Датотека - Зборови палиндроими

#include <stdio.h>
#include <ctype.h>

void writeToFile() {
    FILE *f = fopen("text.txt", "w");
    char c;
    while((c = getchar()) != '#') {
        fputc(c, f);
    }
    fclose(f);
}

void printFile() {
    FILE *f=fopen("print.txt","r");
    char line[100];
    while(!feof(f)){
        fgets(line,100,f);
        if (feof(f))
            break;
        printf("%s",line);
    }
    fclose(f);
}

int main() {
    writeToFile();

    FILE *dat = fopen("text.txt", "r");
    FILE *dat1 = fopen("print.txt", "w");
    char c;
    char zbor[50];
    int i = 0;

    while (( c = fgetc ( dat )) != EOF ) {
        //ako zborot sodrzi bukvi ili cifri se koristi isalnum, ako sodrzi samo cifri se koristi isdigit, a ako ima samo bukvi togas isalpha
        if ( isalnum (c )) {
            zbor[i] = c;
            i++;
        } //vo else-ot zborot zavrsuva
        else {

            zbor[i] = '\0';

            //proveruvame dali zborot e palindrom
            if( i > 0){
                int k;
                int flag = 1;
                for(k=0; k<i/2; k++){
                   if(tolower(zbor[k]) != tolower(zbor[i-k-1])){
                        flag = 0;
                        break;
                    }
                }

                if(flag == 1){
                    fprintf(dat1, "%s\n", zbor);
                }
            }

            i=0;

        }

    }

    fclose(dat);
    fclose(dat1);
    printFile();
    return 0;
}