funny gettimeofday

[heavenscape <masonduan1 sina com>]

I have following code:

....
gettimeofday(&tv1,NULL);

// do something here

gettimeofday(&tv2,NULL);

printf("Elapsed time is: %d seconds\n", tv2.tv_sec-tv1.tv_sec);

///////////////////////////////////////////////////////////////
each time I get the following outcome:
Elapsed time is: -1140166903 seconds
Elapsed time is: -1140114602 seconds
.......

Anyone knows why?



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