Thread: Using a function to print to a file

I just started out with C programming. I've read a few basic tutorials.OK, so I nabbed some code from this very website which prints a file.

Code:

void printfile() {     int c;     FILE *file;     file = fopen("text/README.txt", "r");     if (file) {	  while ((c = getc(file)) != EOF)	       putchar(c);	  fclose(file);     }     printf("\n");}

I put this in a function called "void printfile()".I want two things from this thread. Firstly, I wanna know what this function does step-by-step. Secondly, how do I make it so that every time I call this function, I could pick which file it prints?

About the formatting, it's actually formatted right in my editor. Not sure what's wrong with the forum post.I definitely will read these. But until I'm done with them, what does writing main(void) instead of main() do?

Originally Posted by yabobay

About the formatting, it's actually formatted right in my editor. Not sure what's wrong with the forum post.

You might be copying from an IDE. Make sure you are using plain text, not with IDE formatting.

Originally Posted by yabobay

But until I'm done with them, what does writing main(void) instead of main() do?

For main(), the two are effectively equivalent. For all other functions you create, there is a difference. You need to study the language to fully understand.

If your main(), or any other function, does not use any formal parameters to the function, always use "void". In other words, use int main(void), rather than int main().