我是刚刚近来的，看一看你们的智慧吧

[gangzichh]

#include<iostream.h>
class Box
{
public:
Box(int=10,int=10,int=10);
int volume();
private:
int height;
int width;
int length;
};
Box::Box(int h,int w,int len)
{
height=h;
width=w;
length=len;
}
int Box::volume()
{
return(height*width*length);
}

int main()
{
Box box1(15,30,25),Box2;
cout<<"The volume of box is"<<box1.volume<<endl;
box2=box1;
cout<<"The volume of box is"<<box2.volume<<endl;
return 0;
}
这是原代码呀！但是我不知道什么地方错呀！希望你们能解决一下吧

[Mr_Yang]

Box２（）；
box2=box1;　这个好象不能直接等的吧，要重载＂＝＂；

[sasdaa]

没错,缺少重载函数

[lance_123]

得写一个=的重载函数了.

[youruhe]

你太粗心了！
别的不看
Box box1(15,30,25),Box2;
cout<<"The volume of box is"<<box1.volume<<endl;
box2=box1;
cout<<"The volume of box is"<<box2.volume<<endl;
return 0;
前面定义Box2，后面怎么又是box2? && volume方法也不加()

[dalish200]

#include<iostream.h>
class Box
{
public:
Box(int=10,int=10,int=10);
int volume();
private:
int height;
int width;
int length;
};
Box::Box(int h,int w,int len)
{
height=h;
width=w;
length=len;
}
int Box::volume()
{
return(height*width*length);
}

int main()
{
Box box1(15,30,25),Box2;
cout<<"The volume of box is"<<box1.volume()<<endl;
Box box2(box1);
cout<<"The volume of box is"<<box2.volume()<<endl;
return 0;
}

[dalish200]

1. box1.volume()&&box2.volume()没加()
2. 初始化对象时box2=box1前面要加上类名

[gangzichh]

什么呀！这个好象是不行的呀！就没有一个狠的人吗？

[conglingkaishi]

呵呵?考智慧?

[glede0924]

#include<iostream.h>
class Box
{
public:
Box(int, int,int);
Box();
Box(Box &b);
int volume();
private:
int height;
int width;
int length;
};

Box::Box(int h,int w,int len)
{
height=h;
width=w;
length=len;
}

Box::Box()
{
height = 1;
length = 1;
width = 1;
}

Box::Box(Box &b)
{
b.height = height;
b.length = length;
b.width = width;
}
int Box::volume()
{
return (height*width*length);
}

int main()
{
Box box1(2,3,4), box2;
cout<<"The volume of box is "<<box1.volume()<<endl;
box2 = box1;
cout<<"The volume of box is "<<box2.volume()<<endl;
return 0;
}

[superioi]

缺少默认的构造函数吧

[glede0924]

#include<iostream.h>
class Box
{
public:
Box(int=10,int=10,int=10);
int volume();
private:
int height;
int width;
int length;
};
Box::Box(int h,int w,int len)
{
height=h;
width=w;
length=len;
}
int Box::volume()
{
return(height*width*length);
}

int main()
{
Box box1(15,30,25),box2;
cout<<"The volume of box is"<<box1.volume()<<endl;
box2=box1;
cout<<"The volume of box is"<<box2.volume()<<endl;
return 0;
}

[dalish200]

Box box1(15,30,25),Box2;//这里定义Box2
cout<<"The volume of box is"<<box1.volume<<endl;//这里的volume没有加()
box2=box1;//这里用的box2
//楼主是粗心大王

[huangyi101]

#include<iostream.h>
class Box
{
public:
Box(int=10,int=10,int=10);
int volume();
private:
int height;
int width;
int length;
};
Box::Box(int h,int w,int len)
{
height=h;
width=w;
length=len;
}
int Box::volume()
{
return(height*width*length);
}

int main()
{
Box box1(15,30,25),box2;
cout<<"The volume of box is"<<box1.volume()<<endl;
//box2=box1;
cout<<"The volume of box is"<<box2.volume()<<endl;
return 0;
}

[youzelin]

这是谭浩强书上的吧，好像见过

[EnginePlus]

???搞什么啊 大小写有区分的啊

[yulin001122]

默认的构造函数哪里去了？？ Box box1(15,30,25),box2;
这句错了。。 box2调用默认的构造函数但因为你自己写了构造函数，所以默认的构造函数没有了。 自己再加一个没有参数的构造函数吧 或者
Box box1(15,30,25)；
Box box2=box1;

[罗嘉贇]

#include<iostream>
using namespace std;

class Box
{
public:
Box(int=10,int=10,int=10);
int volume();
private:
int height;
int width;
int length;
};

Box::Box(int h,int w,int len)
{
height=h;
width=w;
length=len;
}

int Box::volume()
{
return(height*width*length);
}

int main()
{
Box box1(15,30,25);
cout<<"The volume of box is"<<box1.volume()<<endl;
Box box2=box1;//如果要直接用 box2=box1;最好先重载=
cout<<"The volume of box is"<<box2.volume()<<endl;
return 0;
}