How far does the pointer move?
It would make little sense to be able to ''point anywhere'' into memory,
and so C automatically 'adjusts' pointers' movement (forwards and backwards)
by values that are multiples of the size of the base types
to which the pointer points(!).
In our example:
for(int i=0 ; i<N ; ++i) {
*p = 0; // set what p points to to zero
++p; // advance/move pointer p "right" to point to the next integer
}
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p will initially point to the location of the variable:
- totals[0], then to
- totals[1], then to
- totals[2] ...
Similarly, we can say that p has the values:
- &totals[0], then
- &totals[1], then
- &totals[2] ...
CITS2002 Systems Programming, Lecture 11, p8, 26th August 2024.
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CITS2002