Где ошибка? where is error?

[adam+]

pramram does not work.Where is error?

# include <iostream>

using namespace std;

class A{
      private :
              int x;
      public:
             A():x(0){};
            A operator=(const A& oz);
            
           A operator+(const A& oz) ;
           
            A(int t)
            {
                  x=t;
            }
             };
             
              A A::operator=(const A& oz)
             {
                                  x=oz.x;
             }
             
             A A::operator+(const A& oz) 
             {
                                  x=oz.x;
                                
                             return *this;
                                
             }
             
             int main()
             {
                 A obj1,obj2(2),obj3;
                 obj1=obj2;
                 obj1=obj2+obj3(3);
                 
                 system("pause");
                 return 0;
             }

[Корвин]

# include <iostream>

using namespace std;

class A{
      private :
              int x;
      public:
             A(){this->x=0;}
            A operator=(const A& oz);
            
           A operator+(const A& oz) ;
           
            A(int t)
            {
                  this->x=t;
            }
             };
             
              A& A::operator=(const A& oz)
             {
                                  this->x=oz.x;
                                return *this;

             }
             
             A A::operator+(const A& oz) 
             {
                                  this->x=oz.x;
                                
                             return *this;
                                
             }
             
             int main()
             {
                 A obj1,obj2(2),obj3;
                 obj1=obj2;
                 obj1=obj2+obj3(3);
                 
                 system("pause");
                 return 0;
             }

[Carbon]

Корвин, what are you doing??? operator = must be described like this:

A & A::operator = ( const A & oz )
{
if ( this != &oz )
{
x = oz.x;
}
return * this;
}

And you didn't write right prototype of the method operator = in the class.

[Корвин]

sorry, errors happens!

[adam+]

And you didn't write right prototype of the method operator = in the class.

How can i write prototype?

I wrote program bur didn't work any.
error: prototype for `A& A:perator=(const A&)' does not match any in class `A'
`A& A:perator=(const A&)' and `A A:perator=(const A&)' cannot be overloaded

# include <iostream>

using namespace std;

class A{
private :
int x;
public:
A():x(0){};
A operator=(const A& oz);

A operator+(const A& oz) ;

A(int t)
{
x=t;
}
};

A & A:perator = ( const A & oz )
{
if ( this != &oz )
{
x = oz.x;
}
return * this;
}


A A:perator+(const A& oz)
{
x=oz.x;

return *this;

}

int main()
{
A obj1,obj2(2),obj3;
obj1=obj2;
obj1=obj2+obj3(3);

system("pause");
return 0;
}

[pu4koff]

# include <iostream>

using namespace std;

class A{
private :
int x;
public:
A():x(0){};
A& operator=(const A& oz);

A operator+(const A& oz) ;

A(int t)
{
x=t;
}
};

[adam+]

Pu4koff
I Wrote below code, but program didn't work.

A& operator=(const A& oz);

error:43 no match for call to `(A) (int)'

[pu4koff]

WTF?

obj1=obj2+obj3(3);

[Carbon]

A A:perator+(const A& oz) 
{
x=oz.x;

return *this;

}

Huh! I thought right operator+ must look like this:

A A::operator + ( const A & oz )
{
A res( x + oz.x );
return res;
}

[Carbon]

And please, write copy constructor.