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POC++ I/O Rereading a file after EOF (was: Parsing a Comma Delimited Text File)
 

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  1. POC++ I/O Rereading a file after EOF (was: Parsing a Comma Delimited Text File)
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    <p>Lets take a look at the code:</p> <pre><code>#include &lt;iostream&gt; #include &lt;fstream&gt; #include &lt;string&gt; #include &lt;cstdio&gt; #include &lt;cstdlib&gt; using namespace std; int main() { string usrFileStr, fileStr = "airNames.txt", // declaring string literal sLine; // declaring a string obj fstream inFile; // declaring a fstream obj char ch; cout &lt;&lt; "Enter a file: "; cin &gt;&gt; usrFileStr; inFile.open( usrFileStr.c_str(), ios::in ); // at this point the file is open and we may parse the contents of it while ( !inFile.eof() ) { getline ( inFile, sLine ); // store contents of txt file into str Obj for ( int x = 0; x &lt; sLine.length(); x++ ) { if ( sLine[ x ] == ',' )break; // when we hit a comma stop reading //cout &lt;&lt; sLine[ x ]; } cout &lt;&lt; endl; } while ( !inFile.eof() ) //read the file again until we reach end of file { // we will always want to start at this current postion; inFile.seekp( 6L, ios::cur ); getline( inFile, sLine ); // overwrite the contents of sLine for ( int y = 0; y &lt; sLine.length(); y++ ) { if ( sLine[ y ] == ',' )break; // hit a comma then goto seekp until eof cout &lt;&lt; sLine[ y ]; } cout &lt;&lt; endl; } inFile.clear(); inFile.close(); fgetc( stdin ); return 0; } </code></pre> <p>My text file format is similar to this:</p> <pre><code>string, string andthenspace, numbers, morenumbers </code></pre> <p>It doesn't look like I'm able to read the file twice..Checking for EOF each time.. The first while condition works, and it gives me what I need, the first field before the comma, and not including the comma.</p> <p>So the second time I thought, ok just the seekp(X, ios::cur) function to start there on each iteration of the second while..</p> <p>Unfortunately, it's not reading the file a second time..</p>
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