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#include 
   
    #include 
    
     using namespace std;#define SAFE_DELETE(x) \{ \    if (NULL != (x)) \    { \        delete (x); \        (x) = NULL; \    } \}#define SAFE_DELETE_ARY(x) \{ \    if (NULL != (x)) \    { \        delete[] (x); \        (x) = NULL; \    } \}class CA{public:    CA()    {        setter_m_iTest(-1);    }    ~CA() {}    void setter_m_iTest(int iIn) {m_iTest = iIn;}    int getter_m_iTest() {return m_iTest;}private:    int m_iTest;};void fnTestClass();void clear_cin();int main(int argc, char** argv, char** envp){    fnTestClass();    cout << "END, press any key to quit" << endl;    clear_cin();    getchar();    return 0;}void fnTestClass(){    int i = 0;    int iTmp = 0;    const int iCntAry = 4;    CA* pCaAry = NULL;    CA* pCa = NULL;    /** new 单个对象时的内存布局    +	pCa	0x00883e30    00883E30  01 00 00 00  .... ///< pCa    */    pCa = new CA;    if (NULL != pCa)    {        pCa->setter_m_iTest(1);        SAFE_DELETE(pCa); ///< delete后, 原来的数据变为 EE FE EE FE    }    /** new对象数组时的内存布局    +	pCaAry	0x007d3ddc      007D3DD8  04 00 00 00  .... ; ///< 类数组元素个数 = 4      007D3DDC  00 00 00 00  .... ; ///< 类数组开始, CA[0]      007D3DE0  01 00 00 00  .... ; ///< CA[1]      007D3DE4  02 00 00 00  .... ; ///< CA[2]      007D3DE8  03 00 00 00  .... ; ///< CA[3]    */        pCaAry = new CA[iCntAry];    if (NULL != pCaAry)    {        for (i = 0; i < iCntAry; i++)        {            pCaAry[i].setter_m_iTest(i);        }    }    SAFE_DELETE_ARY(pCaAry);    /** 手工模拟delete删除单个对象    */    pCa = new CA;    if (NULL != pCa)    {        pCa->setter_m_iTest(1);        if (NULL != pCa)        {            pCa->~CA();            free(pCa); ///< ok            pCa = NULL;        }    }    /** 手工模拟delete删除对象数组    会报错, 和实际情况不同    以后再研究 :(    */    // 会报错, 和实际情况不同//     pCaAry = new CA[iCntAry];//     if (NULL != pCaAry)//     {//         iTmp = *((int*)pCaAry - 1);//         for (i = 0; i < iTmp; i++)//         {//             pCaAry[i].setter_m_iTest(i);//             pCaAry[i].~CA();//         }// //         free(pCaAry); ///< ! crash//         pCaAry = NULL;//     }    // 会报错, 和实际情况不同//     pCaAry = new CA[iCntAry];//     if (NULL != pCaAry)//     {//         iTmp = *((int*)pCaAry - 1);//         for (i = 0; i < iTmp; i++)//         {//             pCaAry[i].setter_m_iTest(i);//             pCaAry[i].~CA();//             free(pCaAry + i); ///< ! crash//         }// //         pCaAry = NULL;//     }}void clear_cin(){    cin.clear();    cin.sync();}
    
   

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