相关疑难解决方法(0)

一个相当理论的问题......为什么常量引用的行为与常量指针的行为不同,我实际上可以更改它们指向的对象？它们看起来像是另一个简单的变量声明.我为什么要用它们？这是我运行的一个简短示例,它编译并运行时没有错误:

int main (){
    int i=0;
    int y=1;    
    int&const icr=i;
    icr=y;          // Can change the object it is pointing to so it's not like a const pointer...
    icr=99;         // Can assign another value but the value is not assigned to y...
    int x=9;
    icr=x;
    cout<<"icr: "<<icr<<", y:"<<y<<endl; 
}

在C++工作了15年后,我发现我完全不理解参考文献......

class TestClass
{
public:
    TestClass() : m_nData(0)
    {
    }

    TestClass(int n) : m_nData(n)
    {
    }

    ~TestClass()
    {
        cout << "destructor" << endl;
    }

    void Dump()
    {
        cout << "data = " << m_nData << "  ptr = 0x" << hex << this << dec << endl;
    }

private:
    int m_nData;
};

int main()
{
    cout << "main started" << endl;

    TestClass& c = TestClass();
    c.Dump();

    c = TestClass(10);
    c.Dump();

    cout << "main ended" << endl;

    return 0;
}

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