Eof Error In C Language

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What Is The Value Of Eof In C Language

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Eof Error Java

x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up eof error in python End of File (EOF) in C up vote 33 down vote favorite 23 I am currently reading the book C Programming Language by Ritchie & Kernighan. And I am pretty confused about the usage of EOF in the getchar() function. First, I want to know why the value of EOF is -1 and why the value of getchar()!=EOF is 0. Pardon me for my eof error golang question but I really don't understand. I really tried but I can't. Then I tried to run the example on the book that can count the number of characters using the code below but it seems that I never get out of the loop even if I press enter so I am wondering when would I reach the EOF? main(){ long nc; nc = 0; while (getchar() != EOF) ++nc; printf("%ld\n", nc); } Then, I read the same problem at Problem with EOF in C. Most people advised that instead of using EOF, use the terminator \n or the null terminator '\0' which makes a lot of sense. Does it mean that the example on the book serves another purpose? c eof share|improve this question edited Jan 27 '13 at 7:52 taskinoor 31.3k672109 asked Dec 5 '10 at 12:18 newbie 4,3972175116 3 You do understand that the book you mention is by the original authors of the C language, right? –David Gelhar Dec 5 '10 at 12:24 I almost duped this question. –Nicholas Pickering Feb 26 '13 at 1:21 EOF is -1. coool

the operation. Since EOF is used to report both end of file and random errors, it’s often better to use the feof function to check explicitly for end of file and ferror to check for errors. These functions check indicators that

Eof Error When Reading A Line

are part of the internal state of the stream object, indicators set if the appropriate eof error in jmeter condition was detected by a previous I/O operation on that stream. Macro: int EOF This macro is an integer value that is

Eof Error Python Raw_input

returned by a number of narrow stream functions to indicate an end-of-file condition, or some other error situation. With the GNU C Library, EOF is -1. In other libraries, its value may be some other negative number. This http://stackoverflow.com/questions/4358728/end-of-file-eof-in-c symbol is declared in stdio.h. Macro: int WEOF This macro is an integer value that is returned by a number of wide stream functions to indicate an end-of-file condition, or some other error situation. With the GNU C Library, WEOF is -1. In other libraries, its value may be some other negative number. This symbol is declared in wchar.h. Function: int feof (FILE *stream) Preliminary: | MT-Safe | AS-Safe | AC-Unsafe lock | See POSIX Safety https://www.gnu.org/s/libc/manual/html_node/EOF-and-Errors.html Concepts. The feof function returns nonzero if and only if the end-of-file indicator for the stream stream is set. This symbol is declared in stdio.h. Function: int feof_unlocked (FILE *stream) Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts. The feof_unlocked function is equivalent to the feof function except that it does not implicitly lock the stream. This function is a GNU extension. This symbol is declared in stdio.h. Function: int ferror (FILE *stream) Preliminary: | MT-Safe | AS-Safe | AC-Unsafe lock | See POSIX Safety Concepts. The ferror function returns nonzero if and only if the error indicator for the stream stream is set, indicating that an error has occurred on a previous operation on the stream. This symbol is declared in stdio.h. Function: int ferror_unlocked (FILE *stream) Preliminary: | MT-Safe | AS-Safe | AC-Safe | See POSIX Safety Concepts. The ferror_unlocked function is equivalent to the ferror function except that it does not implicitly lock the stream. This function is a GNU extension. This symbol is declared in stdio.h. In addition to setting the error indicator associated with the stream, the functions that operate on streams also set errno in the same way as the corresponding low-level functions that operate on file descriptors. For example, all of the functions that perform output to a stream—such as fputc, printf, and fflush&mda

data source is usually called a file or stream. In general, the EOF is either determined when the reader returns null as seen in Java's BufferedReader,[2] or sometimes people will manually insert an https://en.wikipedia.org/wiki/End-of-file EOF character of their choosing to signal when the file has ended. In the C Standard Library, the character reading functions such as getchar return a value equal to the symbolic value (macro) EOF to http://www.linuxquestions.org/questions/programming-9/how-to-print-eof-in-c-programming-4175438859/ indicate that an end-of-file condition has occurred. The actual value of EOF is system-dependent (but is commonly -1, such as in glibc[3]) and is unequal to any valid character code. Block-reading functions return the eof error number of bytes read, and if this is fewer than asked for, then the end of file was reached or an error occurred (checking of errno or dedicated function, such as ferror is often required to determine which). EOF character[edit] This section relies largely or entirely upon a single source. Relevant discussion may be found on the talk page. Please help improve this article by introducing citations to eof error in additional sources. (March 2015) Input from a terminal never really "ends" (unless the device is disconnected), but it is useful to enter more than one "file" into a terminal, so a key sequence is reserved to indicate end of input. In UNIX the translation of the keystroke to EOF is performed by the terminal driver, so a program does not need to distinguish terminals from other input files. By default, the driver converts a Control-D character at the start of a line into an end-of-file indicator. To insert an actual Control-D (ASCII 04) character into the input stream, the user precedes it with a "quote" command character (usually Control-V). AmigaDOS is similar but uses Control-\ instead of Control-D. In Microsoft's DOS and Windows (and in CP/M and many DEC operating systems), reading from the terminal will never produce an EOF. Instead, programs recognize that the source is a terminal (or other "character device") and interpret a given reserved character or sequence as an end-of-file indicator; most commonly this is an ASCII Control-Z, code 26. Some MS-DOS programs, including parts of the Microsoft MS-DOS shell (COMMAND.COM) and operating-system utility programs (such as EDLIN), treat a Control-Z in a text file as marking the end of

Wiki Search Tutorials/Articles Search HCL Search Reviews Search ISOs Go to Page... LinuxQuestions.org > Forums > Non-*NIX Forums > Programming how to print EOF in C programming?? User Name Remember Me? Password Programming This forum is for all programming questions. The question does not have to be directly related to Linux and any language is fair game. Notices Welcome to LinuxQuestions.org, a friendly and active Linux Community. You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today! Note that registered members see fewer ads, and ContentLink is completely disabled once you log in. Are you new to LinuxQuestions.org? Visit the following links: Site Howto | Site FAQ | Sitemap | Register Now If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here. Having a problem logging in? Please visit this page to clear all LQ-related cookies. Introduction to Linux - A Hands on Guide This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter. For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own. Click Here to receive this Complete Guide absolutely free. Search this Thread 11-27-2012, 12:18 AM #1 batman4 Member Registered: Jul 2012 Posts: 47 Rep: how to print EOF in C programming?? Here is a program i have found to print the eof .but when it is compiled , its showing following errors: In function âmainâ: eof.c:5: warning: incompatible implicit declaration of built-in function âprintfâ eof.c:6: error: âEOFâ undeclared (first use in this function) eof.c:6: error: (Each undeclared identifier is reported only once eof.c:6: error: for each function it appears in.) Code: #inlude int main(void) { printf("Pre