiler.. in turbo c++ shows zero both uninitialized and null pointer..
as http://rextester.com/l/c_online_compiler_gcc -gcc compiler also show 0

Answer 4

a uninitialized pointer can point to garbage data, just yesterday i fixed a bug caused by a uninitialized pointer that was pointing to garbage. by the way: you shouldn‘t use turbo c++ it doesn‘t support c++11,c++14 and c++17 and has some nonstandart behavior

Answer 5

you are saying an uninitialed pointer contains NULL value but because of turboc++ ,NULL value is showed as 0 !!!!

Answer 6

it generated error ,
invalid memory reference...

Answer 7

Depends how your compiler functions. Your first example also shows 0 on my system.

https://en.m.wikipedia.org/wiki/Undefined_behavior

Answer 8

thanks to all:-)