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POc++ reading in text file into vector<vector> then writing to vector or array depending on first word in internal vector
 

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  1. POc++ reading in text file into vector<vector> then writing to vector or array depending on first word in internal vector
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    <p>this is a progression from the question I posted <a href="https://stackoverflow.com/questions/18818777/c-program-for-reading-an-unknown-size-csv-file-filled-only-with-floats-with">c++ program for reading an unknown size csv file (filled only with floats) with constant (but unknown) number of columns into an array</a> . Im now moving onto the real application where I read in a file like:</p> <pre><code>MESH2D MESHNAME "default coverage" NUM_MATERIALS_PER_ELEM 1 E4Q 1 19 20 14 16 2 E4Q 2 17 16 15 23 2 E4Q 3 22 15 14 21 2 E4Q 4 4 3 21 20 1 E4Q 5 6 20 19 7 1 E4Q 6 18 17 10 9 1 E4Q 7 17 23 12 11 1 E4Q 8 7 19 18 8 1 E4Q 9 22 1 13 23 1 E3T 10 14 20 21 2 E3T 11 21 2 22 1 E3T 12 21 3 2 1 E3T 13 22 2 1 1 E3T 14 5 20 6 1 E3T 15 20 5 4 1 E3T 16 16 14 15 2 E3T 17 23 13 12 1 E3T 18 22 23 15 2 E3T 19 17 11 10 1 E3T 20 17 18 16 2 E3T 21 8 18 9 1 E3T 22 18 19 16 2 ND 1 -3.25811078e+002 7.70285567e+001 0.00000000e+000 ND 2 -3.24209146e+002 7.60394871e+001 0.00000000e+000 ND 3 -3.23012110e+002 7.44783503e+001 0.00000000e+000 ND 4 -3.22754089e+002 7.25326647e+001 0.00000000e+000 ND 5 -3.23617358e+002 7.08079432e+001 0.00000000e+000 ND 6 -3.25161538e+002 6.98134116e+001 0.00000000e+000 ND 7 -3.27128620e+002 6.98759747e+001 0.00000000e+000 ND 8 -3.29095703e+002 6.99385378e+001 0.00000000e+000 ND 9 -3.30301095e+002 7.14667646e+001 0.00000000e+000 ND 10 -3.30786908e+002 7.33241555e+001 0.00000000e+000 ND 11 -3.30835733e+002 7.52916270e+001 0.00000000e+000 ND 12 -3.29587322e+002 7.65401204e+001 0.00000000e+000 ND 13 -3.27743000e+002 7.72270000e+001 0.00000000e+000 ND 14 -3.26108525e+002 7.32067724e+001 0.00000000e+000 ND 15 -3.27041416e+002 7.42070316e+001 0.00000000e+000 ND 16 -3.27350377e+002 7.31716751e+001 0.00000000e+000 ND 17 -3.29153676e+002 7.40024406e+001 0.00000000e+000 ND 18 -3.28659180e+002 7.19967464e+001 0.00000000e+000 ND 19 -3.26845856e+002 7.14062637e+001 0.00000000e+000 ND 20 -3.25000347e+002 7.20534611e+001 0.00000000e+000 ND 21 -3.24701329e+002 7.39638966e+001 0.00000000e+000 ND 22 -3.26167714e+002 7.53360591e+001 0.00000000e+000 ND 23 -3.28060316e+002 7.54194849e+001 0.00000000e+000 BEGPARAMDEF GM "Mesh" SI 0 DY 0 TU "" TD 0 0 NUME 3 BCPGC 0 DISP_OPTS entity 0 0 0 0 1 0 0 0 DISP_OPTS inactive 0 0 0 0 1 0 0 0 DISP_OPTS multiple 0 0 0 0 1 0 0 0 BEFONT 0 1 DISP_OPTS entity 1 0 0 0 1 0 0 0 DISP_OPTS inactive 1 0 0 0 1 0 1 0 DISP_OPTS multiple 1 0 0 0 1 0 1 0 BEFONT 1 1 DISP_OPTS entity 2 0 0 0 1 0 0 0 DISP_OPTS inactive 2 0 0 0 1 0 1 0 DISP_OPTS multiple 2 0 0 0 1 0 1 0 BEFONT 2 1 MAT 1 "material 01" MAT 2 "material 02" MAT_MULTI 0 ENDPARAMDEF BEG2DMBC END2DMBC BEGCURVE Version: 1 ENDCURVE </code></pre> <p>called 'example.2dm' and try and write 3 2d vectors (or possibly (preferably) arrays) for the data stored in lines starting with E4Q E3T and ND. I want to use these cell difinitions to print a file with cell centres.</p> <p>I think this sort of problem is very usefull to be documented on here as my last question keeps getting views.