eliminazioneParole

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

struct Stringa {
    int val;
    char *stringa;
    struct Stringa *next;
};

struct Stringa *head = NULL;

void InsertC (char *buff);
void EliminaToken (char *token);
void Stampa ();

int main () {

    char stringa[300];
    char del[50];
    struct Stringa *var;

    printf("Inserire testo libero\n > ");

    fgets(stringa, 300, stdin);
    char * word = strtok(stringa, "\r\n\t ");

    while (word) {
        InsertC(word);
        word = strtok(NULL, "\r\n\t ");
    }


    printf("Inserire stringa da eliminare > ");
    fgets(del, 50, stdin);

    // elimino il newline finale: altrimenti il confronto tra questa parola
    // e quelle nei nodi fallirebbe sicuramente
    *(strchr(del, '\n')) = 0;



    EliminaToken(del);


    Stampa();

     return 0;
}

void InsertC (char *buff) {
    if(!(*buff)) return;

    struct Stringa *pnodo, *ptr;


    pnodo = (struct Stringa *) malloc (sizeof(struct Stringa));
    pnodo->stringa = (char *) malloc (sizeof(char *) * strlen(buff)+1);
    strcpy(pnodo->stringa, buff);
    pnodo->next = NULL;


    if(!head) {
        head = pnodo;
        // printf("%s\n", head->stringa);
    }  else {
        ptr = head;

        while(ptr->next) {
            ptr = ptr->next;
        }

        ptr->next = pnodo;

        // printf("%s\n", ptr->next->stringa);
    }



}



void EliminaToken (char *token) {
    if(!(*token)) return;


    struct Stringa *prev, *curr;

    while(!strcmp(token, head->stringa)) {
        curr = head;
        head = head->next;
        free(curr);
    }

    prev = head;
    curr = head->next;
    while(curr) {

        if(!strcmp(token, curr->stringa)) {
            curr = curr->next;
            free(prev->next);
            prev->next = curr;
            continue;
        }

        prev = curr;
        curr = curr->next;
    }

    return;

}


void Stampa () {
    if(!head) return;

    struct Stringa *curr;

    curr = head;

    while (curr) {
        printf("%s ", curr->stringa);
        curr = curr->next;
    }
}