put 0 in char pointer

Why can't we put a 0 character in a char pointer?
It crashes on both lines.

Code:

int main()
{
    char * buf = "hello world";
  
    buf[5] = '\0';
    buf+5  = '\0';

    return 0;
}

It's because buf is pointing to a string constant, and the OS steps in and kills the program when it attempts to modify read-only memory.

Put it in a char array for success.

Ah yeah, of course I knew that and forgot about it.
I just thought when you pass a char array in a function you could modify it but its the same.

Thanks Salem!