The variable e
is a pointer to an array of n + 1
elements of type double
.
Using the dereference operator on e
gives you the base-type of e
which is ” array of n + 1
elements of type double
“.
The malloc
call simply takes the base-type of e
(explained above) and gets its size, multiplies it by n + 1
, and passing that size to the malloc
function. Essentially allocating an array of n + 1
arrays of n + 1
elements of double
.