Thread: Problem with CPP Classes, probably easy fix

This is my class...

Code:

class ivar
{
public:
	float real, immaginary;
	ivar(){};					// Constructor
//	~ivar(){};
	ivar(float, float);
	ivar operator + (ivar);
	ivar operator - (ivar);
	ivar operator * (ivar);
	ivar iscreen(float maxx, float minx, float maxi, float mini, int screenx, int screeny, int x, int y);
	ivar iantiscreen(float maxx, float minx, float maxy, float miny, int screenx, int screeny, int sx, int sy);
}z, c;

and this is the iscreen function:

Code:

ivar ivar::iscreen(float maxx, float minx, float maxi, float mini, int screenx, int screeny, int x, int y)
{
	ivar answer;
	answer.real=((maxx-minx)/screenx)*x+minx;
	answer.immaginary=((maxi-mini)/screeny)*y+mini;
	return(answer);
}

and when I try to use this function later on in the program with this:

Code:

c=ivar.iscreen(maxX, minX, maxY, minY, ScreenX, ScreenY, x, y);

the compiler gives me the error:

expected primary-expression before '.' token

------------------------------
I don't know what I'm doing wrong, this is the first time I've used classes, and following the tutorials precisely leads me to this implementation, however it doesn't seem to work!

Any Class enlightenment would be of great service. Thanks!

You have no idea what you've done...

You saved me:

*12 cans of minute maid lemonade,
*the time it takes to run back and forth to the bathroom 7 times
*a major headache
*a growing complex uninterest in class jargon
*a very angry me

I really appreciate your help! Rock ON WITH YOU!

Also very quick response thank you for that too

I chose to go with the way that classes are meant to be used, c.iscreen(...);

Its so much easier and I get the concept of classes just a bit more. Thanks : )