Read file in C++ (fseek(fi, 0L, SEEK_SET);

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I speak a little English and I hope you understand. Thank you very much!
I have a problem

In my file has code...
"fseek(fi, 0L, SEEK_SET);"

I don't known what is characters "0L"? As I know this position("0L") is a number, but this has "L". You can explain to me? Thank you very much.

Posted 4-Dec-13 14:58pm

kimnguyentran

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User 59241 · Accepted Answer · 2013-12-04T15:11:00

Google is the best way to answer this type of basic question.
If you look at fseek you will find the second parameter offset is a long integer.
www.cplusplus.com/reference/cstdio/fseek/[^]

0L is a way of telling the compiler that you don't want 0 int but you want 0 long int.

http://forums.codeguru.com/showthread.php?154957-What-does-0L-mean&p=427386#post427386[^]

Monte_Cristo · Accepted Answer · 2013-12-04T15:16:00

Solution 2

I guess 0L is to indicate the 0 number is in Long type, as the function requires long number at that point

I remember to indicate 0.0 in floating point, we can write 0.0f too

Hope this help you!

By the way, are you Vietnamese kimnguyentran??

Posted 4-Dec-13 15:16pm

Monte_Cristo

Updated 4-Dec-13 15:22pm

v2

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kimnguyentran 4-Dec-13 23:58pm

Thank you @pwasser!

@Monte_Criso! I'm vietnamese.
and you?