C++中将对象this转换成unsigned char指针

示例程序

//  ---CodeBlob.h---
#ifndef CODEBLOB_H_
#define CODEBLOB_H_


class CodeBlob {
private:
  const char* _name;
  int        _size;

public:
	CodeBlob();
	void printName();
	void printSize();
	void setSize(int size);
	virtual ~CodeBlob();
};

#endif /* CODEBLOB_H_ */

//  ---CodeBlob.cpp---
#include <iostream>
#include "CodeBlob.h"

typedef unsigned char u_char;
typedef u_char*       address;

CodeBlob::CodeBlob() {
	_size = 5;
	_name = "hello";

}

CodeBlob::~CodeBlob() {
}

void CodeBlob::printName(){
  std::cout << _name << std::endl;
}

void CodeBlob::printSize(){
  std::cout << _size << std::endl;
  address aa = (address)this; // 这样写是没语法错误的
  std::cout << aa << std::endl;
}

void CodeBlob::setSize(int size){
	_size = size;
}


//  ---PointerConvert.cpp---

#include <iostream>
#include "CodeBlob.h"


int main(int argc, char **argv) {
	std::cout << "hello simon"<<std::endl;
	CodeBlob cb1;
	CodeBlob cb2;
	CodeBlob* cb3 = new CodeBlob();
	cb1.printName();
	cb1.setSize(100);
	cb1.printSize();
	cb2.printSize();
	cb3->setSize(20);
	cb3->printSize();
//	address a = (address)cb3;
//	std::cout << a <<std::endl;
	return 0;
}

此处是可以将对象this转换成unsigned char指针的。adress的值就是对象this的地址。