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POOfstream not creating a new file correctly
 

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  1. POOfstream not creating a new file correctly
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    <p>I've tried to write a simple database program. The problem is that ofstream does NOT want to make a new file.</p> <p>Here's an extract from the offending code.</p> <pre><code>void newd() { string name, extension, location, fname; cout &lt;&lt; "Input the filename for the new database (no extension, and no backslashes)." &lt;&lt; endl &lt;&lt; "&gt; "; getline(cin, name); cout &lt;&lt; endl &lt;&lt; "The extension (no dot). If no extension is added, the default is .cla ." &lt;&lt; endl &lt;&lt; "&gt; "; getline(cin, extension); cout &lt;&lt; endl &lt;&lt; "The full directory (double backslashes). Enter q to quit." &lt;&lt; endl &lt;&lt; "Also, just fyi, this will overwrite any files that are already there." &lt;&lt; endl &lt;&lt; "&gt; "; getline(cin, location); cout &lt;&lt; endl; if (extension == "") { extension = "cla"; } if (location == "q") { } else { fname = location + name + "." + extension; cout &lt;&lt; fname &lt;&lt; endl; ofstream writeDB(fname); int n = 1; //setting a throwaway inteher string tmpField, tmpEntry; //temp variable for newest field, entry for(;;) { cout &lt;&lt; "Input the name of the " &lt;&lt; n &lt;&lt; "th field. If you don't want any more, press enter." &lt;&lt; endl; getline(cin, tmpField); if (tmpField == "") { break; } n++; writeDB &lt;&lt; tmpField &lt;&lt; ": |"; int j = 1; //another one for (;;) { cout &lt;&lt; "Enter the name of the " &lt;&lt; j++ &lt;&lt; "th entry for " &lt;&lt; tmpField &lt;&lt; "." &lt;&lt; endl &lt;&lt; "If you don't want any more, press enter." &lt;&lt; endl; getline(cin, tmpEntry); if (tmpEntry == "") { break; } writeDB &lt;&lt; " " &lt;&lt; tmpEntry &lt;&lt; " |"; } writeDB &lt;&lt; "¬"; } cout &lt;&lt; "Finished writing database. If you want to edit it, open it." &lt;&lt; endl; } } </code></pre> <p>EDIT: OK, just tried</p> <pre><code>#include &lt;fstream&gt; using namespace std; int main() { ofstream writeDB ("C:\\test.cla"); writeDB &lt;&lt; "test"; writeDB.close(); return 0; } </code></pre> <p>and that didn't work, so it is access permission problems.</p>
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    1. USIt'sNotALie.
    1. USIt'sNotALie.
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    1. COgive an example of a program execution and what you're inputting.
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      1. USSyntactic Fructose
    2. COalso you don't need "double backslashes" when inputting the string this way, only for string literals in your code.
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      1. POOfstream not creating a new file correctly
      1. USHerrJoebob
    3. COReduce your source to *only* show the problem. Then verify that this indeed *is* the problem. I would guess, you try to open a file in a funny location which doesn't exist. A simple program to verify that `std::ofstream` works as expected would be this: `#include <fstream> int main() { std::ofstream out("empty.txt"); }`. Going from there verify where the created file ceases to be created.
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      1. POOfstream not creating a new file correctly
      1. USDietmar Kühl
 

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