[buffer] Forum Topics

Hi guys I've written a very simple program that reads in some files, does some cleanup on the data and then creates a sql statement to insert the data into a table. Now I have 125 of these fies of varying sizes and on some (not all) of the files …

My question is clear ^^ How to clear keyboard buffer?

I'm trying to get values from DataGridView to the another form in textboxes and in Picturebox ,data in textboxes are there ok, but when I try to get a picture in a picturebox from DB it gives me this error. Buffer cannot be null Parameter name :buffer and here is …

Hello everyone, I am working on one program that generates a lot of data...eventually it can be in GB range. And the way I am doing it now is just by writing to ascii file everything time... like this: ofstream flowC("outputfile.out"); // declared at the start flowC << prevsid << …

So, I'm trying out a project on my own because I have no real clue how to do anything complex or useful in C++ (applications for example). This project calls for creating a simple console text editor with basic functionality (buffer, command set, redisplay). The problem is that I don't …

Hello, Today I was working on my home Pc. As I work my 2nd job from home. I was working away and clicked some random news site and all of a sudden Mcfee says they have blocked a trojan, and then get a little box pops up wanting me to …

Hi, I've just started learning Python and for my first script I wanted to make something that would make life easier and that I would actually use, so starting small I've began working on a Torrent Search script that uses the ISOHunt API. However I've ran into a problem in …

Hey guys, I'm loading from a dictionary with a variable called "buffer". I'm trying to copy "buffer" in to another array word for word. For some reason, when I try using `strncpy()`, it yields a segfault. Here is my code (assuming "LETTERS" is 29: bool load(string filename) { // open …

Good evening all, Currently I am working on a program that will automate the backup/restore jobs at the place I work. The rough work has been done, but I am somewhat concerned about the possibility of massive IO operations due to the way my program works. Here is the scenario: …

Hi, I'm doing a study planner in java. I'm doing a simple login system. For every user who registers a text file is created holding all of the information inputted during registration. This is the code of a method which the program uses to login the user: public void loginUser(){ …

Hello everyone. 1)I am trying several days now to display an image from file Chooser in Netbeans. i have read and tried many different approaches from the web, but something goes wrong.Although the program runs ok,I see no results.Until now, I have used the "Design" tab of Netbeans to create …

int main(void) { char faceValue[2]; char suitValue[2]; //User enters the value of their hole cards. setCardFaceValue(faceValue); setCardSuitValue(suitValue); for(int i=0;i<2;i++) printf("Element %i: %c %c\n",i,faceValue[i],suitValue[i]); return 0; } void setCardFaceValue(char* face) { char card[2][20] = {"left card:","right card:"}; for(int i=0;i<2;i++) { printf("Enter face value for "); for(int x=0;x<19;x++) { printf("%c",card[i][x]); if(card[i][x] == …

Okay, so this is my final assignment for a class I am taking. I'm making a Book Library Database that keeps track of all books that are entered and changed, things like that. I figured a useful feature would be saving your data in a text file so that it …

Hi. I'm having a problem with a module in a program written in powerbuilder An event is triggered when the user change the focus to a specified textbox the event creates local variables that I set to null, then I read a string that comes from the lecture of a …

[CODE]Sub retrievepic() Dim conn As New SqlConnection("data source=.\sqlexpress; integrated security=true; attachdbfilename=|datadirectory|\WAIS.mdf; user instance=true;") Dim cmd As New SqlCommand("select ImageData from ImagesStore where ImageId=@ImageId", conn) cmd.Parameters.AddWithValue("@ImageId", 3) Try conn.Open() PictureBox1.Image = Image.FromStream(New IO.MemoryStream(CType(cmd.ExecuteScalar, Byte()))) Catch ex As Exception MsgBox(ex.Message) Finally conn.Close() End Try End Sub [/CODE] This is my code for …

please some one would explain me why we use Bufferedreader() instead of using InputStreamReader() only.

Isn't it better to use the BufferedReader function readLine() instead of read() or read(byte[])? The reason I ask is because of potential memory wastage by the read() function. If I specify a byte array of size 10, then it will become capable of accepting ten bytes from the transmitter. However, …

[CODE]print "creating a text file" text_file = open("write_it.txt", "a") score = 5 name = raw_input("What's your name?: ") score = (score, name) text_file.write(score) text_file.close()[/CODE] getting TypeError: expected a character buffer object Please help. Thanks

Hi All, I am trying to load from a .dat file a collection of student objects However on load it only loads the first student and then stops I've tried to put print messages in but with all the nulls I really can't seem to work out what is happening. …

So I have a component that renders very slowly. The problem is that I can only render inside the event handling thready, which shouldn't be freezed. Long ago in pascal/assembly I used backbuffer and page flipping. I've read that Java supports double buffering, but no info about thread safety. So …

HI, I am looking for faster input and output method for the C other than just normal scanf and printf modules. Please elaborate by simple example. thanks :)

I'm using sockets in C to write 10 bytes to a socket and then read 10 bytes from that socket. I create a parent process that forks, creating a child that acts as the socket server that writes the 10 bytes. After the 10 bytes are wrote, back in the …

Hello, I currently have this code to buffer an image: [CODE] public void paintComponent(Graphics g){ Graphics2D g2 = (Graphics2D) g; ImageIcon icon = new ImageIcon("back.gif"); Image image = icon.getImage(); BufferedImage buff = new BufferedImage(image.getWidth(this), image.getHeight(this), BufferedImage.TYPE_INT_ARGB); Graphics2D b = (Graphics2D) buff.createGraphics(); b.drawImage(image,imgX,imgY,this); b.setColor(Color.BLUE); b.fillRect((window.getWidth()/2)-13, (window.getHeight()/2)-13, 26, 26); g2.drawImage(buff, 0, 0, …

Hi! I read the clearing input buffer article on the top of the c++ forum but I don't really get it, and it doesn't work. This is my problem, I know that cin is just like a file in that it has a buffer (correct me if I'm wrong, I …

Can anyone please give me a guideline on how to code the following? I have an MFC application which should call on a timer basis a python script from command line and read the ouput of that command line. I thought of using CreateProcess, but i have no clue of …

It's only reading every other line. It's supposed to print out: 28 80.0 22 1 2 2 3 1 3 But it's only reading: 80.0 1 2 1 [CODE]//Load button - #=daynum, $=wallet, @=inventory, &=employees, !=customers if (btn2.getText().equals("Load")){ int id=0; File file = new File("savefile1.txt"); BufferedReader reader = null; try …

Hi all, I'm writing a simple encryption algorithm and have stumbled upon a problem relating to the file handling itself. What my program does is reads text from a file, encrypts it, and writes it to another file. That's all well and good, and it works fine - until a …

I'm working on a project that utilizes producers and consumers for an operating systems class. Each producer and each consumer will be its own thread. The producers will generate records that will be stored in a global buffer, in which the consumer will then access to use the data. I …

Hi all, i'm working on some exercises which i have to load data from Image library. I write a load function and it work fine except when the number of images in the library becomes large. At this moment, the limited number if around 700 images. When the number reaches …