请问什么是this指针？

[samueler]

请各位高手详细解释一下this指针?以及它在平时编程中所起到的作用（最好举例说明）

[z_sky]

你问的这么..., 高手们都不好意思回答。我不是高手，就我来说说。其实认真看书就好了。
this是在对象的成员函数里指向对象自己的指针，比如：
class A {
void funcA();
}
void pub_func(class *a) {..}

class A::funcA() {
pub_func(this);
}

[longwx]

所有讲C++的书都有讲嘛，你要详细到什么地步？

[wjyasd]

就是就是呀！

[zhourongbiao]

this表示自己呀。
如
class e{
int i;
void Fun(int i);//为e类的成员i赋值为参数i的值
}

void Fun(int i)
{
this.i = i;//这样可以区别不同的i
}

[cpunion]

可以传送自己的地址
作用大着呢

你看在VC生成的框架窗口中经常用到

[liu_feng_fly]

在调用函数（不是静态的函数）的时候，要多传一个this指针，因为函数在内存中只有一份，就是用this来区分到底是那个类的实例（可以有多个）调用这个函数

[xiaolizi]

小李子觉得,如果没有this, 应该就不会有c++

[prog_st]

this
C++ Specific —>

The this pointer is a pointer accessible only within the member functions of a class, struct, or union type. It points to the object for which the member function is called. Static member functions do not have a this pointer.

When a nonstatic member function is called for an object, the address of the object is passed as a hidden argument to the function. For example, the following function call

myDate.setMonth( 3 );
can be interpreted this way:

setMonth( &myDate, 3 );
The object's address is available from within the member function as the this pointer. It is legal, though unnecessary, to use the this pointer when referring to members of the class.

The expression (*this) is commonly used to return the current object from a member function.

Note Modifying the this pointer is illegal in the latest version of C++.

END C++ Specific

Example

// Example of the this pointer
void Date::setMonth( int mn )
{
month = mn; // These three statements
this->month = mn; // are equivalent
(*this).month = mn;
}

[chinesealbert]

this 指针就是自己，例如，任何一个方法都是在一个对象中，而如果想调用一个方法，而这个方法又是属于自己（在这里，自己是指一个对象），那么在不方便写出自己（也就是对象）时，就可以用this来代替自己。一般，this使用在定义自己这个对象的内部

[qian]

up

[samueler]

谢谢大家，我已经明白了很多