What is a null pointer assignment error?

[jeyshree]

hai,
will someone please explain me what is null pointer assignment error.different persons say different reasons.some says the following code would generate null pointer assignment error.
#include<stdio. h>
#include<conio. h>
main()
{
int *p=NULL;
*p=10
getch();
}
as we try to access the memory 0 it causes an error.
but in my system i dont get this error.
i am using turbo c++ compiler.(windo w7 os)

[weaknessforcats]

The pointer p contains an address of 0. That is an invalid location for all programs. Depending upon your compiler, you will get a null assignment error at compile time or no error at compile time but an "access: error at run time.

[donbock]

I don't believe the C Standard requires that you be informed of this error. It only guarantees that a program that dereferences a null pointer will not work properly.

[vivek nandan]

you need to assign this pointer with address of some variable like ,
int *i;
int c=10;
i=&c;
//i=10 is an error as i is not a variable but a pointer to some memory!!