Are pointers and arrays any different in C?

Question

I'm writing a small C program to do some number crunching, and it needs to pass around arrays between functions. The functions should accept and return pointers, right?

For example, this (I know it may not be the most efficient thing):

int* reverse(int* l, int len) {
    int* reversed = malloc(sizeof(*reversed)*len);
    int i, j;
    for (i = 0, j = len-1; i < len; i++, j--) {
        reversed[j] = l[i];
    }
    return reversed;
}

Am I using pointers right?

Answer 1

Your code snippet is correct. However, pointers and arrays in C are indeed different. Put simply "the pointer to type T" is not same as "the array of type T".

Please have a look at C Faq discussing Pointers & arrays to get a better understanding of this.