How do you pass a file handle to a function in Standard C

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2.33/5 (3 votes)

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Could someone please show me how to pass an active, open file handle to a function? I need to use a function to fprintf a coverpage in a .txt file.

UPDATE from OP:

C#

Is this right?
void printHeading(FILE *outHandle);
void printCoverPage(FILE *outHandle);

int main()
{
      FILE *inFile;
      FILE *outFile;
      printCoverPage(outFile);
      printHeading(outFile);
}
void printHeading(FILE *outHandle)
{
      outHandle = fopen(fileName, "w");
}
void printCoverPage(FILE *outHandle)
{
      outHandle = fopen(fileName, "w");
}

Posted 2-Mar-11 11:48am

brainflex

Updated 2-Mar-11 20:19pm

Sandeep Mewara

v2

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Comments

Sergey Alexandrovich Kryukov 2-Mar-11 17:58pm

Why it is a problem? Did you try to do it?
I saw, 3 or more similar questions almost at the same time. What, are you all from the same school getting identical assignments or examination questions?
--SA

brainflex 2-Mar-11 18:16pm

Yes, my class has 33 students and we all have the same assignment. I read your response but it does not SHOW how to do it.

Albert Holguin 2-Mar-11 18:44pm

we're not here to do your homework

CPallini 3-Mar-11 3:31am

Nope it is wrong in many ways. For instance the file pointers are passed as [in] parameters, but you're using them, inside the functions as if they was [out] ones.

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OriginalGriff · Answer 1 · 2011-03-02T20:43:00

Solution 2

Rule one: Research.

A very quick search of just this site shows several of the answers give to your classmates. Look at them. They give the answer.

This one spells it out: And the answerer is as new to this site as you are...

Passing a File Handle as a parameter to a function?[^]

Posted 2-Mar-11 20:43pm

OriginalGriff