Why about -1.#IND000000000

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//
here call a LibFun() from Static Lib A or Static Lib B, C, ...
//

int nNum = 60;
double dBeginTime = m_pCurImageList->m_dBeginTime;//m_pCurImageList->m_dBeginTime==1271819811.9210
//Execute OK

double dEndTime = m_pCurImageList->m_dEndTime；//m_pCurImageList->m_dEndTime==1271819814.3280;
//Execute OK

double dSpanTime = (dEndTime - dBeginTime) / nNum;
//Execut Eerror. Debug shows "dSpanTime == -1.#IND000000000"

time_t nSumTime = (time_t)((dEndTime - dBeginTime) * 1000.0);
//Execut Eerror. Debug shows nSumTime == 0；

What reaseons can cause it ?? And Why?

Thanks a lot.

PS: The code is executed in a single thread.
It must happen after the thread calls a funciton from Static Lib A.
But everything is normal if thread calls function from any other Static Lib B, C, ...

Posted 20-Apr-10 18:13pm

GreenISnow

Updated 20-Apr-10 19:02pm

Saurabh.Garg

v2

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4 solutions

Solution 2

Thanks.

//
here call a LibFun() from Static Lib A or Static Lib B, C, ...
//

int nNum = 60;double dBeginTime = 1271819811.9210
//Execute OK

double dEndTime = 1271819814.3280;
//Execute OK

double dSpanTime = (dEndTime - dBeginTime) / nNum;
//Execut Eerror. Debug shows "dSpanTime == -1.#IND000000000"

time_t nSumTime = (time_t)((dEndTime - dBeginTime) * 1000.0);
//Execut Eerror. Debug shows nSumTime == 0；

The problem remains.

double dTmp = 2.407 / nNum;//Problem ramins.

Posted 20-Apr-10 19:17pm

GreenISnow

Updated 20-Apr-10 23:05pm

v3

Solution 4

To Saurabh.Garg

Thanks a lot.

VC6.0 is being used.

Now I locate the problem in the Static Lib A ( because any other lib is OK).

Some ASM code exists in the Lib.

It's OK before the ASM code, but error after it.

So I think the problem may be caused by the ASM code.

Now the author of the ASM code is checking it.

thank you very much.

Posted 20-Apr-10 23:10pm

GreenISnow

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Saurabh.Garg · Accepted Answer · 2010-04-20T19:14:00

Solution 1

You code looks okay.

-1.#IND means result of

C++

(dEndTime - dBeginTime) / nNum

its not a number. This can happen if numbers are used without being initialized or for cases like 0/0, 0/∞, ∞/∞, etc. Can you check the value of the variables again?

-Saurabh

Posted 20-Apr-10 19:14pm

Saurabh.Garg

Saurabh.Garg · Accepted Answer · 2010-04-20T22:55:00

Solution 3

Which compiler are you using? Are you modifying FP control register?

VC++ 9.0 give me these values:

dSpanTime = 0.040116667747497559
nSumTime = 2407
dTmp = 0.040116666666666669

-Saurabh

Posted 20-Apr-10 22:55pm

Saurabh.Garg