Dynamiczne struktury danych

Proszę o pomoc przy funkcjach dodających film oraz klienta. Niestety nie działają.

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

#define N 20




struct movies {
    int id;
    char title[N];
    char producer[N];
    char year[N];
    //bool availibity;

    struct movies *next;

};

struct movies_pointers
{
    struct movies *head , *tail;
}movie;

void load_movie(struct movies *movie){

    puts("Title: ");
    scanf("%s",movie->title);
    puts("Producer: ");
    scanf("%s",movie->producer);
    puts("Publication date: ");
    scanf("%s",movie->year);

    movie->next=NULL;
}

struct movies* add_movie(struct movies *pointer){
	if(pointer){
		struct movies* new_movie = (struct movies *) malloc(sizeof(struct movies));
		if(new_movie){

					   	load_movie(new_movie);

						new_movie->next=pointer;
						new_movie->id=new_movie->next->id+1;

         			   	return new_movie;
					   }
					   else{
					   	printf("Malloc error!\n");
						return pointer;
					   }
	}
	else{
		printf("Lack of list!\n");
		return pointer;
	}
}


void print_movies(struct movies_pointers movie){

    puts("ID \t TITLE \t\t PRODUCER \t\t PUBLICATION DATE");
    while(movie.head){
          printf("%d \t %s \t\t %s \t\t %s \n",movie.head->id, movie.head->title, movie.head->producer, movie.head->year);
        movie.head=movie.head->next;
    }
    puts(" ");
    }

void save_movies(struct movies *movie)
{
    struct movies *tmp = movie;
    if(movie)
    {
    FILE *movies_txt = NULL;
    movies_txt = fopen("movies.txt","w");
    while(tmp!=NULL)
    {
        fprintf(movies_txt, "%s", tmp->title);
        fprintf(movies_txt, "%s\n", tmp->producer);
        fprintf(movies_txt, "%s\n", tmp->year);
        tmp = tmp->next;

    }
      fclose(movies_txt);
    }
    else
    {
        printf("Error");
    }

}

struct movies *movies_from_file(struct movies *pointer){
	 if(pointer){
		FILE * movies_txt = fopen("movies.txt","r");
		while(!feof(movies_txt))
		{
  			  struct movies* new_movie = (struct movies *) malloc(sizeof(struct movies));
			if(new_movie){

						   	fscanf(movies_txt,"%s",new_movie->title);
						   	fscanf(movies_txt,"%s",new_movie->producer);
						   	fscanf(movies_txt,"%s",new_movie->year);

							new_movie->next=pointer;
							new_movie->id=new_movie->next->id+1;
							pointer=new_movie;
   							}
		   else{
			   	printf("Malloc error\n");
				return pointer;
		   }
		}
		fclose(movies_txt);
		return pointer;
	}
	else{
		printf("Lack of list");
		return pointer;
	}
}

void how_many_movies(struct movies_pointers movie){
    int wynik=0;

    while(movie.head){
        movie.head=movie.head->next;
        wynik++;
    }
    printf("The amount of movies in the base is: %d\n\n",wynik);

}

void search_by_title(struct movies_pointers movie, char tag[N]){
    puts("What are you looking for?\n");
    printf("%s\n",tag);
    while(movie.head){
            if(movie.head->title==tag){
                printf("%d \t %s \t %s \t %s",movie.head->id, movie.head->title, movie.head->producer, movie.head->year);

        movie.head=movie.head->next;
            }
        else{
            puts("No results.\n");
            break;
        }


    }


}


struct clients {
    int id;
    char name[N];
    char surname[N];

    struct clients *next;
};

struct clients_pointers
{
    struct clients *head , * tail;
}client;


void load_client(struct clients *client){

    puts("Name: ");
    scanf("%s",client->name);
    puts("Surname: ");
    scanf("%s",client->surname);

    client->next=NULL;
}

struct clients* add_client(struct clients *pointer){
	if(pointer){
		struct clients *new_client = (struct clients*) malloc(sizeof(struct clients));
		if(new_client){

					   	load_client(new_client);

						new_client->next=pointer;
						new_client->id=new_client->next->id+1;

         			   	return new_client;
					   }
					   else{
					   	printf("Malloc error!\n");
						return pointer;
					   }
	}
	else{
		printf("Lack of list!\n");
		return pointer;
	}
}




void print_clients(struct clients_pointers client){

    puts("ID \t NAME \t\t SURNAME");
    while(client.head){
          printf("%d \t %s \t\t %s \n",client.head->id, client.head->name, client.head->surname);
        client.head=client.head->next;
    }
    puts(" ");
    }


void save_clients(struct clients *client)
{
    struct clients *tmp = client;
    if(client)
    {
    FILE *clients_txt = NULL;
    clients_txt = fopen("clients.txt","w");
    while(tmp!=NULL)
    {
        fprintf(clients_txt, "%s", tmp->name);
        fprintf(clients_txt, "%s\n", tmp->surname);
        tmp = tmp->next;

    }
      fclose(clients_txt);
    }
    else
    {
        printf("Error");
    }

}


struct clients *clients_from_file(struct clients *pointer){
	 if(pointer){
		FILE * clients_txt = fopen("clients.txt","r");
		while(!feof(clients_txt))
		{
  			  struct clients* new_client = (struct clients *) malloc(sizeof(struct clients));
			if(new_client){

						   	fscanf(clients_txt,"%s",new_client->name);
						   	fscanf(clients_txt,"%s",new_client->surname);

							new_client->next=pointer;
							new_client->id=new_client->next->id+1;
							pointer=new_client;
   							}
		   else{
			   	printf("Malloc error\n");
				return pointer;
		   }
		}
		fclose(clients_txt);
		return pointer;
	}
	else{
		printf("Lack of list");
		return pointer;
	}
}


int main()
{
    int x;



   puts("1 - LIST OF MOVIES \t 2 - LIST OF CLIENTS \t 3 - AMOUNT OF MOVIES \t 4 - SEARCHING \t 0 - CLOSE \t 5 - ADD MOVIE \t 6 - ADD CLIENT ");
    scanf("%d",&x);

    while(x!=0){

    if(x==1){
    print_movies(movie);
    }else if(x==2){
    print_clients(client);
    }else if(x==3){
    how_many_movies(movie);
    }
    else if(x==4){
    search_by_title(movie,"Matrix");
    }
    else if(x==5){
    add_movie(&movie);
    }
    else if(x==6){
    add_client(&client);
    }
     else{
        puts("wrong code.");
    }

    puts("\n\n\n\n1 - LIST OF MOVIES \t 2 - LIST OF CLIENTS \t 3 - AMOUNT OF MOVIES \t 4 - SEARCHING \t 0 - CLOSE \t 5 - ADD MOVIE \t 6 - ADD CLIENT ");
    scanf("%d",&x);
    }


    return 0;
}