#include <stdio.h>
void printStar(){
	int i;
	for (i = 0; i < 50; i++)
		putchar('*');
	printf("\n\n");
}

int main(){

	float x, y, z, z1, y1;

	x = 0.01;
	printf("\n\n");
	printStar();
	if (x * 100.0 != 1.0)
		printf("0.01 * 100.0 is %10.10f !!\n\n", x * 100.0);
	else
		printf("Some systems do the right thing.\n\n");

	// Another surprising result
	x = 77777.0;
	y = 7.0;
	y1 = 1 / y;
	z = x / y;
	z1 = x * y1;
	printStar();
	printf("z = 77777.0 / 7.0 \n");
	printf("y1 = 1 / 7.0 \n");
	printf("z1 = 77777.0 / y1 \n\n");

	printf("z is %10.10f and z1 is %10.10f\n\n", z, z1);
	if (z != z1)
		printf("Hey, they're not equal! 1/7.0 cannot be represented in binary. \n\n");
	else
		printf("Of course they're euqal!\n\n");

	// A problem with significant digits
	x = 1000.2;
	y = x - 1000.0;
	printStar();
	printf("1000.2 - 1000.0 = %10.10f\n\n", y);
	printStar();
	return(0);
}