ita_ingl

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

#define FILE_INPUT   "fin.txt"
#define FILE_OUTPUT  "fout.txt"

#define STRLEN       256

typedef FILE*        pfile;
typedef char*        pchar;

int main(void)
  {
    char   s[STRLEN];
    pchar  p1;
    pfile  pfin, pfout;

    if((pfin=fopen  (FILE_INPUT, "r"))==NULL)    goto fopen_err;
    if((pfout=fopen(FILE_OUTPUT, "w"))==NULL)    goto fopen_err;

    do
      {
        fscanf(pfin, "%s",s);
        for(p1=s; *p1!=','; p1++);
        *p1='.';
        fprintf(pfout,"%s\n",s);

      }
    while ((strcmp(s,"NULL")!=0));

    fclose  (pfin);
    fclose  (pfout);
    return EXIT_SUCCESS;

    fopen_err:
      {
        printf("c'è un problema nell'apertura del file.\n");
        return EXIT_FAILURE;
      }

  }