“this"指针是什么?

2021-12-09 00:00:00 class pointers this c++

我对 C++ 相当陌生，我不明白 this 指针在以下场景中的作用:

I'm fairly new to C++, and I don't understand what the this pointer does in the following scenario:

void do_something_to_a_foo(Foo *foo_instance);


void Foo::DoSomething()
{
  do_something_to_a_foo(this);
}

我从这里其他人的帖子中获取的.

I grabbed that from someone else's post on here.

this 指向什么?我糊涂了.函数没有输入，那么this在做什么?

What does this point to? I'm confused. The function has no input, so what is this doing?

推荐答案

this 引用当前对象.

关键字this 标识了一种特殊类型的指针.假设你创建了一个class A的名为x的对象，并且class A有一个非静态成员函数f().如果调用函数xf()，f()主体中的关键字this存储的是x的地址代码>.

The keyword this identifies a special type of pointer. Suppose that you create an object named x of class A, and class A has a non-static member function f(). If you call the function x.f(), the keyword this in the body of f() stores the address of x.

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