passing pointers of array to function

[madmaze]

Hello everyone,
ive been googleing this all day and havent found an answer yet.
i want to create an array in int Main() and then pass a pointer referencing the
array to a function to fill it.
This is how far i have gotten:

int main(void)
{
	test();
	float dat[1000];
	readnprint(&dat[0]);
       /*
         other code her
        */
}

void readnprint(float *base_ptr)
{
    //init ifstream etc etc..
         float addr=base_ptr;
	while (!ins.eof())
	{
		ins>>x;
		float f;
		if(from_string<float>(f, string(x), dec)) //parse float?
		  {
			addr=(base_ptr)+(sizeof(float)*cnt)           //steps through array by sizeof(float)
			*(float)addr=f;  //have this assign the value to memory location (problem)
		  }
		  else
		  {
			cout << "from_string failed" << endl;
		  }
		cnt++;
	}
	ins.close();
}

im sure im just tired and not thinking right, does anyone have a better/working way of doing this?

thanks

-maze