Databases
StackOverflow2013
Postsdbo
POfile manipulation
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POfile manipulation
    primarykey
    data
    text
    <p>in c++ i have written a simple program, which accepts 4 to 6 records and then do not accept any more when airline_no is same i.e. 1? The source code is:</p> <pre><code>#include&lt;fstream.h&gt; #include&lt;conio.h&gt; #include&lt;dos.h&gt; #include&lt;string.h&gt; #include&lt;stdlib.h&gt; #include&lt;process.h&gt; #include&lt;stdio.h&gt; int lno; struct airln {int airline_no,routeno,dep_time,arr_time; char port_d[15],port_a[15],week_day[10]; }r2; class route { public: void getroute() { cout&lt;&lt;"\n\tRoute no.: "; cin&gt;&gt;r2.routeno;cout&lt;&lt;"\n"; cout&lt;&lt;"\tDay of Departure: "; gets(r2.week_day);cout&lt;&lt;"\n"; cout&lt;&lt;"\tAirport for departure: "; gets(r2.port_d);cout&lt;&lt;"\t"; cout&lt;&lt;"Departure Time: "; cin&gt;&gt;r2.dep_time;cout&lt;&lt;"\n"; cout&lt;&lt;"\tAirport for arrival: "; gets(r2.port_a);cout&lt;&lt;"\t"; cout&lt;&lt;"Arrival Time: "; cin&gt;&gt;r2.arr_time;cout&lt;&lt;"\n"; cout&lt;&lt;"\n\tAirline no.: "; cin&gt;&gt;r2.airline_no; } void display_route() { cout&lt;&lt;"\n Route No : ";cout&lt;&lt;r2.routeno; cout&lt;&lt;"\n "; cout&lt;&lt;r2.port_d;cout&lt;&lt;"\t"; cout&lt;&lt;r2.dep_time;cout&lt;&lt;"\t\t"; cout&lt;&lt;r2.port_a;cout&lt;&lt;" \t"; cout&lt;&lt;r2.arr_time;cout&lt;&lt;"\t\t"; cout&lt;&lt;r2.week_day;cout&lt;&lt;"\n"; } }r3; void main() { clrscr(); int airlnno,rtnodel,cntr; char airlinename[30]; ifstream fin,fin1; ofstream fout; do { cout&lt;&lt;"\t1. Insert Data.\n"; cout&lt;&lt;"\t2. View Data.\n"; cout&lt;&lt;"\t3. Exit.\n"; cout&gt;&gt;"\tEnter Choice : ";cin&gt;&gt;cntr; switch(cntr) { case 1:r3.getroute(); fout.open("testdata.dat",ios::app); if(!fout) { gotoxy(25,10); cout&lt;&lt;"No file exists or file can\'t be opened\n"; gotoxy(25,22); cout&lt;&lt;"Please Press Any Key to Continue......."; getch(); clrscr(); } fout.write((char *) &amp;r2,sizeof(r2)); fout.close(); clrscr(); break; case 2:fin.open("testdata.dat",ios::in); if(!fin) { gotoxy(25,20); cout&lt;&lt;"No file exists or file can\'t be opened\n"; gotoxy(25,22); cout&lt;&lt;"Please Press Any Key to Continue......."; getch(); clrscr(); break; } cout&lt;&lt;"\n Dep-Airport\t"; cout&lt;&lt;"Dep-Time\t"; cout&lt;&lt;"Arr-Airport\t"; cout&lt;&lt;"Arr-Time\t"; cout&lt;&lt;"Week Day\n"; fin.read((char *) &amp;r2,sizeof(r2)); while(!fin.eof()) { r3.display_route(); fin.read((char *) &amp;r2,sizeof(r2)); } fin.close(); gotoxy(25,22); cout&lt;&lt;"Please Press Any Key to Continue......."; getch(); clrscr(); } } while(!(cntr==3)); } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USMac
    1. USS Chow
    plurals
    1. PL
      singulars
      1. LTLinked
    2. PL
      singulars
      1. LTLinked
    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. VO
      singulars
      1. POfile manipulation
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
      singulars
      1. POfile manipulation
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POfile manipulation
      1. This table or related slice is empty.
      1. VTModeratorReview
    1. COYou might want to reformat the code so it is readable using the 'code' block, and you also might want to add the 'homework' tag to your tags.
      singulars
      1. POfile manipulation
      1. USjacknad
    2. COYour code is very unclear. Name your variables correctly. Use new lines in your code correctly. Also, you should drop the dos.h and conio.h dependencies (get rid of clrscr and gotoxy statements in your code) first get the functionality working only then work on the presentation of the output.
      singulars
      1. POfile manipulation
      1. USElf King
    3. COWhy void main() ? It should be int. http://stackoverflow.com/questions/204476/what-should-main-return-in-c-c
      singulars
      1. POfile manipulation
      1. USDumbCoder
 

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