C++ delete []對象導致崩潰

我做了一個動態的對象數組。當我調用delete []時，程序崩潰並停止響應。但它確實奇怪：調用所有析構函數和崩潰。看看這個代碼並輸出。所有數組的所有內存都被分配。C++ delete []對象導致崩潰

//main file 
#include "myobject.h" 

int size; 
myObject *foo; 

//some operations to estimate size 

foo = new myObject[size]; 

//some operations with myObject 

std::cout<<"size: "<<size<<"\n"; 
std::cout<<"Deleting object\n"; 

size=0; 
delete [] foo;

下一個文件：

//myobject.h 

class myObject 
{ 
    public: 
    int number; 

    Object1 ob1[64] 
    Object2 *ob2; 

    myObject(){ }; 
    ~myObject() 
    { 
     std::cout<<"delete "<<number<<"\n"; 

     delete [] ob1; 
     delete [] ob2; 
    }; 
}

和輸出：

size: 11 

Deleting object 

delete 10 

delete 9 

delete 8 

delete 7 

delete 6 

delete 5 

delete 4 

delete 3 

delete 2 

delete 1 

delete 0

然後它崩潰並停止響應。

來源

2015-02-11 hakeris1010

如何分配'ob2'？ – 2015-02-11 16:36:52

爲什麼要刪除析構函數中的ob1？ – LeeNeverGup 2015-02-11 16:37:06

您只能致電delete[]由new[]返回的指針，並且您必須完成一次。這同樣適用於delete和new。

特別是，您不能delete[] obj1，因爲它是一個內置數組，而不是指針，並且只有指向分配了new[]的未釋放內存，才能使用obj2。

來源

2015-02-11 16:37:58

delete [] ob1;

你沒有new obj1;它是包含在對象中的數組。刪除沒有用new分配的東西會導致未定義的行爲，這很可能是崩潰。

如果你打算像這樣玩弄指針，那麼你需要了解Rule of Three以避免下一次遇到的死亡陷阱。然後瞭解RAII and smart pointers，忘記這個危險的廢話。

來源

2015-02-11 16:39:43

C++ delete []對象導致崩潰

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