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POTrying to pass a pointer as a parameter to a member of fstream that points to a file
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  1. POTrying to pass a pointer as a parameter to a member of fstream that points to a file
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    copied!<p>/* Thanks to anyone looking at this who might attempt to answer it. I'm really not trying to waste anyone's time here, but I have beat my head on this for about three days. I realize it is probably very simple for someone who understands it. I have tried most every possible combination I can think of and still get compiler errors. </p> <p>C:\random\RNDNUMTEST.cpp(41) : error C2102: '&amp;' requires l-value</p> <p>I am trying to pass a pointer as a parameter to a function makeRndmNumber() for the member function fstream.open(). I want to open the file in RNDNUMTEST.cpp and then pass it to makeRndmNumber() so that it can be modified in some way. I have looked online for help, including this website, but I feel like I am overlooking something important or simple or maybe I am just missing the concept altogether. </p> <p>This isn't for homework, I'm not a college student. Although I did go to school for it, it has been over 10 years since I've done any programming and I never really understood this that well to begin with. Any suggestions would be appreciated. </p> <pre><code>// These are only excerpts from the actual files. // RndmNum_Class.h file typedef void(fstream::*fStream_MPT)(const char*); // fStream_MPT (Member Pointer Type) class RandomNumber { public: RandomNumber(); ~RandomNumber() {}; static void loadDigits(double, double, char array[]); static int getLastNDigits(char array[], int); static int makeRndmNumber(int, int, fStream_MPT); }; //*************************************************************8 //RndmNum_Class.cpp file int RandomNumber::makeRndmNumber(int seed, int _fileSize, fStream_MPT FILE) { ...... } //**************************************************************/ // RNDNUMTEST.cpp file #include "RndmNum_Class.h" int main() { const char* RNDM_FILE = "c:\\RandomFile.txt"; fstream FStream_Obj; // FStream_Obj.open(RNDM_FILE); fStream_MPT FileMembPtr = &amp;FStream_Obj.open(RNDM_FILE); //fStream_MPT FileMembPtr = &amp;fstream::open; int seed = 297814; int size = 20000; cout &lt;&lt; RandomNumber::makeRndmNumber(seed, size, FileMembPtr); return 0; } </code></pre>
 

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