Generate Word size

#define LOCALE_GR   "greek"

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

int main (void)
{
    FILE *fp;
    FILE *fp1;
    char words[30];
    char *str;
    int counter;

    char oldlocale[100+1]={0};
    strncpy( oldlocale, setlocale(LC_ALL, NULL), 100 );

    char *cp = setlocale(LC_ALL, LOCALE_GR);
    if ( !cp )
        puts("could not change locale");
    else
        printf("Locale changed to: %s\n", cp);

    fp  = fopen("wordsgr.txt","r");
    fp1 = fopen("wordssize.txt","w");

/* will open wordsgr.txt read each line and store the"how many chacters are per line" in a file called wordsize*/
    while(1)
    {
        str = fgets(words,30,fp);

        if (str == NULL)
        {
            break;
        }

         counter = 0;

         for (int i = 0; words[i] != '\n'; i++)
        {
            counter++;
        }
        printf("%s",words);
        printf("%10.3d\n",counter);
        fprintf(fp1,"%d\n",counter);

            if ( cp )
        setlocale(LC_ALL, oldlocale);


    }
printf("\a");

    fclose(fp);
    fclose(fp1);
    return 0;
}