Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I think it is worth starting at the beginning: although it works to have a fixed size buffer to read into, I think it is easier to use a <code>std::string</code> to capture each line. Further, you should <em>always</em> test after reading if the read operation was successful. That is, I would write an outer loop processing individual lines:</p> <pre><code>for (std::string line; std::getline(std::cin &gt;&gt; std::ws, line); ) { // process each individual line } </code></pre> <p>The use of the manipulator <code>std::ws</code> will make thing inside the loop a bit easier: it skips all whitespace, e.g., leading spaces on a line and empty lines. That is, if <code>std::getline()</code> managed to read a line, it is already known that this line isn't empty.</p> <p>Based on what you wrote about your functions, it seems they get different parameters. So I would create a string stream to process an individual line, read the first word as a command and depending on that split read further parameters:</p> <pre><code>std::istringstream sin(line); std::string command; if (sin &gt;&gt; command) { if (command == "add") { int number; std::string name; if (sin &gt;&gt; number &gt;&gt; name) { entity(number, name); } else { std::cout &lt;&lt; "ERROR: failed to read add command from '" &lt;&lt; line &lt;&lt; "'\n"; } else if (command == "???") { // ... } else { std::cout &lt;&lt; "ERROR: unrecognized command on line '" &lt;&lt; line &lt;&lt; "'\n"; } } </code></pre> <p>It would be possible to write a function which determines the parameters from a function pointer passed to it, reads those, and calls the function but this would require a few advanced techniques. Based on your question providing that answer would provide you with a solution which is probably a bit too complicated.</p>
    singulars
    1. This table or related slice is empty.
    1. POImplementing an user interface based on text commands in C++
      singulars
      1. PTQuestion
    1. PTAnswer
    1. This table or related slice is empty.
    1. USDietmar Kühl
    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. This table or related slice is empty.
    1. This table or related slice is empty.
 

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