Computer Science Canada program reading and writing problem, complicated with gui |

Author: | hey_joe42 [ Fri Mar 07, 2003 10:03 am ] |

Post subject: | program reading and writing problem, complicated with gui |

i have a gui program it attached just in case but the main problem is the reading and writign to the binary file here is the reading code(my goal is to have it read it into a variable that displays the text, string, int, real, in the gui text fields it will work if i get this one problem fixed): type inventory : record product : string (10) %the product's name manufacturer : string (10) %The company that made product price : real %the products price%real number : int %the number of products in the warehouse%int reorder : int %the number which to order more; unsafe number%int numinstock : int %the number that should be kept in stock %int prodnumber : string ( 8 ) %the products id number %string %amtorder : int %the ammount to order cater : string (10) %what the product catergories as %ammount to reorder, %product number sale : boolean end record var prod : array 1 .. 50 of inventory var numRecords : int := 1 var currentRecord : int := 1 var produ : array 1 .. 50, 1 .. 9 of string var pos : int var recordnumb :=1 open : fn, "inventoryss.bin",read, seek put fn delay(1000) if fn = 1 then put"hi" delay(5000) seek : fn, * tell : fn, pos put sizeof(inventory) put pos recordnumb := pos div (sizeof (inventory)) put recordnumb delay(1000) for i : 1 .. recordnumb put fn read : fn, prod (i) put prod(i).product,"..." delay(1000) produ (i, 1) := prod (i).product put produ(i,1) delay(100) produ (i, 2) := prod (i).manufacturer produ (i, 3) := intstr (prod (i).number) produ (i, 4) := realstr (prod (i).price, 8 ) produ (i, 5) := intstr (prod (i).reorder) produ (i, 6) := intstr (prod (i).numinstock) produ (i, 7) := prod (i).prodnumber produ (i, 8 ) := prod (i).cater if prod (i).sale = true then produ (i, 9) := "yes" else produ (i, 9) := "no" end if end for for z:recordnumb+1..50 put z produ (z, 1) := "" produ (z, 2) := "" produ (z, 3) := "0" produ (z, 4) := "0" produ (z, 5) := "0" produ (z, 6) := "0" produ (z, 7) := "111-11" + intstr (z) produ (z, 8 ) := "" produ (z, 9) := "" end for else for z:recordnumb..50 produ (z, 1) := "" produ (z, 2) := "" produ (z, 3) := "0" produ (z, 4) := "0" produ (z, 5) := "0" produ (z, 6) := "0" produ (z, 7) := "111-11" + intstr (z) produ (z, 8 ) := "" produ (z, 9) := "" end for end if close : fn %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% This is the writing to the file part: loop if buttonmoved ("down") then buttonwait ("down", mx, my, mbtn, mbtn) if mbtn = 1 then if mx > 15 and mx < 35 and my > 13 and my < 30 then %close:fn put currentRecord put produ (1, 3) open : fn, "inventorys.bin", write, mod, seek, read for i : 1 .. currentRecord - 1 % prod (i).product := produ (i, 1) prod (i).manufacturer := produ (i, 2) if strintok (produ (i, 3)) then put "asdf" prod (i).number := strint (produ (i, 3)) put prod (i).number end if if strrealok (produ (i, 4)) then put "sdf" prod (i).price := strreal (produ (i, 4)) end if if strintok (produ (i, 5)) then put "sd" prod (i).reorder := strint (produ (i, 5)) end if if strintok (produ (i, 6)) then prod (i).numinstock := strint (produ (i, 6)) end if prod (i).prodnumber := produ (i, 7) prod (i).cater := produ (i, 8 ) if produ (i, 9) = "yes" or produ (i, 9) = "true" then prod (i).sale := true else prod (i).sale := false end if seek : fn, (sizeof (inventory) * (i - 1)) write : fn, prod (i) %read:fn, prod(i) %put prod(i).product %delay(1000) %close : fn % goes to help end for close : fn end if if mx > 225 and mx < 250 and my > 13 and my < 30 then quit end if end if end if exit when GUI.ProcessEvent end loop %%%%%%%%%%%%%%%%%%%%%%% If your looking at this, and might have an idea, plz give feedback, advice, etc, websites whatever, tho if you think it might be a problem somewhere else feel free to check the file, run it or whatnot, it will work i presume if you change the beginning in read; change the line that says, if fn=1 to if fn=10 |

Author: | Tony [ Fri Mar 07, 2003 11:44 am ] |

Post subject: | |

I dont exactly understand your problem... If you're reading a value, shoudn't you know what type it is based on file format? otherwise you can read everything as a string, then use strint and strreal to convert it to other formats. If thats not it, plz specify whats wrong |

Author: | hey_joe42 [ Mon Mar 10, 2003 5:52 pm ] |

Post subject: | solved reading problem stuck on writing |

im going to post this msg twice because i really need an answer on this question okay i solved the original reading problem i was having( you can see for yourself how i did so) but now i can't figure out the writing to a file part, Plz try out the program yourself cuz the problem probably lies somewhere else, thank you for your time! here is my code for writing to the file: var font1:int font1 := Font.New ("serif:12") loop if buttonmoved ("down") then buttonwait ("down", mx, my, mbtn, mbtn) if mbtn = 1 then if mx > 15 and mx < 35 and my > 13 and my < 30 then %close:fn open : fn, "inventory.bin", write, mod, seek, read for i : 1 .. currentRecord - 1 % prod (i).product := produ (i, 1) prod (i).manufacturer := produ (i, 2) if strintok (produ (i, 3)) then prod (i).number := strint (produ (i, 3)) end if if strrealok (produ (i, 4)) then prod (i).price := strreal (produ (i, 4)) end if if strintok (produ (i, 5)) then prod (i).reorder := strint (produ (i, 5)) end if if strintok (produ (i, 6)) then prod (i).numinstock := strint (produ (i, 6)) end if prod (i).prodnumber := produ (i, 7) prod (i).cater := produ (i, 8) prod(i).sale:=produ(i,9) seek : fn, (sizeof (inventory) * (i - 1)) Font.Draw ("Writing to file!", 50, 30, font1, red) write : fn, prod (i) delay(5000) Font.Draw("Writing to file!",50,30,font1,white) %read:fn, prod(i) %put prod(i).product %delay(1000) %close : fn % goes to help end for close : fn end if if mx > 225 and mx < 250 and my > 13 and my < 30 then quit end if end if end if exit when GUI.ProcessEvent end loop |

Author: | Tony [ Tue Mar 11, 2003 12:01 pm ] |

Post subject: | |

to be honest, I dont know about reading/writing to a binary file. When I need random access, I usually use a database such as MS Access or MySQL. And I cant say where the problem is since I cant even run the file. Datafile is missing. |

Author: | hey_joe42 [ Wed Mar 12, 2003 12:13 pm ] |

Post subject: | data file |

heres the datafile just change the file name to .bin or change it in the program to .t |

Author: | Tony [ Wed Mar 12, 2003 10:57 pm ] |

Post subject: | |

first of all... your add record doesnt work... some value for settext price is missing as for writing part, you got a loop running 1 .. currentRecord - 1 so its running from 1 to 0, which means NOTHING will be writen to the file. here's the kicker - you need to add more records to save something, but that brings us back to the "add record" function that doesnt work |

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