Thread: reading and writing files

I'm trying to do some basic file io in C. For my first attempt I'm just trying to print out the contents of a file (unsuccessfully)

Here's my code:

Code:

   FILE *readfile = fopen("./www/index.html","w+");
   char c;
   while((c=getc(readfile)!=EOF))
      printf("%c",c);
   fclose(readfile);

But nothing gets printed.

I was reading this:
Notes on C: File I/O

I've learned that this code manages to just erase my file

Sounds about right. Try opening your file in the correct "mode".

fopen - C++ Reference

Yep, just figured that out. I used r+ this time but it doesn't print any of the characters. It prints out just blank spaces it seems like.

For getc():
The character read is returned as an int value.

I was curious to see what integers got printed out, but it only prints 1's.

Code:

	
        FILE *readfile = fopen("./www/index.html", "r+");
	int i;
	while((i=getc(readfile)!=EOF))
		printf("%d ",i);
	fclose(readfile);

I didn't mean that. Just a tip, spread your code out a little bit. No need to jam it all in.

Code:

#include <stdio.h>

int main (void)
{
	FILE *readfile = fopen("./www/index.html","r+");
	int c = getc(readfile);

	while(c != EOF)
	{
		printf("%c", c);
		c = getc(readfile);
	}
      
	fclose(readfile);
	return 0;
}

Thats better thanks!

It also would be wise to check the result of fopen(), just in case it has failed.