https://code-reference.com/ 2026-05-18T13:44:46+02:00 https://code-reference.com/ https://code-reference.com/ttps://code-reference.com/lib/tpl/dokuwiki/images/favicon.ico text/html 2024-02-16T01:05:44+02:00 https://code-reference.com/c/stdio.h/bufsiz?rev=1708041944&do=diff type Macro #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ BUFSIZ The value for BUFSIZ should normally be 256 KB, 512 KB or 4096 KB. This depends on the system and the compiler. BUFSIZ C Sourcecode Example /* * BUFSIZ example code * http://code-reference.com/c/stdio.h/bufsiz */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main (void) { printf ("The m… text/html 2024-02-16T01:05:44+02:00 https://code-reference.com/c/stdio.h/clearerr?rev=1708041944&do=diff clearerr void clearerr(FILE *stream); Description The clearerr function resets the error flags and EOF indicator for the given stream. When an error occurs, you can use |perror()| to figure out which error actually occurred. clearerr C Sourcecode Example /* * clearerr example code * http://code-reference.com/c/stdio.h/clearerr */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *handle; ha… text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/fclose?rev=1708041942&do=diff fclose #include <stdio.h> /* including standard library */ int fclose( FILE *stream ); Description Close the current stream / file Used to close the specified file (stream). You should always use this function, to clean up after using a file. Any data that has been written to the file, but not actually made it that far yet, i.e. which has only been written to the file buffer in memory, will then be actually written to the physical file itself by the operating system. The space i… text/html 2013-02-25T14:50:30+02:00 https://code-reference.com/c/stdio.h/fdopen?rev=1361800230&do=diff #include <stdio.h> /* including standard library */ FILE *fdopen(int fildes, const char *mode); description of fdopen fdopen() is the counterpart to fileno(). As a mode, such as the file is opened, the same modes as the can open() can be used. fdopen() is often applied to file descriptors that are returned from functions that set up the pipes or channels of communication in networks. This is because some functions like open(), dup(), dup2(), fcntl(), pipe(), ... in networks can not do anythi… text/html 2024-02-16T01:05:40+02:00 https://code-reference.com/c/stdio.h/feof?rev=1708041940&do=diff int feof(FILE *stream); 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. text/html 2013-07-26T11:32:21+02:00 https://code-reference.com/c/stdio.h/ferror?rev=1374831141&do=diff ferror int ferror(FILE *stream); the function ferror tests the error indicator for the stream pointed to by stream, returning non-zero if it is set. The error indicator can only be reset by the clearerr function. Returns non-zero if error indicator is set for stream stream. text/html 2024-02-16T01:05:40+02:00 https://code-reference.com/c/stdio.h/fflush?rev=1708041940&do=diff fflush int fflush(FILE *stream); Flushes stream stream and returns zero on success or EOF on error. Effect undefined for input stream. fflush(NULL) flushes all output streams. C Sourcecode Example /* * fflush example code * http://code-reference.com/c/stdio.h/fflush */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #define MAX 80 int main( void ) { FILE *filestream = fopen("test.txt", "rt+"); char buffer[MAX]; i… text/html 2014-12-04T13:27:53+02:00 https://code-reference.com/c/stdio.h/fgetc?rev=1417696073&do=diff fgetc int fgetc ( FILE * stream ); Returns next character from (input) stream stream, or EOF on end-of-file or error. C Sourcecode Example /* * fgetc example code * http://code-reference.com/c/stdio.h/fgetc */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *stream; char c; if((stream=fopen("test.txt","r"))==NULL) { printf("Cannot open file.\n"); return 1; } while((c = fget… text/html 2013-02-17T03:59:12+02:00 https://code-reference.com/c/stdio.h/fgetpos?rev=1361069952&do=diff int fgetpos(FILE *stream, fpos_t *pos); Stores current file position for stream stream in *pos. Returns non-zero on error. Description The fgetpos() function stores the file position indicator of the given file stream in the given position variable. The position variable is of type fpos_t (which is defined in stdio.h) and is an object that can hold every possible position in a FILE. fgetpos() returns zero upon success, and a non-zero value upon failure. text/html 2024-02-16T01:05:40+02:00 https://code-reference.com/c/stdio.h/fgets?rev=1708041940&do=diff fgets char *fgets(char *str, int n, FILE *stream); Copies characters from (input) stream stream to sstr, stopping when n-1 characters copied, newline copied, end-of-file