Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I think what's happening is that ofstream does not know how to serialize your struct.</p> <p>You may need to define >> and &lt;&lt; operators for InventoryItem:</p> <pre><code>ofstream&amp; operator &lt;&lt; ( ofstream&amp; ofs, InventoryItem&amp; ); ifstream&amp; operator &gt;&gt; ( ifstream&amp; ifs, InventoryItem&amp; ); </code></pre> <p>Edit::</p> <p>Here's a fully worked example. I was little off on the ifstream before the edit. <code></p> <pre><code>#include &lt; iostream &gt; #include &lt; fstream &gt; #include &lt; string &gt; struct InventoryItem{ std::string name; int id; float price; }; using std::ofstream; using std::ifstream; ofstream&amp; operator &lt;&lt; (ofstream&amp; ofs, InventoryItem&amp; ii) { ofs &lt;&lt; ii.name &lt;&lt; std::endl &lt;&lt; ii.id &lt;&lt; std::endl &lt;&lt; ii.price &lt;&lt; std::endl; return ofs; } ifstream&amp; operator &gt;&gt; ( ifstream&amp; ifs, InventoryItem&amp; ii ) { ifs &gt;&gt; ii.name &gt;&gt; ii.id &gt;&gt; ii.price; return ifs; } void printItem(const InventoryItem&amp; ii) { std::cout &lt;&lt; "Name: " &lt;&lt; ii.name &lt;&lt; std::endl &lt;&lt; "ID: " &lt;&lt; ii.id &lt;&lt; std::endl &lt;&lt; "Price: " &lt;&lt; ii.price &lt;&lt; std::endl; } int main() { ofstream outfile("testout.txt"); InventoryItem list[] = { {"Item1", 1, 1.5}, {"Item2", 2, 2.5} }; outfile &lt;&lt; list[0] &lt;&lt; list[1]; outfile.close(); std::ifstream infile("testout.txt"); InventoryItem list2[2]; infile &gt;&gt; list[0] &gt;&gt; list[1]; printItem(list[0]); printItem(list[1]); return 0; } </code></pre> <p></code></p> <p>The expected output is:</p> <pre> Name: Item1 ID: 1 Price: 1.5 Name: Item2 ID: 2 Price: 2.5 </pre>
    singulars
    1. This table or related slice is empty.
    1. POCompile error C++: could not deduce template argument for 'T'
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USNaxos
    1. USNaxos
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COHey, I did that and it says it has too few parameters. Can you give me an example of what kind of parameters I need to put in ?
      singulars
      1. PO
      1. USOneShot
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload