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    <pre><code>#include &lt;iostream&gt; #include &lt;sstream&gt; double strToDouble(std::string const &amp;numberString) { std::istringstream inStream(numberString); double doubleValue; std::cout &lt;&lt; doubleValue &lt;&lt; '\n'; inStream &gt;&gt; doubleValue; if(!(inStream &amp;&amp; (inStream &gt;&gt; std::ws).eof())) { return 0.0; } return doubleValue; }; int main() { std::cout &lt;&lt; strToDouble("0.1") &lt;&lt; '\n'; return 0; } </code></pre> <p>The above code gives me the following output:<br> -2.36907e-39<br> 0.1</p> <p>Are you by chance checking the value of doubleValue before returning?</p> <hr> <pre><code>Cluster::Cluster(string latString, string lngString) { // mark our vectors vector&lt;string&gt; latStoreString; vector&lt;string&gt; lngStoreString; // Explode our input strings. explode(",", latString, latStoreString); explode(",", lngString, lngStoreString); for( int i = 0; i &lt; latStoreString.size(); i++) { // Grab the latitude and store it. string tempLat = latStoreString[i]; std::cout &lt;&lt; "tempLat=" &lt;&lt; tempLat &lt;&lt; '\n'; double latDouble = strToDouble(tempLat); std::cout &lt;&lt; "latDouble=" &lt;&lt; latDouble &lt;&lt; '\n'; latStore.push_back( strToDouble(tempLat) ); // Grab the longitude and store it. string tempLng = lngStoreString[i]; lngStore.push_back( strToDouble(tempLng) ); } } int main (int argc, char * const argv[]) { Cluster *rect = new Cluster("0.1,0.4","0.1,0.4"); return 0; } </code></pre> <p>Output:<br> tempLat=0.1<br> latDouble=0.1<br> tempLat=0.4<br> latDouble=0.4 </p> <p>Can you run the code with these modifications (you weren't using the int parameter in the ctor, so I just removed it). I also ran your code using valgrind without errors (only memory leaks).</p>
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    1. POUnexpected results using istringstream for string to double conversion in C++
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    1. USStephen Newell
    1. USStephen Newell
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    1. COForgot to mention compiler info: g++ (Gentoo 4.3.4 p1.0, pie-10.1.5) 4.3.4
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      1. USStephen Newell
    2. CO... when I run that code I get: 6.95322e-310 0 Now I'm really confused.
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      1. USDrew
    3. COWhen I run that as 10.6 (see comment on question), it works, but as 10.5, it stills spits out 0's. I think it's a bug with my IDE.
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