C++ 进阶5 拷贝构造 深度复制 运算符重载 20131026
例子： 运行环境是G++ 编译，
/*
* main.cpp
*
* Created on: 2013年10月26日
* Author: yangtfei
*/
#include <iostream>
#include <cstring>
#include <stdlib.h>
#include <stdio.h>
using namespace std;
class Base{
private:
int val;
char * str;
public:
Base(const char * str, const int v){
this->val = v;
int len = strlen(str);
this->str = new char[len+1];
strcpy(this->str,str);
}
Base(const Base & b){
this->val = b.val;
int len = strlen(b.str);
this->str = new char[len+1];
strcpy(str, b.str);
}
Base& operator=(const Base& b){
this->val = b.val;
int len = strlen(b.str);
this->str = new char[len+1];
strcpy(str,b.str);
return *this;
}
~Base(){
delete this->str;
cout << "Base::~Base()" << endl;
}
void printInfo(){
cout << "val:" << this->val << ", name:" << this->str << endl;
}
void setName(const char * name){
if(this->str!= NULL){
delete str;
str = NULL;
}
int len = strlen(name);
str = new char[len+1];
strcpy(str,name);
}
};
void getMemory(char ** p , int num){
*p =(char*) malloc(num);
}
int main(){
Base b("yang",10);
Base c = b;
Base d (b);
b.printInfo();
c.printInfo();
d.printInfo();
b.setName("teng");
c.setName("fei");
b.printInfo();
c.printInfo();
d.printInfo();
return 0;
}