刪除指針會導致內存泄漏？

Question

我正在使用CRT運行時庫來檢測內存泄漏。 這是我在析構函數中找到的內容：

                    _CrtMemCheckpoint(&crtMemStateFinish);
nDifference = _CrtMemDifference(&crtMemStateDifference, &crtMemStateStart, &crtMemStateFinish);
sizeChange = crtMemStateFinish.lSizes - crtMemStateStart.lSizes;
if(nDifference > 0)
_CrtDumpMemoryLeaks();
nDifference = 0;
sizeChange = 0;
_CrtMemCheckpoint(&crtMemStateStart);


                delete[] ptr;
                ptr = NULL;

                    _CrtMemCheckpoint(&crtMemStateFinish);
nDifference = _CrtMemDifference(&crtMemStateDifference, &crtMemStateStart, &crtMemStateFinish);
sizeChange = crtMemStateFinish.lSizes - crtMemStateStart.lSizes;
if(nDifference > 0)
_CrtDumpMemoryLeaks();
nDifference = 0;
sizeChange = 0;
_CrtMemCheckpoint(&crtMemStateStart);

nDifference> 0，因此存在內存泄漏，但沒有說明在哪里。

這是ptr的聲明和定義方式：

char ** ptr;

ptr = new char*[4];

有什么建議么？

Answer 1

您正在分配一個指針數組。 您不僅需要刪除數組，還必須刪除數組中的每個指針。 顯然，您需要在刪除陣列之前執行此操作。