Show results of fgetc as character on screen

Question

Hi,

I am trying to debug the following code:

int check_file(FILE* file)
{
  int c;
  int nl = '\n';

  while((c = fgetc(file)) != EOF)
  {
      if (c == nl) return 0;
  }

  printf("\n ERROR EOF \n");
  return 1;

}

when it gets error and returns 1, I would like to know the reason.

I thought about printing on screen the character read in the variable "c", before I get the error (so I can understand in which part of the read file is the error located) but this is an integer.

Is it possible somehow to print in on screen as character?

Thanks

Answer 1

printf("%c\n", c);

Answer 2

You don't know you are getting an error. Most likely, you are just reaching the end of the file. You should call feof() or ferror() to determine why fgetc() is returning no more data.

Answer 3

Your loop is terminating on End Of File (EOF), and, while you can print the character read before it, that generally won't help you. If you want to do something different at EOF, do that. In other words: if EOF is an error, then "in which part of the file" is always at the end.

To get a character from an integer, use (char)some_int, and to output a character, use [f]putc or printf("%c", some_int).

Answer 4

putc and fputc both take an integer argument.