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    <p>Take a look at this solution for your problem, I suggest to you to use stl sort algorithm for sort the output and struct for store data.</p> <pre><code>#include &lt;algorithm&gt; #include &lt;string&gt; #include &lt;vector&gt; #include &lt;iostream&gt; #include&lt;fstream&gt; using namespace std; #define MAX 1005 struct record{ string A,B,C,D; record(string A, string B, string C, string D) : A(A), B(B), C(C), D(D) {} bool operator &lt; (const record&amp; o) const { string tmp1 = A + " " + B + " " + C + " " + D; string tmp2 = o.A + " " + o.B + " " + o.C + " " + o.D; return (tmp1 &lt; tmp2); } }; int main() { string A,B,C,D; vector&lt;record&gt; my_vect; vector&lt;record&gt;::iterator it; ifstream inFile; inFile.open("test1.rtf"); while(inFile &gt;&gt; A &gt;&gt; B &gt;&gt; C &gt;&gt; D) { if(B == "OUT:") my_vect .push_back( record(A,B,C,D) ); } inFile.close(); sort(my_vect.begin(), my_vect.end()); ofstream outFile; outFile.open("test2.rtf"); for(it = my_vect.begin(); it != my_vect.end(); ++it) { outFile &lt;&lt; (*it).A &lt;&lt; " " &lt;&lt; (*it).B &lt;&lt; " " &lt;&lt; (*it).C &lt;&lt; " " &lt;&lt; (*it).D &lt;&lt; endl; } outFile.close(); return 0; } </code></pre> <p>The output for this algo is:</p> <pre><code>15:39:32 OUT: "RS5K_700.EXE" CONHorodeski@ALNWSPCNTRCTR1 15:40:10 OUT: "RS5K_700.EXE" CONHorodeski@ALNWSPCNTRCTR1 15:40:31 OUT: "RS5K_700.EXE" CONHorodeski@ALNWSPCNTRCTR1 15:47:10 OUT: "RS5K_700.EXE" SYSTEM@ALNWSPCNTRCTR1 16:07:48 OUT: "RS5K_700.EXE" CONHorodeski@ALNWSPCNTRCTR1 16:10:15 OUT: "RS5K_700.EXE" CONHorodeski@ALNWSPCNTRCTR1 17:01:49 OUT: "RS500.EXE" mlulchak@alnsvpmillterm 9:30:28 OUT: "RS5K_700.EXE" CONHorodeski@ALNWSPCNTRCTR1 </code></pre>
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    1. POString Compare C++
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    1. USLuis Daniel
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    1. COIs not necesary to use map, because with this you get an innecesary complexity of O(log n) for inserting and getting data every time. You just need to sort the correctly list once using the sort algorithm from stl.
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      1. USLuis Daniel
    2. COIt looks like you just wrote all the 'sign outs' to a file. I need to eliminate all 'OUTS:' that have a matching 'IN:'
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