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acw83

Strings and windows

7 posts in this topic

Create a variable called tmp. Like char tmp[256]; for instance. Correct me if I'm wrong, but I think it's:

_ltoa(tmp, fps, 10);

That will place fps as a string in tmp. You could always use sprintf if you need extra info in there.

For the output, try a Sleep(15000); or something.

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The wsprintf() function works like printf() but copies text into a string buffer instead of sending it to default output. Then you can use all the standard printf() formatting.

TCHAR szTempString[50];

wsprintf(szTempString, " %i frames per second", fps)
MessageBox(hwnd, szTempString, NULL, NULL);


the wsprintf() function is also unicode friendly if you're bracing for Windows 2000.

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It compilse and runs fine, but teh number showed is nowhere NEAR the actual fps...


int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{


double fps;
double testnum;

unsigned long framecounter = 0;

double totaltime = 0;
long curtime = 0;

MessageBox(NULL, "To start click OK and wait 10 seconds.", "Windows Benchmark",MB_OK);

long starttime = GetTickCount();

while(curtime < 10000)
{
for(int res = 0; res < 65536; res++)
{
testnum = sqrt(2);
}

curtime = GetTickCount() - starttime;
framecounter++;
}

totaltime = (GetTickCount() - starttime)/1000;
fps = framecounter/totaltime;

TCHAR szTempString[50];

wsprintf(szTempString, " %i", fps);
MessageBox(NULL, szTempString, "Windows Benchmark, FPS:",MB_OK);

return 0;
}

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The %i indicates that an interger follows. In true C style, they don't care what the acual data type is, you can either cast

(int) fps

or use %d instead of %i to indicate a double precision fp number.

If you do a google or altavista search on printf() you should be able to get a good list of how to format everything.

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%d is for decimal integer

%f is typically used for double and floating-point.

"%04.1f" is one example that gives you 1 decimal point to the right of the decimal

Keeb

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I have two questions:

1) I have a double variable called fps. How can I display it as a string in the MessageBox function?

2) How do I keep a console app from closing immediately after it is over, I can't see my final output because the app closes. Thanks.

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