Discussion
Which part of the program address space is p stored in the code given below?
int *p;
int main()
{
int i = 0;
p = &i;
return 0;
}
Answer: C
Correct answer: Bss segment
p is at file scope with no initialiser, so it belongs in BSS - the block reserved for zero-initialised statics. BSS occupies no space in the executable file: only its size is recorded, and the loader zeroes it, which is why an uninitialised global costs nothing on disk.
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