eof

问题 I would like to know in what case we can have : bool(std::ifstream) != std::ifstream::good() The difference is that bool(std::ifstream) does not test the eof bit whereas std::ifstream::good() tests it. But practically, the eof bit is raised if one try to read something after the end of the file. But as soon as you try to do this I think that either fail or bad bit is also set. Consequently in what case you can only raise the eof bit ? 回答1: Simply put, whenever you encounter the end of a file

问题 I'm in the process of creating a program that reads data from an external file, compares it with other data within the file then prints the results to a new external file. I am having problems with the while loop section of my code. I am unsure whether it is the while loop itself or the for loop which is nested within. Here is the code: public class WageCalculator { public static void main(String[] args) throws FileNotFoundException { Scanner input = new Scanner(new FileReader("TestData.txt")

问题 I'm a beginner in C, and I've got problem I can't figure out, and wasn't able to find a solution on other threads here. I'm trying to read integers from a keyboard input/ txt file with the following code: int grades[MAX_GRADES_LENGTH]={0}, histogram[HISTOGRAM_SIZE]={0}; int maxGradesHistogramBucket=0, median=0, gradesLength=0; double avg=0.0; int grade=0; printf("Enter grades:\n"); while (scanf("%d",&grade) != EOF) { grades[gradesLength]=grade; gradesLength=gradesLength+1; } I'm supposed to

问题 I need to verify that the expression getchar() ! = EOF is 0 or 1 . My current code: #include <stdio.h> int main (int argc, char *argv[]) { int c; while (( c= getchar()) != EOF) { printf("%d ", c != EOF); putchar(c); } printf("\n%d\n", c != EOF); } When I try to run that I get 98980980 1 91 81 91 81 01 91 81 01 I`m not sure if I got this right. EDIT: Ok the question was actually " How to generate EOF " and the solution was to press ctrl+D. 回答1: I'm not very sure if you want this answer, but as

问题 I would like to read lines from console until EOF. I came up with this solution but I don't know if it is correct one. String line; while ((line = Console.ReadLine()) != null) { } 回答1: Console.ReadLine Method () returns : The next line of characters from the input stream, or null if no more lines are available. Question : I came up with this solution but I don't know if it is correct one! Answer : Yes, your code is correct. Also, please go through the added link in the answer to know more

问题 As a little background, I am quite new to the C Programming Language and as such have been attempting to work through some of the exercises in the second edition of the Kernighan & Ritchie manual. I do realize that I could probably deal with certain issues more succinctly by utilizing the standard library more, but am trying to keep my repertoire of useful commands in sync with the book as much as possible. If it makes a difference, I am compiling my source in a Windows XP environment using

问题 Currently in my Ruby on Rails application cucumber test are being run with the capybara gem and using selenium. Recently after a system update to Ubuntu 16.04 the tests started failing with EOFError: end of file reached errors Additionally, it also occasionally includes the following error. session not created exception from unknown error: Runtime.executionContextCreated has invalid 'context': {"auxData": "frameId":"14314.1","isDefault":true},"id":1,"name":"","origin":"://"} (Session info:

问题 I'm runnig Hadoop in pseudo-distributed mode. My new MR jobs throws EOF exception after Map step is complete in DataInputStream.readFully() method. The input/output formats are the same - SequenceFile. The similiar job runs fine, but the new one fails. Stacktrace: java.io.EOFException at java.io.DataInputStream.readFully(DataInputStream.java:180) at java.io.DataInputStream.readFully(DataInputStream.java:152) at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1520) at org

问题 I'm looping through each line of a TCP socket input using fdopen and fgets like this: int connfd = accept(listenfd, (struct sockaddr*)NULL, NULL); FILE *f; char line[1024]; f = fdopen(connfd, "a+"); while(fgets(line, sizeof(line), f) != NULL) { printf("%s", line); } printf("EOF"); fclose(f); The problem is that it looks like fgets never returns NULL for some strange reason. Is there any other way to check for EOF ? 回答1: You'll only receive and end of file on a socket if the socket gets closed

问题 I used the code below to copy from one binary file to another, but the first file contains some EOF indicators (0xFF) as part of it, so the copy function actually copies the file until its first EOF indicator. For example: if my file is {0x01, 0x02, 0x03, 0xFF, 0x01, 0x02, 0xFF, 0xFF} then only {0x01, 0x02, 0x03} will be copied to the new file. Any idea how to fix it (or maybe I'm missing something there...) Code: int Util_Copy_File(char* source, char* dest) { FILE *fs,*ft; char ch; char