Databases
StackOverflow2013
Postsdbo
POC++ Binary File to Structure Function
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POC++ Binary File to Structure Function
    primarykey
    data
    text
    <p>I have a struct:</p> <pre><code> struct zipType{ int postalCode; double longitude; double latitude; }; </code></pre> <p>And I have a function called zipToCout:</p> <pre><code> void zipToCout(zipType zip){ cout &lt;&lt; "Postal Code = " &lt;&lt; zip.postalCode &lt;&lt; "\tLongitude = " &lt;&lt; zip.longitude &lt;&lt; "\t\tLatitude = " &lt;&lt; zip.latitude &lt;&lt; endl; } </code></pre> <p>now I need a function to read a binary file into a zipType struct. The function prototype is supposed to be <code>void binRead(zipType *zip, fstream *input);</code>. The only way I can get close to this is by changing the prototype to this <code>void binRead(zipType &amp;zip, fstream &amp;input)</code>. With that, Here is what I currently have for the function:</p> <pre><code> void binRead(zipType &amp;zip, fstream &amp;input){ int temp; double temp2; zipType tempZip; tempZip = zip; //cout &lt;&lt; "Reader at location " &lt;&lt; input.tellg() &lt;&lt; endl; input.read((char*)&amp;temp,sizeof(int)); tempZip.postalCode=temp; input.read((char*)&amp;temp2,sizeof(double)); tempZip.longitude=temp2; input.read((char*)&amp;temp2,sizeof(double)); tempZip.latitude=temp2; zipToCout(tempZip); } </code></pre> <p>This is the output I get when I run this on my sample.bin file:</p> <pre><code> Postal Code = 64501 Longitude = 2.61457e-261 Latitude = -7.13357e+288 </code></pre> <p>What I need help with is reformatting the function to use <code>*</code>'s instead of <code>&amp;</code>'s and fixing how to read the file into the three variables correctly. Thanks for looking! Also, I only have to read one zipType from the file at this point. </p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USYu Hao
    1. USuser2990286
    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. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COWhen you used `zipType*` did you also use `->` instead of `.` to access the structure members?
      singulars
      1. POC++ Binary File to Structure Function
      1. USJim Rhodes
 

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