regarding class and objects

[apar ad]

Can somebody help me out here. I want to add complex expressions as many as per the request of user. I am trying to send array of objects through function arguement.

  class complex
{
      float x;
      float y;
      public:
             void Input (float a,float b)
             {    x = a;       y = b;  }
             complex Sum (complex,int);
             void Display (complex);
};

complex complex :: Sum (complex ci[], int q)         // q is the no. of exp.s to be added      
{       
        float x;
        float y;
        complex co;
        co.x = co.y = 0;
        for (int i=1;i<=q;i++)
        {
            co.x = co.x + ci.x[i];
            co.y = co.y + ci.y[i];
        }
        return (co);
}

It generates error :prototype for `complex complex::Sum(complex*, int)' does not match any in class `complex'
:`x' is not a type. request for member of non-aggregate type before '[' token
(same for y)

[jlb]

You defined the Sum function parameters as a single complex instance and an int, but you're trying to implement the function using an array of complex and an in int. The function signatures must match.

[apar ad]

Thanks for that one.
I changed the function declaration to complex "Sum(complex c[], int);"
But again the error:"`x' is not a type. request for member of non-aggregate type before '[' token".
still persists.

[wildblue]

co.x = co.x + ci.x[i];

Looks like ci is the array of complex objects and x (and y in the next line) are data members of type float? If you're trying to iterate through the different elements of the complex array and pull each x value, then the [i] would be next to ci, not x.

co.x = co.x + ci[i].x;

[apar ad]

Thanks man. Got it right.