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

int is_all_alpha(char *str){
    char *s = str;
    while (isalpha(*s)){
        s++;
    }
    if (*s == '\n') {
        return 1;
    }
    return 0;
}

char **podstr_split(char **s, int size_arr){
    int n = 0;
    char **podstr_arr = malloc(sizeof(char*) * 5);
    char **ps = podstr_arr;
    for(char **str = s; str < s + size_arr; str++){
        if (is_all_alpha(*str)){
            *ps = malloc(sizeof(char) * (strlen(*str) + 1));
            strcpy(*ps, *str);
            ps++;
            n++;
            if (n % 5 == 0) {
                podstr_arr = realloc(podstr_arr, sizeof(char*) * (n + 5));
                ps = podstr_arr + n;
            }
        }
    }
    *(podstr_arr + n) = NULL;
    return podstr_arr;
}

void zam_symbol(char *s, char old, char h){
    char *p = s;
    while((p = strchr(p, old))){
        *p = h;
        p++;
    }
}

int find_sub(char *str, char fs){
    if (strchr(str, fs)) {
        return 1;
    }
    return 0;
}


int main(int argc, const char * argv[]) {
    FILE *f;
    char buf[80], **p = NULL, **str = NULL, **s, **podstr;
    int n = 0;
    if (!(f = fopen("data.txt", "rb"))) {
        printf("file don't exist");
        return 1;
    }
    else{
        while (!feof(f)) {
            str = (char**)malloc(sizeof(char*) * 5);
            p = str;
            while (!feof(f)) {
                fgets(buf, 79, f);
                *p = (char*)malloc((strlen(buf) + 1) * sizeof(char));
                strcpy(*p, buf);
                p++;
                n++;
                if (n % 5 == 0) {
                    str = (char**)realloc(str, sizeof(char*) * (n + 5));
                    p = str + n;
                }
            }
        }
    }
    podstr = podstr_split(str, n);
    for(s = str; s < str + n; s++){
        zam_symbol(*s, '*', '#');
        puts(*s);
        free(*s);
    }
    printf("\n__________________________________\n\n");
    for(s = podstr; *s; s++){
        if(find_sub(*s, 'x'))
            puts(*s);
        free(*s);
    }
    free(podstr);
    free(str);
    fclose(f);
    printf("\n");
}