C++类中删除动态二维数组时反复出现‘Aborted (core dumped)’错误

Hey there! First off, don’t let those unkind comments get to you—every programmer starts somewhere, and asking questions is how we all grow. It’s totally normal to hit snags with dynamic memory as a beginner, so great job reaching out for help!

Let’s go through the most likely reasons this crash is happening:

• Mismatched allocation and deallocation: When you use new[] to allocate an array (which you should for rows or the outer array), you must use delete[] to free it—not just delete. For a 2D array, this means you need to loop through each individual row and delete it with delete[], then delete the outer pointer that holds the rows with delete[] too. Mixing these up is a super common mistake that triggers heap corruption.
• Double deletion: If your code ends up trying to delete the same memory twice (like if your destructor runs more than once without proper checks, or you reassign the array pointer without freeing the old memory first), this will cause a core dump.
• Uninitialized or improperly allocated pointers: If your array pointer was never properly allocated (e.g., left as nullptr but you still try to delete it, or you messed up the allocation logic for rows), deleting it can crash your program.
• Heap corruption from out-of-bounds access: If somewhere in your code you wrote data beyond the bounds of your 2D array, you might’ve corrupted the heap’s internal structure. This often doesn’t crash right away—instead, it blows up when you try to free memory later.

To fix this properly, could you share the code for your Array class? Specifically the constructor where you allocate the 2D array, and the destructor (or any method) where you’re trying to delete it? Seeing exactly how you’re handling memory will let us spot the exact issue.

内容的提问来源于stack exchange，提问作者Biggem