Question

This one appears in my exam, i was partly wrong and I don't know why. Please check. C++ language.

Consider the following declarations:
const int SIZE = 12;
int list[SIZE];
int *listPtr = list;
int j = 0;
int sum = 0;

Which of the following correctly finds the sum of all the elements of list?
i) for (j = SIZE - 1; j >= 0; --j)
sum += list[j];
ii) sum = listPtr[0];
for (j = 1; j < SIZE; j ++)
sum += listPtr[j];
iii) for (listPtr = list; listPtr != list + Size; sum += *(listPtr++));

I chose i and ii, which is partly wrong (got 3/5 points). thank you in advance.

Answer 1

Assuming that `Size` in the third option should be `SIZE`, all three methods seem correct to me (also tested it with a small C program and all three methods give the same result).

Answer 2

thank you, sry couldn't reply to you sooner. my openstudy just doesn't load lately.