passing stdio stream to another function c++

Question

I have a function that opens and writes some stuff to a stdio FILE* stream. I then call another function that will build an xml that I want to then write to that same stream. Rather than passing that string xml back to the original function, because it may get very big, can I pass that open stream to the xmlbuilder function and continue writing to the same stream, and where it left off, while in the xmlBuilder function?

Terrible mistmatch of tag (c++) and mechanism - C-style `FILE*` — SergeyA, Apr 07 '16 at 21:16
hmmm, that's odd, I had 'c-style' tag there along with 'stream' but only three of them showed up. — Saif Ahsanullah, Apr 07 '16 at 21:17

score 3 · Accepted Answer · answered Apr 07 '16 at 21:12

Sure, something like this:

void writeOtherStuff(FILE* pFile)
{
    fputs("some more data\n", pFile);
}

void myFunction()
{
   FILE* pFile = fopen("myfile.txt", "w");
   if (!pFile)
       return;
   fputs("some data\n", pFile);
   writeOtherStuff(pFile);
   fclose(pFile);
}

jotik · Answer 2 · 2016-04-07T21:20:04.983

2

Yes you can. Passing a FILE * pointer is no different from passing any other type of pointer.

edited Apr 07 '16 at 21:20

answered Apr 07 '16 at 21:12

jotik

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passing stdio stream to another function c++

2 Answers2