关于c++深浅拷贝问题解析

include

using namespace std;
class Maker
{
public:
Maker(const char *tmp, int age)
{
p =(char*) malloc(strlen(tmp) + 1);
strcpy(p, tmp);
this->age = age;
}
Maker(const Maker &maker)
{
cout << “调用自己写的拷贝构造函数” << endl;
//1.申请空间
p = (char*)malloc(strlen(maker.p) + 1);
strcpy(p, maker.p);
age = maker.age;
}
~Maker()
{
cout << “析构函数” << endl;

    if (p != NULL)
    {
        free(p);

    }

}

public:
char *p;
int age;
};
void test01()
{
Maker m1(“小哥哥”, 20);
Maker m2(m1);//调用默认的拷贝构造函数

cout << "m1.Name:" << m1.p << " m1.Age:" << m1.age << endl;
cout << "m2.Name:" << m2.p << " m2.Age:" << m2.age << endl;

}

int main()

{
test01();
system(“pause”);
return EXIT_SUCCESS;
}

解决方法:深拷贝：自己写的拷贝构造函数，申请一块空间，把旧空间的数据拷贝到新空间