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Why would a password requirement prohibit a number in the last character? Reaching the end of the string in sscanf() is equivalent to encountering end-of-file for fscanf(). Then, the stream is rewinded and both values are read with fscanf. I dont know how to fix this.

Error using ==> fscanf The file identifier must be of class double. A dash (-) that is not the first character may produce non-portable behavior in some library implementations. [^characters]Negated scansetAny number of characters none of them specified as characters between the brackets. Your second call to fscanf returns 4 because all 4 arguments were matched. The conversion characters E, G and X are also valid and behave the same as, respectively, e, g and x.

Per http://pubs.opengroup.org/onlinepubs/007904975/functions/scanf.html: Upon successful completion, these functions shall return the number of successfully matched and assigned input items; this number can be zero in the event of an early matching failure. Marc Reclaire, Dec 18, 2003, in forum: C++ Replies: 2 Views: 566 Karl Heinz Buchegger Dec 18, 2003 getting return value from function without return statement. Much appreciated! and got to check the return value of fopen as well.

pMatches an implementation-dependent set of sequences, which must be the same as the set of sequences that is produced by the %p conversion of the corresponding fprintf() functions. Browse other questions tagged c file-io error-handling fscanf or ask your own question. If the input ends before the first matching failure or conversion, EOF shall be returned. Download now × About Newsgroups, Newsreaders, and MATLAB Central What are newsgroups?

Your name or email address: Do you already have an account? Where are sudo's insults stored? Higher level in brake fluid tank after pad replacement With modern technology, is it possible to permanently stay in sunlight, without going into space? And, if either happens before any data could be successfully read, EOF is returned.

When numbered argument specifications are used, specifying the Nth argument requires that all the leading arguments, from the first to the ( N-1)th, are pointers. [CX] The fscanf() function in all lengthOne of hh, h, l, ll, j, z, t, L (optional). The next byte is read from the input and compared with the byte that comprises the directive; if the comparison shows that they are not equivalent, the directive fails, and the Example 1
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/* fscanf example */ #include int main () { char str [80]; float f; FILE * pFile; pFile = fopen ("myfile.txt","w+"); fprintf (pFile, "%f %s", 3.1416, "PI"); rewind

The following sections are informative. hope this helps. It means "read in no more than 5 non-whitespace characters". A directive composed of one or more white-space characters shall be executed by reading input until no more valid input can be read, or up to the first byte which is

If the conversion specification includes an assignment-suppressing character or a field width, the behavior is undefined. Sign Up Now! The corresponding argument must be a pointer to an array of wchar_t large enough to accept the resulting sequence of wide-characters. sString of charactersAny number of non-whitespace characters, stopping at the first whitespace character found.

share|improve this answer answered Mar 10 '13 at 3:22 n13 2,5241513 add a comment| Not the answer you're looking for? Toggle Main Navigation Log In Products Solutions Academia Support Community Events Contact Us How To Buy Contact Us How To Buy Log In Products Solutions Academia Support Community Events Search Newsgroup Each character in the sequence shall be converted to a wide character as if by a call to the mbrtowc() function, with the conversion state described by an mbstate_t object initialized dwk Seek and ye shall find.

However, my output is: >> --------------------------------------- les 1 >> --------------------------------------- >> >> My actual motive: when I am using fscanf() to read a file with the >> format sequence "%[^c]" where Good Term For "Mild" Error (Software) more hot questions question feed lang-c about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Why is water evaporated from the ocean not salty? thanx.

No single entity “owns” the newsgroups. Any trailing white space (including newline characters) is left unread unless matched by a conversion specification. Forum Today's Posts C and C++ FAQ Forum Actions Mark Forums Read Quick Links View Forum Leaders What's New? quaere et invenies. "Simplicity does not precede complexity, but follows it." -- Alan Perlis "Testing can only prove the presence of bugs, not their absence." -- Edsger Dijkstra "The only real

Each character shall be converted to a wide character as if by a call to the mbrtowc() function, with the conversion state described by an mbstate_t object initialized to zero before i Matches an optionally signed integer, whose format is the same as expected for the subject sequence of strtol() with 0 for the base argument. Why are unsigned numbers implemented? How do I read or post to the newsgroups?

Did Sputnik 1 have attitude control? Execution of a %n conversion specification shall not increment the assignment count returned at the completion of execution of the function. nNo input is consumed. Cross, Jun 24, 2009 #7 Advertisements Show Ignored Content Want to reply to this thread or ask your own question?

Please explain. "Number of successful conversions" := "number of %'s that have been successfully matched" (and assignments made) So it is *not* the number of _characters_, but the number of "items" Does chilli get milder with cooking? In the absence of a size modifier, the corresponding argument must be a pointer to int. About Us The Coding Forums is a place to seek help and ask questions relating to coding and programming languages.

Why are unsigned numbers implemented? Apr 26 '11 at 18:44 Oops, I meant the first line of the second paragraph... –Patrick Apr 26 '11 at 18:46 So can fscanf return EOF without Regards, Cross Cross, Jun 21, 2009 #1 Advertisements Cross Guest Cross wrote: > Hello > > I am using the following code to check fscanf() error value. > ---------------------------------- > Discussions are threaded, or grouped in a way that allows you to read a posted message and all of its replies in chronological order.

Coming from C programming, you only mixed up fscanf and fprintf! If a length modifier appears with any conversion specifier other than as specified above, the behavior is undefined. You are limiting your code to take the size of 1K, you should never use hardcoding of values, and what will you do if you string size goes beyond 1K (extreme Member Login Remember Me Forgot your password?

If conversion terminates on a conflicting input, the offending input is left unread in the input. An optional non-zero decimal integer that specifies the maximum field width. A conversion specification is executed in the following steps: Input white-space characters (as specified by isspace()) are skipped, unless the conversion specification includes a [, c, C or n conversion character. If this object does not have an appropriate type, or if the result of the conversion cannot be represented in the space provided, the behaviour is undefined.

Feed for this Thread Add to My Watch List What is a Watch List? × What is a watch list? The call: int i; float x; char name[50]; (void) scanf("%2d%f%*d %[0123456789]", &i, &x, name); with input: 56789 0123 56a72 will assign 56 to i, 789.0 to x, skip 0123, and place