typedef struct contact{

    char name[50];
    char number[10];
    char bithday[15];
    struct contact *next;
}contact;

struct contact *head;
FILE *fp;

struct contact *ap;

    fp=fopen("save_contacts.txt", "w");

    if(fp==NULL){
        printf(" Errorn");
        system("pause");
        return 1;
    }
    for (ap=head;ap!=NULL;ap=ap->next){
        fprintf(fp,"%s ",ap->name);
        //fprintf(fp,", ");
        fprintf(fp,"%s ",ap->number);
        //fprintf(fp,", ");
        fprintf(fp,"%s ",ap->birthday);
        //fprintf(fp,", ");
        fprintf(fp,"; ");
    }
    fprintf(fp, "End");
}

void read() {
    struct contact *ap;
    int i;
    head=NULL;
    char aux[30];

    FILE *fp=fopen("save_contacts.txt","r");

    do{

        head=NULL;
        ap=(contact*)malloc(sizeof(contact));

        fscanf(fp,"%s ",&ap->name);
        fscanf(fp,"%s ",&ap->number);
        fscanf(fp,"%s ",&ap->birthday);
        fscanf(fp,"%s ",aux);

        if(strcmp(aux,";")==0){
            ap=ap->next;
        }
    }while(strcmp(aux,"End")!=0);

}