关于void*类型指针的一些测试

#include <iostream>

class ProcessData
{
public:
    ProcessData()
    {
        std::cout << "Construction" << std::endl;
    }
    
    ~ProcessData()
    {
        std::cout << "Destruction" << std::endl;
    }
};

// case1:
// result: Construction Destruction
int main()
{
    ProcessData* pProcessData = new ProcessData;
    
    if(0 != pProcessData)
        delete pProcessData, pProcessData = 0;
    return 0;
}

// case2:
// result: Construction
// 不调用析构函数
int main()
{
    ProcessData* pProcessData = new ProcessData;
    void* pvProcessData = reinterpret_cast<void*>(pProcessData);
    pProcessData = 0;

    if(0 != pvProcessData)
        delete pvProcessData, pvProcessData = 0;
    if(0 != pProcessData)
        delete pProcessData, pPorcessData = 0;
        
    return 0;
}

// case3:
// result: Construction Destruction
// 仍然调用析构函数
int main()
{
    ProcessData* pProcessData = new ProcessData;
    void* pvProcessData = reinterpret_cast<void*>(pProcessData);;
    pProcessData = 0;

    pProcessData = reinterpret_cast<ProcessData*>(pvProcessData);
    pvProcessData = 0;

    if(0 != pProcessData)
        delete pProcessData, pProcessData = 0;
    
    return 0;
}