jazz

Can anyone tell wat does this do?? -


Thankx
jazz

thondal

I can't tell you(cus i don't know), but why not google for some c tutorials while waiting and see if not one of those covers it..

-thondal-

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jazz

In C tutorials i have seen- in fopen there are only two parameters passed. But in the above there are 3 paramenters, is it that-

1)fp_time is read into Time_file??
2)then in fread why are fp_time and Time_File both parameters passed??

Can u please explain, i could'nt understand that.

thankx
jazz

Benoit

I can't find either of those on google...maybe its because they're preceded by an underscore, but _FOpen(Time_File,"r",fp_time); looks like
which opens the file whose name is pointed to by *path, and assosiates *stream with it. Its just quicker than doing fclose then open again.

_Fread(&st_Time,sizeof(TimeHead),1,fp_time,TimeFile); Looks like the standard
which simply reads size*memb bytes from *stream to *ptr, where size is the size of each array element, and memb is the number of elements you want to read.

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jazz

does it mean that it is opening and reading 2 files at a time??

grumpy

Neither _FOpen() and _FRead() are standard C functions. They are probably vendor specific extensions or (as Benoit has suggested) wrappers for freopen() and fread(). freopen() is used to open a file in place of an existing open stream; it typically does this by closing the open stream (not by opening two files at once).

jim mcnamara

They can also be macros for fopen and fread.

And the C99 standard for freopen is to return a stream identifier, having tried to close the existing one first, with the new one aimed at another file. Think of it as associating an already open stream to another file. The most common use being redirection of stdin, stdout, stderr.

linxis

FOPEN is C++

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DaWei

Excuse me?? Please try to avoid misleading people.

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Arevos

DaWei's correct, as usual. fopen is part of the C standard library in stdio.h.

You might be thinking of ifstream and ofstream, which are C++ specific.