reached or error occurs. If no error, str is NUL-terminated. Returns NULL on end-of-file or error, str otherwise. text/html 2024-02-16T01:05:40+02:00 https://code-reference.com/c/stdio.h/file?rev=1708041940&do=diff FILE FILE Pointer (stream) shows on a given file // here is a better explanation necessary C Sourcecode Example #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main ( void ) { FILE *filestream; filestream=fopen("test.txt","r"); if (filestream == 0) { perror("cannot open file"); } fclose(filestream); return 0; } text/html 2015-05-04T11:13:43+02:00 https://code-reference.com/c/stdio.h/fopen?rev=1430730823&do=diff #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ FILE * fopen (const char * restrict path, const char * restrict mode) Opens file named restrict path and returns a stream, or NULL on failure. mode may be one of the following for files or one of those strings with b included (after the first character), for binary files. text/html 2024-02-16T01:05:44+02:00 https://code-reference.com/c/stdio.h/fpos_t?rev=1708041944&do=diff Object containing information to specify a position within a file This type of object is used to specify a position within a file. An object of this type is capable of specifying uniquely the position within a file. text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/fprintf?rev=1708041941&do=diff int fprintf(FILE *stream, const char *format, ...); Converts (according to format format) and writes output to stream stream. Number of characters written, or negative value on error, is returned. optional flag: - left adjust + always sign 0 zero pad # Alternate form: for conversion character o, first digit will be zero, for [xX], prefix 0x or 0X to non-zero value, for [eEfgG], always decimal point, for [gG] trailing zeros not removed. optional minimum width: if specified as *… text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/fputc?rev=1708041941&do=diff fputc int fputc(int ch, FILE *stream); Writes ch, to stream stream. Returns ch, or EOF on error. C Sourcecode Example /* * fputc example code * http://code-reference.com/c/stdio.h/fputc */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *stream, *stream_target; char c; if((stream=fopen("test.txt","rb"))==NULL) { printf("Cannot open file.\n"); return 1; } if((stream_targ… text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/fputchar?rev=1708041943&do=diff int fputchar( int c ); description The fputchar() function writes the character specified by the argument c to the output stream stdout. This function is identical to the putchar() function. example #include <stdio.h> int main( void ) { FILE *fp; int c; fp = fopen( "file.txt", "r" ); if( fp != NULL ) { c = fgetc( fp ); while( c != EOF ) { fputchar( c ); c = fgetc( fp ); } fclose( fp ); } } text/html 2013-01-07T21:39:31+02:00 https://code-reference.com/c/stdio.h/fputs?rev=1357591171&do=diff int fputs(const char *str, FILE *stream); Writes str, to (output) stream stream. Returns non-negative on success or EOF on error. C Sourcecode Example /* * fputs example code * http://code-reference.com/c/stdio.h/fputs */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *stream; if((stream=fopen("test.txt","w"))==NULL) { printf("Cannot open file for writing.\n"); return 1; } … text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/fread?rev=1708041943&do=diff fread size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream); fread reads num number of objects from a stream (where each object is size bytes) and places them into the array pointed to by buffer. The return value of the function is the number of read data text/html 2024-02-16T01:05:45+02:00 https://code-reference.com/c/stdio.h/freopen?rev=1708041945&do=diff #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ FILE *freopen( const char *fname, const char *mode, FILE *stream ); closes file associated with stream, then opens file filename with specified mode and associates it with stream. Returns stream or NULL on error. text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/fscanf?rev=1708041942&do=diff fscanf int fscanf(FILE *stream, const char *format, ...); Performs formatted input conversion, reading from stream stream according to format format. The function returns when format is fully processed. Returns number of items converted and assigned, or EOF if end-of-file or error occurs before any conversion. Each of the arguments following format must be a pointer. Format string may contain: text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/fseek?rev=1708041941&do=diff int fseek(FILE *stream, long int offset, int origin); Sets file position for stream stream and clears end-of-file