parameters in c

  • The function ungetc () in C

    The function ungetc () in C

     the function int ungetc (int char, file * stream) in the c library standard pushes the char character (an unsigned char) onto the stream given to the next character to be read.
  • The function perror () in C

    The function perror () in C

     the function void perror (const char * str) in the c library standard prints a message describing the error to stderr. first, the printed string str is followed by a colon and then a space.
  • Calloc () function in C

    Calloc () function in C

     the function void * calloc (so-phan-tu, kich-co-phan-tu) allocates the requested memory and returns a pointer to it. the difference between malloc and calloc is: malloc does not set memory to 0 while calloc sets the allocated memory to 0.
  • Free () function in C

    Free () function in C

     the void free function (void * ptr) frees the previously allocated memory by a call to calloc, malloc, or realloc
  • The function atexit () in C

    The function atexit () in C

     int atexit function (void (* func) (void)) calls function func when the program ends. you can register your end function (func function) wherever you like, but this function will be called at the end of the program.
  • The exit () function in C

    The exit () function in C

     the void exit (int status) function immediately terminates the calling process. any file opened by the process is closed and any child process is inherited by the initial process and the parent process is sent a sigchild signal.
  • Function tmpfile () in C

    Function tmpfile () in C

     function file * tmpfile (void) in standard c library create temporary files in wb + mode. the temporary file created will be automatically deleted when the stream is closed (fclose function) or when the program ends.
  • Function tmpnam () in C

    Function tmpnam () in C

     the function char * tmpnam (char * str) in the c library standard creates and returns a valid temporary file name (temp file) that did not exist before creation. if str is null, it returns the tmp file name.
  • Function fprintf () in C

    Function fprintf () in C

     the int fprintf function (file * stream, const char * format, ...) in standard c library sends formatted output to a stream.
  • The function gets () in C

    The function gets () in C

     the char * gets (char * str) function in standard c library reads a line from stdin and stores it inside the string pointed by str. it stops when the end-of-file or newline character is encountered (new line) is read.
  • Function vfprintf () in C

    Function vfprintf () in C

     the int vfprintf function (file * stream, const char * format, va_list arg) in the standard c library sends the formatted output to a stream using a parameter list.
  • The function vsprintf () in C

    The function vsprintf () in C

     the function int vsprintf (char * str, const char * format, va_list arg) in the standard c library sends the formatted output to a string string using a parameter list.