If statement, float comparison ERROR

[Fl4v10]

Hi,

I am using an if statement to compare 2 floats. You can see the code below.
I have the VE class, where x is a float.
In this function a ve_in struct enters

if (VE[i].x != ((float)ve_in[i].x)/1000.00)
{
printf("Xold = %f , Xnew = %f\n",VE[i].x, ((float)ve_in[i].x)/1000.00);

VE[i].x = ((float)ve_in[i].x)/1000.00;
}

Even if it prints that the values are equal, it still enter in the statement.
Can you give me some advice?

Thanks!

[cire]

Even if it prints that the values are equal, it still enter in the statement.

Try:
printf("Xold = %f.20 , Xnew = %f.20\n",VE[i].x, ((float)ve_in[i].x)/1000.00);

printf limits decimal precision to 6 by default (which means you get a truncated value) and float arguments are promoted to double when fed to printf

You may also find the following link of interest:
http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html