Objective

Implement a function that converts an integer to its decimal string representation, allocating the result on the heap.

Steps

• The function takes a single int parameter and returns a heap-allocated, null-terminated string.
• Use malloc to allocate the result; the caller is responsible for freeing it.
• Handle positive numbers, negative numbers, and zero correctly.
• The returned string must contain only the sign (if negative) and decimal digits, no extra characters.

Objective

Implement a function that converts an integer to its decimal string representation, allocating the result on the heap.

Steps

• The function takes a single int parameter and returns a heap-allocated, null-terminated string.
• Use malloc to allocate the result; the caller is responsible for freeing it.
• Handle positive numbers, negative numbers, and zero correctly.
• The returned string must contain only the sign (if negative) and decimal digits, no extra characters.