indicator. For a binary stream, file position is set to offset bytes from the position indicated by origin: beginning of file for SEEK_SET, current position for SEEK_CUR, or end of file for SEEK_END. Behaviour is similar for a text stream, but offset must be zero or, for SEEK_SET only, a value returned by ftell. Returns non-zero on error. text/html 2024-02-16T01:05:44+02:00 https://code-reference.com/c/stdio.h/fsetpos?rev=1708041944&do=diff int fsetpos(FILE *stream, const fpos_t *pos); reset the position indicator to using fsetpos() stores the current file position indicator to the location indicated by the information in pos Returns non-zero on error. C Sourcecode Example #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *stream; fpos_t file_pos; int c; int i; if((stream=fopen("test.txt","r"))==NULL) { printf("Ca… text/html 2024-02-16T01:05:40+02:00 https://code-reference.com/c/stdio.h/ftell?rev=1708041940&do=diff ftell long int ftell(FILE *stream); Returns current file position for stream stream, or -1 on error. C Sourcecode Example #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *stream; int c; if((stream=fopen("test.txt","r"))==NULL) { printf("Cannot open file.\n"); return 1; } while((c = fgetc(stream) ) != EOF) { printf("position of pointer in the stream i… text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/fwrite?rev=1708041942&do=diff size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream); The fwrite() function writes, from the array buffer, count objects of size size to stream. The return value is the number of objects written. C Sourcecode Example /* * fwrite example code * http://code-reference.com/c/stdio.h/fwrite */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ struct CD_COLLECTION { char album_name[42]; int year; char arti… text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/getc?rev=1708041942&do=diff getc int getc(FILE *stream); Returns next character from (input) stream stream, or EOF on end-of-file or error. C Sourcecode Example /* * getc example code * http://code-reference.com/c/stdio.h/getc */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *stream; int c; if((stream=fopen("test.txt","r"))==NULL) { printf("Cannot open file.\n"); return 1; } whi… text/html 2015-01-30T21:01:41+02:00 https://code-reference.com/c/stdio.h/getchar?rev=1422648101&do=diff getchar #include <ctype.h> int getchar( void ); Get a character C Sourcecode Example /* * getchar example code * http://code-reference.com/c/stdio.h/getchar */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #include <ctype.h> int main ( void ) { int chars; printf("type in . to end your input : "); while ((chars = getchar()) != '.' ){ putchar(chars); } return 0; } text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/gets?rev=1708041941&do=diff gets char *gets(char *str); Copies characters from stdin into str until newline encountered, end-of-file reached, or error occurs. Does not copy newline. NUL-terminates s. Returns str, or NULL on end-of-file or error. Should not be used because of the potential for buffer overflow. text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/perror?rev=1708041943&do=diff void perror(const char *str); Prints str (if non-null) and strerror(errno) to standard error as would: fprintf(stderr, "%s: %s\n", (s != NULL ? s : ""), strerror(errno)) C Sourcecode Example /* * perror example code * http://code-reference.com/c/stdio.h/perror */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main ( void ) { FILE *stream; stream = fopen("test_not_exists.txt","r"); if (stream == 0) { perror("Here c… text/html 2014-08-21T18:09:48+02:00 https://code-reference.com/c/stdio.h/printf?rev=1408637388&do=diff printf #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int printf ( const char * restrict format, ... ); Arguments The function printf prints format to STDOUT Code Description %c character value %s string of characters %d signed integer %i signed integer %f floating point value %e scientific notation, with a lowercase “e” %E scientific notation, with a uppercase “E” %g use %e or %f %G use %E or %f %o octa… text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/putc?rev=1708041941&do=diff putc int putc(int char, FILE *stream); put char into a stream. C Sourcecode Example /* * putc example code * http://code-reference.com/c/stdio.h/putc */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { int c; FILE *stream, *destination; stream = fopen("test.txt", "r"); destination = fopen("test_copy.txt","w"); if (stream == 0 || destination == 0) { perror("cannot open stream"); … text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/putchar?rev=1708041943&do=diff putchar int putchar(int char); put