</p> <p>My code so far is:</p> <pre><code>// Read in CSV // // Alex Byasse #include &lt;algorithm&gt; #include &lt;fstream&gt; #include &lt;iostream&gt; #include &lt;iterator&gt; #include &lt;sstream&gt; #include &lt;string&gt; #include &lt;vector&gt; #include &lt;cstdlib&gt; enum case_name {e3t, e4q, nd}; case_name checkit(std::string const&amp; inString) { if (inString == "E3T") return e3t; if (inString == "E4Q") return e4q; if (inString == "ND") return nd; } int main() { std::vector&lt;std::vector&lt;std::string&gt;&gt; values; std::ifstream fin("example.2dm"); for (std::string line; std::getline(fin, line); ) { std::istringstream in(line); values.push_back( std::vector&lt;std::string&gt;(std::istream_iterator&lt;std::string&gt;(in), std::istream_iterator&lt;std::string&gt;())); } int nc = 0; int nn = 0; std::vector&lt;std::vector&lt;double&gt;&gt; cells; std::vector&lt;std::vector&lt;double&gt;&gt; nodes; for (int i = 0; i &lt; values.size() - 1; i++) { switch (checkit(values[i][0])){ case e3t: cells[nc].push_back(std::stod(values[i][1])); cells[nc].push_back(std::stod(values[i][2])); cells[nc].push_back(std::stod(values[i][3])); cells[nc].push_back(std::stod(values[i][4])); cells[nc].push_back(std::stod(values[i][2])); cells[nc].push_back(std::stod(values[i][5])); nc++; break; case e4q: cells[nc].push_back(std::stod(values[i][1])); cells[nc].push_back(std::stod(values[i][2])); cells[nc].push_back(std::stod(values[i][3])); cells[nc].push_back(std::stod(values[i][4])); cells[nc].push_back(std::stod(values[i][5])); cells[nc].push_back(std::stod(values[i][6])); nc++; break; case nd: nodes[nn].push_back(std::stod(values[i][1])); nodes[nn].push_back(std::stod(values[i][2])); nodes[nn].push_back(std::stod(values[i][3])); nn++; break; } } } </code></pre> <p>Can I get some help fixing this code and also. Is this correct?</p> <pre><code>#include &lt;cstdlib&gt; </code></pre> <p>Im getting the following compilation error:</p> <pre><code>$ g++ read_csv2.cpp -std=c++0x read_csv2.cpp: In function ‘int main()’: read_csv2.cpp:44:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:45:33: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:46:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:47:33: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:48:33: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:49:33: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:53:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:54:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:55:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:56:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:57:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:58:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:62:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:63:26: error: ‘stod’ is not a member of ‘std’ read_csv2.cpp:64:26: error: ‘stod’ is not a member of ‘std’ </code></pre> <p>I'm running g++ on cygwin. I've checked the man pages and -std=c++11 is an available option and I've tryed it yet I get the same error?</p>
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    1. CO`std::stod` is a c++11 thing, you need to add `-std=c++11` to the compile command line. As a side note, when you keep editing the code it makes the answers less relevant since they were based on the old code.
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    2. CO@RetiredNinja: Im using that as stated in my question under the error. Im using cygwin cgg-c++ 4.7.3 and -std=c++11 but still got the same error??
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    3. COhttp://stackoverflow.com/questions/16132176/problems-with-stdstoi-not-working-on-mingw-gcc-4-7-2
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