jhoni rahmad wrote: > Dear C-prog, > > i'm developing software for barcode software, now i'm making software for PDT > CASIO DT930 (Portable data terminal). I get problem form my coding, i want to > take value from a record. This is example code : > > location code qty > 111 123456789 12 > 102 234567890 4 > 201 222222221 1 > > 1. it in text file. I want get qty from record using a search key with value > "123456789" > > 2. how to update that data
It looks like you have a fixed record length of sorts. fopen() the file in "r+b" mode. fread() each fixed record into memory. Once you find the record of interest, use fseek() with the SEEK_CUR option to seek backwards one record. Perform an update using fwrite(). > i'm include my source code here > > [Non-text portions of this message have been removed] (i.e. most likely you attached your source code to your e-mail) Due to several historical incidents involving computer viruses on c-prog, the group-wide policy of disallowing attachments to messages was instantiated by the c-prog group owner, Thomas Hruska (me). The simplest workaround to not having attachments is to just copy and paste the code directly into an e-mail. Doing it that way helps keep the conversation inline and actually encourages more responses from group members. Therefore, for garnering high-quality, timely responses from group members, it is in your best interest to use copy and paste. Some mail clients have difficulty transporting C/C++ code over the Internet. Most clients that have problems are webmail-oriented. The easiest and most friendly way to interact with c-prog is to use a dedicated e-mail client such as Outlook or Thunderbird and set your c-prog group settings to individual e-mails. Most webmail providers have instructions for setting up various popular dedicated e-mail clients. Additionally, unlike your personal e-mail, you have to contend with thousands of other users who are using all sorts of e-mail and webmail clients. If you set your outgoing e-mails to be plain-text and use bottom posting for your replies, your e-mails will have a higher level of readership than those who top-post and use HTML/Word e-mail. Should you still feel the need to upload a file, the c-prog website has a 'Files' section that periodically gets cleared out to make room for more files. You may upload your file there and reference it in your e-mails. Just be sure to specify which file it is you want people to be looking at in the e-mail. This approach garners fewer responses. Fewer people will put forth the significant effort necessary to view the file. Also, due to the nature of computer viruses, people will generally only open plain-text files instead of Word documents. Uploading a Word document is a guaranteed method of not getting any response. -- Thomas Hruska CubicleSoft President Ph: 517-803-4197 *NEW* MyTaskFocus 1.1 Get on task. Stay on task. http://www.CubicleSoft.com/MyTaskFocus/
