weird double values on cout

[Gyiove]

Hello!

Here is code first:

//fp_screen.h
class fp_screen{
	public:
double fps;
double xx3;


// fp_Screen.cpp
fp_screen::init() // called before everything
{
fps = 0.0;
xx3 = 0.0;
}

bool fp_screen::frame()// called everyframe
{
fps = 1.0 / xx3;
// if i put cout here everything is fine
// in main_frame() things get weird
// im only checking screen.fps not changing value there
r = main_frame();
}

// main.cpp
void main_frame()
{
cout << "fps:" << screen.fps << endl;
}

fps:1.16922e+006 // this will happen 80%
fps:900 // this is how it should be

if i do
cout << "fps:" << (int)screen.fps << endl;
somethings number is right like 800 or else
put sometimes its 5423423... something.


What is going on here?

[MiiNiPaa]

You probably printing uninitialized value of fps. Make sure that init is surely called, and better move init code to the constructor or call it from constructor.

[Gyiove]

Updated code.

I think i know what the problem is.
If that fps get too big like 2000 or something it will do that thing.

[MiiNiPaa]

xx3 = 0.0;

fps = 1.0 / xx3;
Err, division by 0? Post full code, there is still too little information to be sure.

[Gyiove]

gametime = (double)(xx10.QuadPart - xx12.QuadPart) / xx1;
xx3 = gametime - xx4;
xx4 = gametime;
fps = 1.0 / xx3;

They are all initalized correctly.
edit, test xx3 with cout, working fine.

[Gyiove]

Problem solved i think.

// I calculate fps outside here
	if( xx5 < gametime )
	{
		r = main_frame();
		xx5 = gametime + xxfps_max;
	}

The problem is when im not calling that main_frame
my fps will be 1000000 something.
1.0 / 1000000
will give so many you know, those numbers what come after '.'
Anyway, everything is working fine i guess.
I did not believe that my fps can be so big when i'm not calling main_frame
I guess i should really check out the reason why after calling main_frame fps will be 2000 <