Thread: Lopping through flat files

Code:

#include <stdio.h>
#define MAXLEN 200

int main()
{
     FILE *in, *out;
     char InLine[MAXLEN], OutLine[MAXLEN];
     char *s1, *s2;

     if(in = fopen("infile.txt", "r")) 
     {
          if(out = fopen("outfile.txt", "w"))
          {
               while(fgets(InLine, MAXLEN, in))
               {
                    s1 = InLine; s2 = OutLine;
                    while(*s1)
                    {
                         *(s2++) = *(s1++);
                         if(*(s1-1) == ' ')
                         {
                              *(s2++) = ',';
                              *(s2++) = ' ';
                         }
                    }
                    *s2 = 0;
                    fputs(OutLine, out);
               }
               fclose(out);
          }
          fclose(in);
     }
     return 0;
}

Maybe something like this? Here are the contents of my "file.txt":

Code:

this , is , an , example
this,is,another,example
and , this,is, also an, example ,
this isn't, (just kidding!)

The code:

Code:

#include <stdio.h>

int main(void)
{
   const char filename[] = "file.txt";
   FILE *file = fopen(filename, "r");
   if(file != NULL)
   {
      char buffer[BUFSIZ], fmt[32];
      int i = 0;
      sprintf(fmt, "%%%lu[^,]%%*c", (long unsigned)sizeof(buffer));
      while(fscanf(file, fmt, buffer) == 1)
      {
         printf("%3d \"%s\"\n", i++, buffer);
      }
      fclose(file); /* [edit]I missed this, CodeMaster gets the credit[/edit] */
   }
   return 0;
}

My output:

Code:

  0 "this "
  1 " is "
  2 " an "
  3 " example
this"
  4 "is"
  5 "another"
  6 "example
and "
  7 " this"
  8 "is"
  9 " also an"
 10 " example "
 11 "
this isn't"
 12 " (just kidding!)
"

Note the newlines that remain in the output because the comma is the only delimiter.