Question

我在C ++中遇到以下问题：

class Class3
{
    //...
};

class Class1
{
public:
void func1(Class3* class3Pointer)
{
    Class3 *myClass3 = new Class3();

    //The newly created object myClass3 should be referenced by class3Pointer
    class3Pointer = myClass3;

    //But I need to work with myClass3 object now in main function below, after myClass3 has been initiated.

    //I want to do that while a loop is sleeping
    while(true) {
        sleep();
    } 
}

};

class Class2
{
    public:
    void func2(Class3* class3Pointer)
    {
        Class1 *Class1Object = new Class1();
    Class1Object->func1(class3Pointer);
}

};




int _tmain(int argc, _TCHAR* argv[])
{
    Class3* class3Pointer;

    Class2 *myClass2 = new Class2();

    myClass2->func2(class3Pointer); //Calling in a new thread

    //Here, I need to work with object myClass3 instantiated in Class1->func1

    return 0;
}

在main方法中，我想用myPointer引用Func2中创建的Object。我怎样才能做到这一点？我认为，上面的方法是错误的，因为它只是按值传递myPointer两次。如何通过引用传递指针？

感谢您的帮助。用例是tcp套接字编程。

最佳，SpeedyV

Answer 1

使函数通过引用获取其参数：

void func1(Class3* & class3Pointer)
// ----------------^

然后对函数中class3Pointer的更改也会改变传递的参数（事实上这两个事物都将表示相同的变量）。

传递对指针的引用

1 个答案: