Search DaniWeb - fflush

Re: fflush 14 Years Ago by Ancient Dragon fflush(stdin) is non-standard and not supported by many compilers. fflush is used to force the operating system to write everything to the output stream. Since stdin is an input stream and not an output stream fflush(stdin) may or may not work, depending on what comiler you use. Re: fflush() 12 Years Ago by deceptikon … Borland and Microsoft compilers). In terms of best practice, fflush() on an input stream is frowned upon. However, note…is incomplete when compared with what people expect from `fflush(stdin)` because it blocks for input when the …stream is empty. fflush(), when flushing input streams is supported, will return without… fflush 13 Years Ago by Leaningnew what does fflush do?? what fflush(stdin)means?? Re: fflush 13 Years Ago by Narue … chooses it to mean. The C standard says that calling fflush() with an input stream is undefined. However, many implementations choose… Re: fflush 13 Years Ago by sergent It flushes the input buffer i.e. writes everything to the output stream. Some systems don't write all the input buffer contents to the screen until newline character is encountered so to write everything to the screen fflush() can be used. Re: fflush() 12 Years Ago by ravenous … like this: std::cout << "Doing something... "; fflush( std::cout ); /* Some code that takes some time to do…; << std::endl; If you don't have the `fflush()` part, then the whole message can appear in one go… Re: fflush() 12 Years Ago by ravenous > Yeah, that won't work. fflush() expects a pointer to FILE, not an std::ostream object. … synchronizing with the destination device. Sorry, I meant to do: fflush( stdout ); Which does what I wanted it to do :) (I… fflush 14 Years Ago by harikrishna439 What is fflush(stdin)?What are the uses and application of it? fflush() 12 Years Ago by np complete I use this function quite a lot. Recently one of my friend told me it is not good to use fflush(). I googled it, and found that it gives some kind of unexpected behaviour. My question is when does this function works improperly and why? Nowadays I use scanf("[^\n]") to flush input stream. Is this ok? Re: what is fflush? 20 Years Ago by Chainsaw fflush() is one of the standard C routines for file manipulation. … an internal buffer in order to speed up successive writes. fflush() writes the buffer to disk if it has unwritten data… Re: What does fflush do exactly? 15 Years Ago by Narue …examples: [code] /* Example 1 */ printf("Prompt: "); fflush(stdout); gets(s); [/code] [code] /* Example 2 */ …, the overhead is present, and when calling fflush explicitly the overhead isn't increased by more…simply discarded. [/quote] This is completely ridiculous. fflush operates on output streams, and flushing an output stream… Re: What does fflush do exactly? 15 Years Ago by Ancient Dragon … writing to the screen (MS-Windows) I never use fflush() because MS-Windows seems to write immediately. I have seen… it after every printf() statement, you can delay callinf fflush() until after all printf() statements but before any input … writing has been done. Its not necessary to call fflush() before the file is closed because fclose() will do… What does fflush do exactly? 15 Years Ago by urbangeek …[url]http://www.thinkage.ca/english/gcos/expl/c/lib/fflush.html[/url] in the above link they are saying, …]printf("Prompt: "); fflush(stdout); gets(s);[/CODE] but before we used fflush after printf...for example [URL="…;]here[/URL] jephthah gave a solution where he used fflush after printf and mentioned [ICODE]// printf did not have… Re: What does fflush do exactly? 15 Years Ago by jephthah …quot;http://www.thinkage.ca/english/gcos/expl/c/lib/fflush.html"] link [/URL]they are saying, user …should definitely NOT [use fflush(stdout) to clear the output buffer.] [/quote] that webpage…;]here[/URL] jephthah gave a solution where he used fflush after printf and mentioned [ICODE]// printf did not have… Re: What does fflush do exactly? 13 Years Ago by Narue … a newline is printed, the buffer is flushed [*]If fflush() is called, the buffer is flushed [/list] This is…] [*]If the buffer is full, it's flushed [*]If fflush() is called, the buffer is flushed [/list] The only …practice after redirection to a non-interactive stream is calling fflush() explicitly, or setting the buffer manually to either … Re: What does fflush do exactly? 13 Years Ago by Javier Ruiz … this code: [code=c]printf("Filling array...\n"); //fflush(stdout); fill_array(a, len, max); printf("Array filled.\n…"); //fflush(stdout); print_sorted(array_sorted(a,len);[/code] the first printf is… Doing fsync() or fflush() on a ACE_HANDLE. 16 Years Ago by GDICommander … disk. So I want to use a fsync() or a fflush() function. I'm working with ACE_HANDLEs. Unfortunately, my searches concluded… with this: only fflush() exists in ACE_OS and it takes a FILE* pointer as… Re: flush or fflush 17 Years Ago by Ancient Dragon Neither flush() nor fflush() are used on input streams. [URL="http://www.daniweb.…() is used by c++ streams in <fstream> and fflush() is used by C streams declared in <stdio.h… what is fflush? 20 Years Ago by {{unknown}} HI I JUST START TO LREAN ABOUT C LANGAUAE AND I DONE SOME PROGRAME BY C LANGAUE.... I WOULD LIKE TO KNOW ABOUT fflush WHAT IS THIS FUNCTION STAND FOR? AND WHEN WE USE IT? Re: what is fflush? 20 Years Ago by {{unknown}} hmm...) thanks aloooooooooooooot:) now i get it..:) i'll try to do aprograme using fflush function.......:) and..i'll show u when i'll finesh.. thansk again...fpr infromation.. flush or fflush 17 Years Ago by rje7 dear all, wat should i do to clear the input buffer stream? and also make me clear regarding flush and fflush. both do the same functions? Re: What does fflush do exactly? 15 Years Ago by WaltP When you write to 'buffered' device, sometimes the system will hold the characters in the buffer until a specific thing happens: 1) the buffer is filled 2) a NEWLINE \n is added 3) an explicit command (flush) is used It all depends on how the compiler I/O is designed. So on some compilers, a printf() or cout command may not work immediately. … Re: What does fflush do exactly? 15 Years Ago by urbangeek thanks waltP and dragon for explaining. thanks narue, all the question was arising in my mind after waltp and dragon's replies were answered in your post. That explained all the things. [QUOTE=jephthah;1184338]i'm only commenting here because my name was dropped :icon_wink:[/QUOTE] well mate, if anyone is there whom i trust blindly, it's you(i … Re: What does fflush do exactly? 15 Years Ago by jephthah [QUOTE]if anyone is there whom i trust blindly, it's you[/QUOTE] um, please don't do that... :P [quote]trained by some of best programmers in the globe in this language[/quote] the sentiment is appreciated, but far from reality. Narue is probably the closest this forum has to a guru. the rest of are still in various stages of … Re: Doing fsync() or fflush() on a ACE_HANDLE. 16 Years Ago by GDICommander It's ok. I have found ACE_OS::fsync() that takes an handle as a parameter. Re: flush or fflush 17 Years Ago by rje7 i would also like to know how to implement it... Re: flush or fflush 17 Years Ago by Ancient Dragon Read the link I posted Re: flush or fflush 17 Years Ago by rje7 than you guys.. Re: fread/fwrite 16 Years Ago by Ancient Dragon >>fflush(stdin); fflush is not defined for input streams, only output, so the … Re: Linked Lists in C 17 Years Ago by Ancient Dragon >>fflush (0); That is non-standard, should be [inlinecode]fflush (stdout);[/inlinecode]. Any attempt to use fflush() on an input stream like stdin will result in undefined/unpredictable behavior.