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问题 This is the text file named "TextFile.txt" Stat Rain 1 16 2 34 3 24 4 23 5 21 6 19 7 17 8 35 9 27 And here is my c++ code: #include<iostream> #include<fstream> using namespace std; char Station[9]; char Rainfall[9]; int i; int j; int s[23]; double r[23]; main() { ifstream Read; Read.open("TextFile.txt"); Read>>Station;//I don't want this Read>>Rainfall;//I have no choice then I just assign these two variables i=0; while(!Read.eof())//This is the only I want { i++; Read>>s[i]>>r[i]; } Read

问题 I need to delete the nth matching line in a file from the match up to the next blank line (i.e. one chunk of blank line delimited text starting with the nth match). 回答1: This will delete a chunk of text that starts and ends with a blank line starting with the fourth blank line. It also deletes those delimiting lines. sed -n '/^$/!{p;b};H;x;/^\(\n[^\n]*\)\{4\}/{:a;n;/^$/!ba;d};x;p' inputfile Change the first /^$/ to change the start match. Change the second one to change the end match. Given

问题 I made a sample code in VS 2013 preview, I made a line inside a canvas with stroke color of white, but the line is shown so strangely like more thick and not white (almost gray). same sample I tried it in VS 2010 and it output well. Can anyone tell me what's going on...? <Canvas Width="200" Height="200" Background="Black"> <Line X1="30" Y1="60" X2="90" Y2="60" Stroke="White" StrokeThickness="1"/> <Line X1="60" Y1="30" X2="60" Y2="90" Stroke="White" StrokeThickness="1"/> </Canvas> //EDIT when

问题 im developing a traffic application and there is a few traffic lines and warning markers on the road. I draw traffic lines according to zoom level. For example, If zoom level is over 10, im removing all lines and redraw for new zoom level. Because lines overflow on the road. I have lines over 400 for every zoom level. So every zoom in/ zoom out action, i remove and redraw. After a while my map begins to freeze and moving very slowly. Is there any caching operation on background? Because im

问题 I want to get all the x,y,z coordinates between 2 given points, on a straight line. I need to be able to do this in JavaScript for checking whether a projectile collides in my game. So, for example: Point 1: (0,0,0) Point 2: (2,2,2) -> 0,0,0 - 1,1,1, 2,2,2 Edit, here is working code for anybody who is lost. def ROUND(a): return int(a + 0.5) def drawDDA(x1,y1,z1,x2,y2,z2): x,y,z = x1,y1,z1 length = (x2-x1) if (x2-x1) > (y2-y1) else (y2-y1) if (y2-y1) > (z2-z1) else (z2-z1) dx = (x2-x1)/float

问题 I have an IRC client that people are chatting on while I broadcast my desktop. I wanted to show this on my broadcast and found a handy shock-wave flash title plug-in that can read text files and display them on the screen. My IRC client uses python scripts and can call a function every time someone write a message. I can write these text lines to a text file as they come in but I want some way of coding in python when there are more than 'say 4' lines of text in the file it removes the top

问题 So my problem is that when I'm editing an XML file (below) with some PHP lines, everything works the first time, and then it deletes false lines and creates the new ones in the wrong places. Here the PHP script for deleting the rows: <?php session_start(); // The file $filePath = '/....../test/test.xml'; // Grab file into an array, by lines $fileArr = file($filePath); // Remove desired line unset($fileArr[7]); // $fileArr[15] == line #16 unset($fileArr[16]); // idem unset($fileArr[25]); //

问题 I have a file named hdd_list.txt . Index: 0 Device Name: \Device\Harddisk0\Partition0 Drive: entire disk Label: Type: Harddisk Size: 55.899GB Index: 1 Device Name: \Device\Harddisk0\Partition1 Drive: C:\ Label: Type: Harddisk Size: 55.897GB Index: 2 Device Name: \Device\Harddisk1\Partition0 Drive: entire disk Label: Type: Harddisk Size: 465.761GB Index: 3 Device Name: \Device\Harddisk1\Partition1 Drive: E:\ Label: Backup Type: Harddisk Size: 465.758GB I need to retrieve Index number

问题 Actually there are some similar questions about this topic but I couldn't see the answer what I am looking for. For example I have drawn 2 lines on windows form and I want to delete one of them and keep the other , how can I do that? this.Invalidate(); or Graphics.Clear(); clear all the form, I don't want this, I want to delete specific line . Do you have any other solutions? 回答1: The following will delete the all created lines in reverse chronological sequence. Graphics g; Pen p; Bitmap bmp;

问题 Do you know how to draw line on the LinearLayout ? To create a LinearLayout , I am using a xml resource: @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_layout); LinearLayout linear = (LinearLayout)findViewById(R.id.linearlayout); //I wanna draw line on "linear" } Is it possible ? 回答1: There are many ways; one way is to define a ShapeDrawable representing the line in XML (in your res folder) and set that as the