高手们,看看下面的问题?

[星之瀚海]

#pragma once
#include <string.h>
#include <iostream.h>
#include <iomanip.h>
class Children
{
char *Name;
int Age;
float Weight;
public:
char *getName(void){ return Name;}
int getAge(void){return Age;}
float getWeight(void){return Weight;}
void prData(void){cout<<Age<<" "<<Name;}
Children(void);
Children(int,float);
Children(char *,int=20,float=45.65);
~Children(void);
Children &operator=(Children &child);
};
Children::Children(void)
{
Name = new char[5];
strcpy(Name,"1234");
Age=0;
Weight=0;
}

Children::Children(int age,float weight)
{
Name = new char[5];
strcpy(Name,"1234");
Age=age;
Weight=weight;
//cout<<*Name;
}

Children::Children(char *name,int age,float weight)
{
Name =new char[strlen(name)+1];
strcpy(Name,name);
Age=age;
Weight=weight;
}
Children::~Children(void)
{
delete Name;
}
Children &Children::operator =(Children &child)
{
Name=new char[strlen(child.getName())+1];
strcpy(Name,child.getName());
Age = child.getAge();
Weight = child.getWeight();
return *this;
}
int main(int argc,char *argv[])
{
Children girl("12345678");
girl.prData();
Children boy=girl;
return 0;
}
上面程序编译正常,运行期最后释放boy.name时报告内存错误,难道是我重载的操作符函数没有写对?解决给分

[joachern]

跟踪结果显示，重载 =成功
错误出在申明了两个对象，同时又在上面操作
释放的时候发生问题

[joachern]

Children &boy=girl;

[hpho]

Chidren boy = girl//这里不是赋值（assign)而是拷贝构做（copy constror)

[hpho]

Chidren(const Chidren& other){
Name = new char[strlen(other.Name)+1];
strcpy(Name, other.Name);
Age = other.Age;
Weight = other.Weight;
}

[北极猩猩]

要同时重载复制构造函数和operator =
在定义operator =事要先释放原来的资源，还要检测是否是自己给自己付值

[晨星]

Children boy=girl;这种形式会调用拷贝构造函数，而你的类中根本没有拷贝构造函数，导致boy没有被安全地构造出来，而析构时删除指针则产生了内存错误。

Children boy;
boy=girl;
这种形式才会调用拷贝运算符，所以在你的程序中，重载的拷贝运算符根本没有派上用场。

[星之瀚海]

steedhorse(晨星):请问如何写拷贝构造函数?

[windnet]

就是啊。我发觉，一般编译没出错，而运行是内存出错死掉的程序大多都是释放的问题。

[liu_feng_fly]

把char *Name;
改成std::string Name;
这样就不用自己写operator = 和 copy ctor了，方便又安全，还不用自己管理内存。

[joachern]

直接在构造含书中加入类的一个参数
child(child aa_child)
{

}
就可哟；

[joachern]

不成！！！

[星之瀚海]

问题已解决,按joachern(程序人生) 的方法,再加一个构造函数即可
Children::Children(Children &child)
{
Name=new char[strlen(child.getName())+1];
strcpy(Name,child.getName());
Age = child.getAge();
Weight = child.getWeight();
}
各位接分