Pointers & Heap: Double an Array

Pointers & Heap: Double an Array

A pointer exercise that needs manual memory management.

Task

1. Read an integer n, then n integers.
2. malloc a heap array of n ints and store them.
3. In double_all(int *arr, int n), use a pointer to double every element.
4. Print the doubled values in order, space-separated, newline at end.
5. free the heap memory.

Input: first line n; then n integers.
Output: the n doubled integers, space-separated.

Example: input 3 / 1 2 3 → output 2 4 6

Compiled with c-dcc: forgetting free, going out of bounds, or using an unallocated pointer is caught at runtime.