a character into stdout C Sourcecode Example /* * putchar example code * http://code-reference.com/c/stdio.h/putchar */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { int c; c = 0; // ASCII Code a while (c < 255) { // count chars in a while loop putchar(c); c++; } putchar('\n'); return 0; } text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/puts?rev=1708041942&do=diff puts int puts(const char *str); Writes str (excluding terminating NUL) and a newline to stdout. Returns non-negative on success, EOF on error. Example Source /* * puts example code * http://code-reference.com/c/stdio.h/puts */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main ( void ) { char string [30] = "This is a test for puts!"; puts (string); return 0; } text/html 2024-02-16T01:05:44+02:00 https://code-reference.com/c/stdio.h/remove?rev=1708041944&do=diff int remove(const char *filename); Removes specified file. Returns non-zero on failure. Example Source /* * remove example code * http://code-reference.com/c/stdio.h/remove */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #define FILENAME "test_tmp.txt" int main ( void ) { FILE *tmpfile; char string[20]; tmpfile = fopen(FILENAME, "w"); if (tmpfile == 0 ) { perror("cannot open file"); } fprintf (tmpfile, "temporary file f… text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/rename?rev=1708041942&do=diff int rename(const char *old_filename, const char *new_filename); Changes name of file oldname to newname. Returns non-zero on failure. Example Source /* * rename example code * http://code-reference.com/c/stdio.h/rename */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #define FILENAME "test_tmp.txt" int main ( void ) { FILE *tmpfile; char string[20]; tmpfile = fopen(FILENAME, "w"); if (tmpfile == 0 ) { perror("cannot ope… text/html 2024-02-16T01:05:44+02:00 https://code-reference.com/c/stdio.h/rewind?rev=1708041944&do=diff rewind void rewind(FILE *stream); equal like fseek(stream, 0L, SEEK_SET); clearerr(stream); Resets the read pointer to the beginning of the File and clear the error indicator C Sourcecode Example /* * rewind example code * http://code-reference.com/c/stdio.h/rewind */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main (void) { FILE *stream; int c; long seek_position; seek_position = 21; stream=fopen("test.txt"… text/html 2014-05-17T23:11:03+02:00 https://code-reference.com/c/stdio.h/scanf?rev=1400361063&do=diff scanf int scanf(const char *format, ...); The function returns the number of items that were successfully read EOF if the input stream reached its end, or a negative number if an error occurs. C Sourcecode Example /* * scanf example code * http://code-reference.com/c/stdio.h/scanf */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main ( void ) { char input[20]; printf ("Enter some Text (max 20 chars) "); s… text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/setbuf?rev=1708041941&do=diff void setbuf(FILE *stream, char *buffer); Controls buffering for stream stream. For null buf, turns off buffering, otherwise equivalent to (void)setvbuf(stream, buf, _IOFBF, BUFSIZ). setbuf is deprecated use setvbuf instead C Sourcecode Example /* * setbuf example code * http://code-reference.com/c/stdio.h/setbuf */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main( void ) { FILE *stream = fopen("test.txt", "w"); … text/html 2024-02-16T01:05:44+02:00 https://code-reference.com/c/stdio.h/setvbuf?rev=1708041944&do=diff int setvbuf(FILE *stream, char *buffer, int mode, size_t size); Controls buffering for stream stream. mode is _IOFBF for full buffering, _IOLBF for line buffering, _IONBF for no buffering. Non-null buf specifies buffer of size size to be used; otherwise, a buffer is allocated. Returns non-zero on error. Call must be before any other operation on stream. text/html 2013-02-25T15:56:52+02:00 https://code-reference.com/c/stdio.h/snprintf?rev=1361804212&do=diff #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int snprintf(char *restrict s, size_t n, const char *restrict format, ...); description of snprintf The function snprintf() format the format specified by arguments of the printf format specification and writes the result to the specified string by dest. size specifies the maximum length of the string at least. The string in least receive in any case a terminating NULL character. In no… text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/sprintf?rev=1708041941&do=diff #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int sprintf(char *str, const char *format, ...); Like fprintf, but output written into string s, which must be large enough to hold the output, rather than to a stream. Output is NUL-terminated. Returns