io

问题 I've been learning assembly language recently, and I already know how to use the in/out command. But I have some questions: where did the port addresses come from, like 0x70. How do I know how many ports my computer has and the addresses of them. I've checked the Intel developer's manual, but I can't find the answer. Thank you for your attention 回答1: There's a maximum of 65536 IO ports, and most aren't used. The IO ports that are used on a modern PC can be split into 2 categories: PCI devices

问题 I am trying to get the 1220 vertices data and save them to the iPhone file. The problem I am having is I could not get the captured data and write them into the JSON structure correctly. I have: struct CaptureData { var vertices: [SIMD3<Float>] var verticesFormatted : String { let v = "<" + vertices.map{ "\($0.x):\($0.y):\($0.z)" }.joined(separator: "~") + "~t:\(String(Double(Date().timeIntervalSince1970)))>" return "\(v)" } var jsonDict:Dictionary<String, Any> = [ "facetracking_data" : "1",

问题 I am trying to get the 1220 vertices data and save them to the iPhone file. The problem I am having is I could not get the captured data and write them into the JSON structure correctly. I have: struct CaptureData { var vertices: [SIMD3<Float>] var verticesFormatted : String { let v = "<" + vertices.map{ "\($0.x):\($0.y):\($0.z)" }.joined(separator: "~") + "~t:\(String(Double(Date().timeIntervalSince1970)))>" return "\(v)" } var jsonDict:Dictionary<String, Any> = [ "facetracking_data" : "1",

问题 I want to save some data to the storage (internal/external) of an Anroid device. I found this post where they got the external storage path with the following line: var sdCardPath = Android.OS.Environment.ExternalStorageDirectory.Path; Seems fair. But my Visual Studio says the following: The name 'Android' does not exist in the current context So I've been wondering in which namespace does this Android reside? I tried quite a lot (e.g. AutoImport, but that seems to give me the wrong parent;

问题 I am working through a problem in the C ansi programming book. I am asking the user for input until there is no end of line. However, i'd like to have the characters moved to the next line once 10 characters have been reached. However, the newline character only works after hitting enter. Shouldn't a new line be outputted once i == 10? #include <stdio.h> #define MAXLINE 10 // count number of chars, once it reaches certain amount int main() { int i,c; for (i=0;(c=getchar()) != EOF; i++) { if

问题 When I run my scala code (I'm using SBT), the prompt is displayed after I enter some text as shown here: C:\... > sbt run [info] Loading project definition [...] [info] Set current project to [...] Running com[...] test >> exit >> >> >> >> >> >> [success] Total time[...] It seems like it's stacking up the print() statements and only displaying them when it runs a different command. If I use println() it works as it should (except that I don't want a newline) The code: ... def main(args:Array

问题 I'm learning about I/O and the stream abstraction. I came across this little toy example which should open a stream attached to a text file and display the content (simple ASCII text) to the default destination attached to System.out, the console.. It doesn't display a thing,where am I wrong? import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; public class Test { public static void main(String[] args) throws IOException

问题 I have a function which reads PIN from terminal and stores PIN and PIN length in the variables passed. On the first call to the function I get expected PIN and PIN length entered. However, during the second call to this function the first character is omitted. /* * Function : read_pin(char *pin,int *pin_len) * Description : Read entered PIN and stores PIN in pin and pin length in pin_len */ int read_pin(unsigned char *pin,unsigned int *pin_len) { int err = EXIT_SUCCESS; char ch; fflush(stdout

问题 I have a function which reads PIN from terminal and stores PIN and PIN length in the variables passed. On the first call to the function I get expected PIN and PIN length entered. However, during the second call to this function the first character is omitted. /* * Function : read_pin(char *pin,int *pin_len) * Description : Read entered PIN and stores PIN in pin and pin length in pin_len */ int read_pin(unsigned char *pin,unsigned int *pin_len) { int err = EXIT_SUCCESS; char ch; fflush(stdout

问题 I have a function which reads PIN from terminal and stores PIN and PIN length in the variables passed. On the first call to the function I get expected PIN and PIN length entered. However, during the second call to this function the first character is omitted. /* * Function : read_pin(char *pin,int *pin_len) * Description : Read entered PIN and stores PIN in pin and pin length in pin_len */ int read_pin(unsigned char *pin,unsigned int *pin_len) { int err = EXIT_SUCCESS; char ch; fflush(stdout