This shows you the differences between two versions of the page.
c:stdio.h:feof [2013/01/22 22:02] |
c:stdio.h:feof [2024/02/16 01:05] (current) |
||
---|---|---|---|
Line 1: | Line 1: | ||
+ | {{keywords>wiki library source code example reference}} | ||
+ | ====== feof ====== | ||
+ | |||
+ | <code c> | ||
+ | int feof(FILE *stream); | ||
+ | </code> | ||
+ | checks that are applied to a stream or data or the end-of-file indicator is set.\\ | ||
+ | Used to determine if the end of the file (stream) specified, has been reached. When a file is being read sequentially one line, or one piece of data at a time (by means of a loop, say), this is the function you check every iteration, to see if the end of the file has come.\\ | ||
+ | Returns non-zero if end-of-file indicator is set for stream stream. | ||
+ | ===== C Sourcecode Example ===== | ||
+ | <code c> | ||
+ | /* | ||
+ | * feof example code | ||
+ | * http://code-reference.com/c/stdio.h/feof | ||
+ | */ | ||
+ | #include <stdio.h> /* including standard library */ | ||
+ | //#include <windows.h> /* uncomment this for Windows */ | ||
+ | |||
+ | #define MAX 1000 | ||
+ | |||
+ | int main( void ) | ||
+ | { | ||
+ | char buffer[MAX]; | ||
+ | FILE *filestream; | ||
+ | filestream = fopen("test.txt","r"); | ||
+ | |||
+ | while (feof(filestream) == 0) | ||
+ | { | ||
+ | fgets(buffer, MAX, filestream); | ||
+ | if (buffer[0] == '#') { | ||
+ | continue; | ||
+ | } | ||
+ | else { | ||
+ | printf("%s",buffer); | ||
+ | } | ||
+ | buffer[0]='\0'; | ||
+ | } | ||
+ | fclose(filestream); | ||
+ | return 0; | ||
+ | } | ||
+ | |||
+ | </code> | ||
+ | |||
+ | content of **test.txt** | ||
+ | <code c> | ||
+ | Line 1 | ||
+ | #Line 2 | ||
+ | Line 3 | ||
+ | #Line 4 | ||
+ | Line 5 | ||
+ | </code> | ||
+ | |||
+ | ==== feof output ==== | ||
+ | |||
+ | user@host:~$ ./feof | ||
+ | Line 1 | ||
+ | Line 3 | ||
+ | Line 5 | ||
+ | |||
+ | ==== See also ==== | ||
+ | [[c:stdio.h:clearerr|clearerr()]] [[c:stdio.h:ferror|ferror()]] [[c:stdio.h:perror|perror()]] [[c:stdio.h:putc|putc()]] [[c:stdio.h:getc|getc()]] | ||
+ | |||