Difference in uses between malloc and calloc

Question

gcc 4.5.1 c89

I have written this source code for my better understanding of malloc and calloc.

I understand, but just have a few questions

Answer 1

As you point out, calloc zeroes out the memory is allocates, while malloc doesn't.

Your examples 1 & 2 each allocate a single contiguous block of five structs (and returns a pointer to that block), whereas example 3 allocates five separate blocks of one struct each (and gives you five pointers unrelated to one another.)