C++ 使用重载运算符'&燃气轮机&燃气轮机'；不明确（操作数类型为'；istream'；（又称'；基本istream<；char>；'；）和'；MyIncremex'；）

这是代码，我似乎没有发现它有什么问题；我需要重载>运算符，但出现以下错误：

重载运算符“>>”的使用不明确（操作数类型为“istream”（也称为“basic_istream”）和“MyIncremex”）

我看不出它到底有什么模棱两可的地方：

#include<iostream>
using namespace std;


class MyIncreEx;
istream& operator>>(istream& is, MyIncreEx& s);
ostream& operator<<(ostream &os, MyIncreEx& s);
MyIncreEx operator++(MyIncreEx& d, int dummy);
MyIncreEx operator++(MyIncreEx& d);

class MyIncreEx
{
friend istream& operator>>(istream& is, MyIncreEx s);
friend ostream& operator<<(ostream& os, MyIncreEx s);
friend MyIncreEx operator++(MyIncreEx& d, int dummy);   //post-fix ex: x++;
friend MyIncreEx operator++(MyIncreEx& d);  //pre-fix ex: ++x;

public:
MyIncreEx(){num1=0; num2=0; num3=0;};

int num1;
int num2;
int num3;
};

//------------------------------------------------
istream& operator>>(istream& is, MyIncreEx& s)
{
is >> s.num1;
is >> s.num2;
is >> s.num3;
return is;
};

//------------------------------------------------
ostream& operator<<(ostream &os, MyIncreEx& s)
{
os << "(" << s.num1 <<"," <<s.num2 << "," << s.num3 <<")"<< endl;
return os;
};

//------------------------------------------------
MyIncreEx operator++(MyIncreEx& d)              //pre-fix   ex: ++x;
{
d.num1=d.num1+1;
d.num2=d.num2+1;
d.num3=d.num3+1;

return d;
};
//------------------------------------------------

MyIncreEx operator++(MyIncreEx& d, int dummy)   //post-fix ex: x++;
{
d.num1=d.num1+1;
d.num2=d.num2+1;
d.num3=d.num3+1;
return d;
};

//------------------------------------------------
int main()
{
MyIncreEx obj;

cout << "please enter three numbers: ";
cin  >> obj;
cout << "The original value are: ";
cout << obj;
cout << endl;
obj++;
cout << "The new values after obj++ are: ";
cout <<  obj;
cout << endl;
++obj;
cout << "The new values after ++obj are: ";
cout << obj;
cout << endl;

}
//------------------------------------------------

#包括
使用名称空间std；
MyIncremex类；
istream&operator>>（istream&is、MyIncremex&s）；
ostream&operator（istream&is，MyIncremex s）；
friend ostream&operator（istream&is、MyIncremex&s）
{
is>>s.num1；
is>>s.num2；
is>>s.num3；
回报是；
};
//------------------------------------------------
ostream&operator您声明了两种不同版本的输出运算符：

istream& operator>>(istream& is, MyIncreEx& s);
ostream& operator<<(ostream &os, MyIncreEx& s);

class MyIncreEx
{
    friend istream& operator>>(istream& is, MyIncreEx s);
    friend ostream& operator<<(ostream& os, MyIncreEx s);
    ...
};

（假设您还将输出运算符修复为使用
myincremex const&
而不是
myincremex&
）。
您声明了两个不同版本的输出运算符：

istream& operator>>(istream& is, MyIncreEx& s);
ostream& operator<<(ostream &os, MyIncreEx& s);

class MyIncreEx
{
    friend istream& operator>>(istream& is, MyIncreEx s);
    friend ostream& operator<<(ostream& os, MyIncreEx s);
    ...
};

（假设您还修复了输出操作符以使用
myincremex const&
而不是
myincremex&
）。
可能是因为类中的版本上没有
&
？可能是因为类中的版本上没有
&
？