length (excluding the terminating NUL). text/html 2024-02-16T01:05:41+02:00 https://code-reference.com/c/stdio.h/sscanf?rev=1708041941&do=diff #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int sscanf(const char *str, const char *format, ...); sscanf reads formatted input text from the string addressed by source . No file input is performed. Following the format in the argument list may be one or more additional pointers addressing storage where the input values are stored. text/html 2024-02-16T01:05:40+02:00 https://code-reference.com/c/stdio.h/tmpfile?rev=1708041940&do=diff FILE *tmpfile(void); tmpfile Creates temporary file which will be removed when closed or on normal program termination. standard mode (mode “wb+”) Returns stream or NULL on failure. C Sourcecode Example /* * tmpfile example code * http://code-reference.com/c/stdio.h/tmpfile */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main ( void ) { FILE *stream = tmpfile(); char c; if( stream == NULL ) { perror("Er… text/html 2024-02-16T01:05:39+02:00 https://code-reference.com/c/stdio.h/tmpnam?rev=1708041939&do=diff tmpnam char *tmpnam(char *str); Assigns to s (if s non-null) and returns unique name for a temporary file. Unique name is returned for each of the first TMP_MAX invocations. C Sourcecode Example /* * tmpnam example code * http://code-reference.com/c/stdio.h/tmpnam */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int main ( void ) { FILE *tmpstream; char *tmpfile; tmpfile = tmpnam(NULL); tmpstream= fopen(tmpfile, "… text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/ungetc?rev=1708041943&do=diff ungetc #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ int ungetc(int chr, FILE *stream); Pushes chr (which must not be EOF), onto (input) stream stream such that it will be returned by the next read. Only one character of pushback is guaranteed (for each stream). Returns chr, or EOF on error. text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/vfprintf?rev=1708041943&do=diff int vfprintf(FILE *stream, const char *format, va_list arg); Equivalent to fprintf with variable argument list replaced by arg, which must have been initialised by the va_start macro (and may have been used in calls to va_arg). C Sourcecode Example /* * vfprintf example code * http://code-reference.com/c/stdio.h/vfprintf */ #include <stdio.h> /* including standard library */ //#include <windows.h> /* uncomment this for Windows */ #include <stdarg.h> int myfprintf( FILE *file, char c… text/html 2013-02-25T16:22:36+02:00 https://code-reference.com/c/stdio.h/vfscanf?rev=1361805756&do=diff int vfscanf ( FILE * stream, const char * format, va_list arg ); description of vfscanf The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to the scanf(), fscanf(), and sscanf() functions, respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined in the <stdarg.h> header. These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap after the return … text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/vprintf?rev=1708041943&do=diff int vprintf(const char *format, va_list arg); Equivalent to printf with variable argument list replaced by arg, which must have been initialised by the va_start macro (and may have been used in calls to va_arg). is used to generate a string from a format string and then print to standard output stdout. vprintf can understood as a combination of puts and vsprintf. text/html 2024-02-16T01:05:42+02:00 https://code-reference.com/c/stdio.h/vscanf?rev=1708041942&do=diff int vscanf(char * restrict format, va_list arg_ptr); description The functions vscanf(), vfscanf(), and vsscanf() are functionally equivalent to scanf(), fscanf(), and sscanf(), respectively, except that the argument list has been replaced by a pointer to a list of arguments. This pointer must be of type va_list, which is defined in the header . text/html 2024-02-16T01:05:43+02:00 https://code-reference.com/c/stdio.h/vsprintf?rev=1708041943&do=diff vsprintf int vsprintf(char *str, const char *format, va_list arg); generate a string from a format string. For this purpose, the buffer that is passed as first argument, the format string is copied and replaces the substitution symbol with the given parameters. text/html 2013-02-25T16:27:34+02:00 https://code-reference.com/c/stdio.h/vsscanf?rev=1361806054&do=diff int vsscanf(const char *restrict s, const char *restrict format, va_list arg); description of vsscanf The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to the scanf(), fscanf(), and sscanf() functions, respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined in the <stdarg.h> header. These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap aft…