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POvector in function - how to do return
 

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  1. POvector in function - how to do return
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    <p>I've got a function that should read from file line by line, the reading stops when a line does not begin with '>' or ' '. It should store the lines in vector and return it. <br>This is code:<br></p> <pre><code> #include &lt;cstdlib&gt; #include &lt;iostream&gt; #include &lt;string&gt; #include &lt;stdio.h&gt; #include &lt;fstream&gt; #include &lt;vector&gt; using namespace std; string getseq(char * db_file) // gets sequences from file { string seqdb; vector&lt;string&gt; seqs; ifstream ifs(db_file); string line; //vector&lt;char&gt; seqs[size/3]; while(ifs.good()) { getline(ifs, seqdb); if (seqdb[0] != '&gt;' &amp; seqdb[0]!=' ') { seqs.push_back(seqdb); } } ifs.close(); //return seqs; //return seqs; } int main(int argc, char * argv[1]) { cout &lt;&lt; "Sequences: \n" &lt;&lt; getseq(argv[1]) &lt;&lt; endl; return 0; } </code></pre> <p>Compiler (g++) returns:<br></p> <pre><code> fasta_parser.cpp: In function ‘std::string getseq(char*)’: fasta_parser.cpp:32: error: conversion from ‘std::vector&lt;std::basic_string&lt;char, `std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt;, std::allocator&lt;std::basic_string&lt;char, std::char_traits&lt;char&gt;, std::allocator&lt;char&gt; &gt; &gt; &gt;’ to non-scalar type ‘std::string’ requested` </code></pre> <p>Anyone has any idea?</p> <p>Edit: As Skurmendel ask, I am adding whole code because of memory security violation after </p> <p>executing compiled code: <br><br></p> <pre><code>#include &lt;cstdlib&gt; #include &lt;iostream&gt; #include &lt;string&gt; #include &lt;stdio.h&gt; #include &lt;fstream&gt; #include &lt;vector&gt; using namespace std; vector&lt;string&gt; getseq(char * db_file) // pobiera sekwencje z pliku { string seqdb; vector&lt;string&gt; seqs; ifstream ifs(db_file); string line; //vector&lt;char&gt; seqs[size/3]; while(ifs.good()) { getline(ifs, seqdb); if (seqdb[0] != '&gt;' &amp; seqdb[0]!=' ') { seqs.push_back(seqdb); } } ifs.close(); return seqs; } int main(int argc, char * argv[1]) { vector&lt;string&gt; seqs; // Holds our strings. getseq(argv[1]); // We don't return anything. // This is just a matter of taste, we create an alias for the vector&lt;string&gt; iterator type. typedef vector&lt;string&gt;::iterator string_iter; // Print prelude. cout &lt;&lt; "Sekwencje: \n"; // Loop till we hit the end of the vector. for (string_iter i = seqs.begin(); i != seqs.end(); i++) { cout &lt;&lt; *i &lt;&lt; " "; // Do processing, add endlines, commas here etc. } cout &lt;&lt; endl; } </code></pre>
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    1. USPatryk Czachurski
    1. USMateusz Korycinski
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    2. VO
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    1. COWhat do you want to return? The vector or the string?
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      1. USUltraInstinct
    2. CO[Don't](http://stackoverflow.com/questions/4881210/how-to-convert-a-string-to-a-ifstream/4881251#4881251) use [while](http://stackoverflow.com/questions/4324441/getlinestreamobj-line-reads-last-line-multiple-times/4324667#4324667) (stream. [good](http://stackoverflow.com/questions/4874530/fstream-unix-problem-in-reading/4874650#4874650) ()).
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      1. USFred Nurk
    3. CO@Thrustmaster: vector @Fred Nurk: Why and what I need to use instead?
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      1. POvector in function - how to do return
      1. USMateusz Korycinski
 

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