помогите исправить ошибку

[dimons009]

#include<stdio.h>
#include<iostream>
#include<conio.h>
#include<math.h>

int main()
{
	float  a, b, c, x, f, initialX, finalX, dX;
	printf("Enter a:");
	scanf_s("%f", &a);
	printf("Enter b:");
	scanf_s("%f", &b);
	printf("Enter x:");
	scanf_s("%f", &x);
	printf("Enter initial x:");
	scanf_s("%f", &initialX);
	printf("Enter final x:");
	scanf_s("%f", &finalX);
	printf("Enter dx:");
	scanf_s("%f", &dX);
	printf("\t x | f \n");
	for (x = &initialX; x <= finalX; x += dX)
	{
		if ((x<5) && (c != 0))
		{
			f = (-a*x*x - b);
		}
		else
			if ((x>5) && (c == 0))
			{
				f = ((x - a) / x);
			}
			else
				f = (x / c);

		if ((((int)a)&((int)b)) ^ (((int)a)&((int)c)))
			printf("\t%7.2f | %7d\n", x, (int)f);
		else

		printf ("\t%7.2f | %7.3f\n", x, f);
	}
	getch();
}

[p51x]

x = &initialX

Зачем адрес?