Question

error C2440: 'initializing' : cannot convert from 'class c *' to 'class c' 求指导

#include <iostream>
using namespace std;
class c
{
};
void main()
{
c a=new c();
cout>>&a>>endl;
c b=a;
cout>>&b;
}

-Configuration: 1211 - Win32 Debug--------------------
Compiling...
1211.cpp
C:\Program Files\Microsoft Visual Studio\MyProjects\1211\1211.cpp(8) : error C2440: 'initializing' : cannot convert from 'class c *' to 'class c'
No constructor could take the source type, or constructor overload resolution was ambiguous
C:\Program Files\Microsoft Visual Studio\MyProjects\1211\1211.cpp(9) : error C2676: binary '>>' : 'class std::basic_ostream<char,struct std::char_traits<char> >' does not define this operator or a conversion to a type acceptable to the predefined op
erator
C:\Program Files\Microsoft Visual Studio\MyProjects\1211\1211.cpp(11) : error C2676: binary '>>' : 'class std::basic_ostream<char,struct std::char_traits<char> >' does not define this operator or a conversion to a type acceptable to the predefined o
perator
Error executing cl.exe.
1211.obj - 3 error(s), 0 warning(s)

Answer 1

#include <iostream>
using namespace std;
class c
{
};
void main()
{
c *a=new c();
cout<< &a <<endl;
c *b=a;
cout<< &b;
}

追问

为什么要改为指针呢?

追答

new 返回的就是 指针

追问

为什么a与b的地址是不同的呢？
这不应该是浅复制吗？

追答

cout<< a <<endl;
c *b=a;
cout<< b;

改成 这样才会相同！
指针的 值 才是 地址，他们指向同一地址空间
你再取它们的地址，就是a, b指针变量本身的地址