Summing values in allocated memory

What this C++ memory-management code-tracing question tests

This is a medium-difficulty C++ question that asks you to trace through a program involving dynamic memory allocation and pointer arithmetic. It rewards careful attention to how new, pointer dereferencing, and array indexing interact in C++.

To solve problems like this, you need to mentally execute the code step by step: understand what memory is allocated, track how pointers are manipulated, and predict what values are read or written at each stage. The question probes both your fluency with low-level memory semantics and your ability to avoid common mistakes like off-by-one errors or undefined behaviour.

• Dynamic allocation with new and delete
• Pointer arithmetic and array indexing
• Scope and lifetime of allocated objects
• Undefined vs. well-defined behaviour